Use codecov and update docs

author: Johannes Ranke <jranke@uni-bremen.de> 2019-02-21 16:03:25 +0100
committer: Johannes Ranke <jranke@uni-bremen.de> 2019-02-21 16:03:25 +0100
commit: f55851e21d471a0ff1a4a72893374c30ca4cf819 (patch)
tree: 9e72a99c7985ff6ecba45e209351d6b43bfcf286 /docs
parent: f8307bd495a0c687e51f600f2bc22f49f9eaccd8 (diff)
19 files changed, 439 insertions, 250 deletions
diff --git a/docs/articles/chemCal.html b/docs/articles/chemCal.html
index 3da10fd..e301880 100644
--- a/docs/articles/chemCal.html
+++ b/docs/articles/chemCal.html
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@@ -22,14 +22,15 @@
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-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
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@@ -66,7 +67,7 @@
       <h1>Introduction to chemCal</h1>
                         <h4 class="author">Johannes Ranke</h4>
             
-            <h4 class="date">2018-07-17</h4>
+            <h4 class="date">2019-02-21</h4>
       
       
       <div class="hidden name"><code>chemCal.Rmd</code></div>
@@ -89,25 +90,25 @@
 <a href="#usage" class="anchor"></a>Usage</h1>
 <p>When calibrating an analytical method, the first task is to generate a suitable model. If we want to use the <code>chemCal</code> functions, we have to restrict ourselves to univariate, possibly weighted, linear regression so far.</p>
 <p>Once such a model has been created, the calibration can be graphically shown by using the <code>calplot</code> function:</p>
-<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw">library</span>(chemCal)
-m0 &lt;-<span class="st"> </span><span class="kw">lm</span>(y <span class="op">~</span><span class="st"> </span>x, <span class="dt">data =</span> massart97ex3)
-<span class="kw"><a href="../reference/calplot.lm.html">calplot</a></span>(m0)</code></pre></div>
+<div class="sourceCode" id="cb1"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/library">library</a></span>(chemCal)</a>
+<a class="sourceLine" id="cb1-2" data-line-number="2">m0 &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/stats/topics/lm">lm</a></span>(y <span class="op">~</span><span class="st"> </span>x, <span class="dt">data =</span> massart97ex3)</a>
+<a class="sourceLine" id="cb1-3" data-line-number="3"><span class="kw"><a href="../reference/calplot.lm.html">calplot</a></span>(m0)</a></code></pre></div>
 <p><img src="chemCal_files/figure-html/unnamed-chunk-1-1.png" width="700"></p>
 <p>As we can see, the scatter increases with increasing x. This is also illustrated by one of the diagnostic plots for linear models provided by R:</p>
-<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw">plot</span>(m0, <span class="dt">which=</span><span class="dv">3</span>)</code></pre></div>
+<div class="sourceCode" id="cb2"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb2-1" data-line-number="1"><span class="kw"><a href="https://www.rdocumentation.org/packages/graphics/topics/plot">plot</a></span>(m0, <span class="dt">which=</span><span class="dv">3</span>)</a></code></pre></div>
 <p><img src="chemCal_files/figure-html/unnamed-chunk-2-1.png" width="700"></p>
 <p>Therefore, in Example 8 in <span class="citation">Massart et al. (1997)</span>, weighted regression is proposed which can be reproduced by the following code. Note that we are building the model on the mean values for each standard in order to be able to reproduce the results given in the book with the current version of chemCal.</p>
-<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r">weights &lt;-<span class="st"> </span><span class="kw">with</span>(massart97ex3, {
-  yx &lt;-<span class="st"> </span><span class="kw">split</span>(y, x)
-  ybar &lt;-<span class="st"> </span><span class="kw">sapply</span>(yx, mean)
-  s &lt;-<span class="st"> </span><span class="kw">round</span>(<span class="kw">sapply</span>(yx, sd), <span class="dt">digits =</span> <span class="dv">2</span>)
-  w &lt;-<span class="st"> </span><span class="kw">round</span>(<span class="dv">1</span> <span class="op">/</span><span class="st"> </span>(s<span class="op">^</span><span class="dv">2</span>), <span class="dt">digits =</span> <span class="dv">3</span>)
-})
-massart97ex3.means &lt;-<span class="st"> </span><span class="kw">aggregate</span>(y <span class="op">~</span><span class="st"> </span>x, massart97ex3, mean)
-
-m &lt;-<span class="st"> </span><span class="kw">lm</span>(y <span class="op">~</span><span class="st"> </span>x, <span class="dt">w =</span> weights, <span class="dt">data =</span> massart97ex3.means)</code></pre></div>
+<div class="sourceCode" id="cb3"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb3-1" data-line-number="1">weights &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/with">with</a></span>(massart97ex3, {</a>
+<a class="sourceLine" id="cb3-2" data-line-number="2">  yx &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/split">split</a></span>(y, x)</a>
+<a class="sourceLine" id="cb3-3" data-line-number="3">  ybar &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/lapply">sapply</a></span>(yx, mean)</a>
+<a class="sourceLine" id="cb3-4" data-line-number="4">  s &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/Round">round</a></span>(<span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/lapply">sapply</a></span>(yx, sd), <span class="dt">digits =</span> <span class="dv">2</span>)</a>
+<a class="sourceLine" id="cb3-5" data-line-number="5">  w &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/Round">round</a></span>(<span class="dv">1</span> <span class="op">/</span><span class="st"> </span>(s<span class="op">^</span><span class="dv">2</span>), <span class="dt">digits =</span> <span class="dv">3</span>)</a>
+<a class="sourceLine" id="cb3-6" data-line-number="6">})</a>
+<a class="sourceLine" id="cb3-7" data-line-number="7">massart97ex3.means &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/stats/topics/aggregate">aggregate</a></span>(y <span class="op">~</span><span class="st"> </span>x, massart97ex3, mean)</a>
+<a class="sourceLine" id="cb3-8" data-line-number="8"></a>
+<a class="sourceLine" id="cb3-9" data-line-number="9">m &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/stats/topics/lm">lm</a></span>(y <span class="op">~</span><span class="st"> </span>x, <span class="dt">w =</span> weights, <span class="dt">data =</span> massart97ex3.means)</a></code></pre></div>
 <p>If we now want to predict a new x value from measured y values, we use the <code>inverse.predict</code> function:</p>
-<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw"><a href="../reference/inverse.predict.html">inverse.predict</a></span>(m, <span class="dv">15</span>, <span class="dt">ws=</span><span class="fl">1.67</span>)</code></pre></div>
+<div class="sourceCode" id="cb4"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb4-1" data-line-number="1"><span class="kw"><a href="../reference/inverse.predict.html">inverse.predict</a></span>(m, <span class="dv">15</span>, <span class="dt">ws=</span><span class="fl">1.67</span>)</a></code></pre></div>
 <pre><code>## $Prediction
 ## [1] 5.865367
 ## 
@@ -119,7 +120,7 @@ m &lt;-<span class="st"> </span><span class="kw">lm</span>(y <span class="op">~<
 ## 
 ## $`Confidence Limits`
 ## [1] 3.387082 8.343652</code></pre>
-<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw"><a href="../reference/inverse.predict.html">inverse.predict</a></span>(m, <span class="dv">90</span>, <span class="dt">ws =</span> <span class="fl">0.145</span>)</code></pre></div>
+<div class="sourceCode" id="cb6"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb6-1" data-line-number="1"><span class="kw"><a href="../reference/inverse.predict.html">inverse.predict</a></span>(m, <span class="dv">90</span>, <span class="dt">ws =</span> <span class="fl">0.145</span>)</a></code></pre></div>
 <pre><code>## $Prediction
 ## [1] 44.06025
 ## 
@@ -138,27 +139,27 @@ m &lt;-<span class="st"> </span><span class="kw">lm</span>(y <span class="op">~<
 <a href="#background-for-inverse-predict" class="anchor"></a>Background for <code>inverse.predict</code>
 </h1>
 <p>Equation 8.28 in <span class="citation">Massart et al. (1997)</span> gives a general equation for predicting the standard error <span class="math inline">\(s_{\hat{x_s}}\)</span> for an <span class="math inline">\(x\)</span> value predicted from measurements of <span class="math inline">\(y\)</span> according to the linear calibration function <span class="math inline">\(y = b_0 + b_1 \cdot x\)</span>:</p>
-<span class="math display">\[\begin{equation}
+<p><span class="math display">\[\begin{equation}
 s_{\hat{x_s}} = \frac{s_e}{b_1} \sqrt{\frac{1}{w_s m} + \frac{1}{\sum{w_i}} +
     \frac{(\bar{y_s} - \bar{y_w})^2 \sum{w_i}}
         {{b_1}^2 \left( \sum{w_i} \sum{w_i {x_i}^2} -
             {\left( \sum{ w_i x_i } \right)}^2 \right) }}
-\end{equation}\]</span>
+\end{equation}\]</span></p>
 <p>with</p>
-<span class="math display">\[\begin{equation}
+<p><span class="math display">\[\begin{equation}
 s_e = \sqrt{ \frac{\sum w_i (y_i - \hat{y_i})^2}{n - 2}}
-\end{equation}\]</span>
+\end{equation}\]</span></p>
 <p>In chemCal version before 0.2, I interpreted <span class="math inline">\(w_i\)</span> to be the weight for calibration standard <span class="math inline">\(i\)</span>, <span class="math inline">\(y_i\)</span> to be the mean value observed for standard <span class="math inline">\(i\)</span>, and <span class="math inline">\(n\)</span> to be the number of calibration standards. With this implementation I was able to reproduce the examples given in the book. However, as noted above, I was made aware of the fact that this way of calculation does not take the variation of the y values about the means into account. Furthermore, I noticed that for the case of unweighted linear calibration with replicate standards, <code>inverse.predict</code> produced different results than <code>calibrate</code> from the <code>investr</code> package when using the Wald method.</p>
 <p>Both issues are now addressed in chemCal starting from version 0.2.1. Here, <span class="math inline">\(y_i\)</span> is calibration measurement <span class="math inline">\(i\)</span>, <span class="math inline">\(\hat{y_i}\)</span> is the estimated value for calibration measurement <span class="math inline">\(i\)</span> and <span class="math inline">\(n\)</span> is the total number of calibration measurements.</p>
 <p><span class="math inline">\(w_s\)</span> is the weight attributed to the sample <span class="math inline">\(s\)</span>, <span class="math inline">\(m\)</span> is the number of replicate measurements of sample <span class="math inline">\(s\)</span>, <span class="math inline">\(\bar{y_s}\)</span> is the mean response for the sample, <span class="math inline">\(\bar{y_w} = \frac{\sum{w_i y_i}}{\sum{w_i}}\)</span> is the weighted mean of responses <span class="math inline">\(y_i\)</span>, and <span class="math inline">\(x_i\)</span> is the given <span class="math inline">\(x\)</span> value for standard <span class="math inline">\(i\)</span>.</p>
 <p>The weight <span class="math inline">\(w_s\)</span> for the sample should be estimated or calculated in accordance to the weights used in the linear regression.</p>
 <p>I had also adjusted the above equation in order to be able to take a different precisions in standards and samples into account. In analogy to Equation 8.26 from  I am using</p>
-<span class="math display">\[\begin{equation}
+<p><span class="math display">\[\begin{equation}
 s_{\hat{x_s}} = \frac{1}{b_1} \sqrt{\frac{{s_s}^2}{w_s m} +
     {s_e}^2 \left( \frac{1}{\sum{w_i}} +
         \frac{(\bar{y_s} - \bar{y_w})^2 \sum{w_i}}
             {{b_1}^2 \left( \sum{w_i} \sum{w_i {x_i}^2} - {\left( \sum{ w_i x_i } \right)}^2 \right) } \right) }
-\end{equation}\]</span>
+\end{equation}\]</span></p>
 <p>where I interpret <span class="math inline">\(\frac{{s_s}^2}{w_s}\)</span> as an estimator of the variance at location <span class="math inline">\(\hat{x_s}\)</span>, which can be replaced by a user-specified value using the argument <code>var.s</code> of the function <code>inverse.predict</code>.</p>
 <div id="refs" class="references">
 <div id="ref-amc89">
@@ -197,9 +198,8 @@ s_{\hat{x_s}} = \frac{1}{b_1} \sqrt{\frac{{s_s}^2}{w_s m} +
 </div>
 
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-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
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-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -115,9 +117,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
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diff --git a/docs/authors.html b/docs/authors.html
index ea55846..82ea4db 100644
--- a/docs/authors.html
+++ b/docs/authors.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Authors • chemCal</title>
 
 <!-- jquery -->
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 <!-- Bootstrap -->
 
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
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+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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 <!-- mathjax -->
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+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
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 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -51,14 +52,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -100,7 +102,7 @@
 
     <ul class="list-unstyled">
       <li>
-        <p><strong>Johannes Ranke</strong>. Author, maintainer, copyright holder. <a href='https://orcid.org/0000-0003-4371-6538' target='orcid.widget'><img src='https://members.orcid.org/sites/default/files/vector_iD_icon.svg' class='orcid' height='16'></a>
+        <p><strong>Johannes Ranke</strong>. Author, maintainer, copyright holder. <a href='https://orcid.org/0000-0003-4371-6538' target='orcid.widget'><img src='https://members.orcid.org/sites/default/files/vector_iD_icon.svg' class='orcid' alt='ORCID' height='16'></a>
         </p>
       </li>
     </ul>
@@ -116,9 +118,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/index.html b/docs/index.html
index 27a99ef..f6b5c52 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,14 +1,14 @@
 <!DOCTYPE html>
-<!-- Generated by pkgdown: do not edit by hand --><html>
+<!-- Generated by pkgdown: do not edit by hand --><html lang="en">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Calibration Functions for Analytical Chemistry • chemCal</title>
-<!-- jquery --><script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script><!-- Bootstrap --><link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
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+<!-- jquery --><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script><!-- Bootstrap --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous">
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+<!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script><!-- sticky kit --><script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script><!-- pkgdown --><link href="pkgdown.css" rel="stylesheet">
 <script src="pkgdown.js"></script><meta property="og:title" content="Calibration Functions for Analytical Chemistry">
 <meta property="og:description" content="Simple functions for plotting linear
 	calibration functions and estimating standard errors for measurements
@@ -18,7 +18,7 @@
 	The functions work on model objects from - optionally weighted - linear
 	regression (lm) or robust linear regression ('rlm' from the 'MASS' package).">
 <meta name="twitter:card" content="summary">
-<!-- mathjax --><script src="https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script><!--[if lt IE 9]>
+<!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>
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 <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
 <![endif]-->
@@ -28,14 +28,15 @@
       <header><div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -68,7 +69,7 @@
       
       </header><div class="row">
   <div class="contents col-md-9">
-    <div id="chemcal---calibration-functions-for-analytical-chemistry" class="section level1">
+<div id="chemcal---calibration-functions-for-analytical-chemistry" class="section level1">
 <div class="page-header"><h1 class="hasAnchor">
 <a href="#chemcal---calibration-functions-for-analytical-chemistry" class="anchor"></a>chemCal - Calibration functions for analytical chemistry</h1></div>
 
@@ -76,7 +77,7 @@
 </div>
   </div>
 
-  <div class="col-md-3" id="sidebar">
+  <div class="col-md-3 hidden-xs hidden-sm" id="sidebar">
     <div class="links">
 <h2>Links</h2>
 <ul class="list-unstyled">
@@ -95,7 +96,7 @@
 <div class="developers">
 <h2>Developers</h2>
 <ul class="list-unstyled">
-<li>Johannes Ranke <br><small class="roles"> Author, maintainer, copyright holder </small> <a href="https://orcid.org/0000-0003-4371-6538" target="orcid.widget"><img src="https://members.orcid.org/sites/default/files/vector_iD_icon.svg" class="orcid" height="16"></a> </li>
+<li>Johannes Ranke <br><small class="roles"> Author, maintainer, copyright holder </small> <a href="https://orcid.org/0000-0003-4371-6538" target="orcid.widget"><img src="https://members.orcid.org/sites/default/files/vector_iD_icon.svg" class="orcid" alt="ORCID" height="16"></a> </li>
 </ul>
 </div>
 
@@ -103,20 +104,20 @@
 <h2>Dev status</h2>
 <ul class="list-unstyled">
 <li><a href="https://cran.r-project.org/package=chemCal"><img src="https://www.r-pkg.org/badges/version/chemCal"></a></li>
+<li><a href="https://travis-ci.com/jranke/chemCal"><img src="https://travis-ci.com/jranke/chemCal.svg?branch=master" alt="Build Status"></a></li>
+<li><a href="https://codecov.io/github/jranke/chemCal"><img src="https://codecov.io/github/jranke/chemCal/branch/master/graphs/badge.svg" alt="codecov"></a></li>
 </ul>
 </div>
 </div>
 </div>
 
-
       <footer><div class="copyright">
   <p>Developed by Johannes Ranke.</p>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
 </div>
 
diff --git a/docs/news/index.html b/docs/news/index.html
index 4b81671..1976391 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Changelog • chemCal</title>
 
 <!-- jquery -->
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+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
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+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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@@ -35,7 +35,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -51,14 +52,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -99,6 +101,14 @@
       
     </div>
 
+    <div id="chemcal-0-2-2" class="section level1">
+<h1 class="page-header">
+<a href="#chemcal-0-2-2" class="anchor"></a>chemCal 0.2.2<small> Unreleased </small>
+</h1>
+<ul>
+<li>Added the cadmium dataset from Rocke and Lorenzato (1995)</li>
+</ul>
+</div>
     <div id="chemcal-0-2-1" class="section level1">
 <h1 class="page-header">
 <a href="#chemcal-0-2-1" class="anchor"></a>chemCal 0.2.1<small> 2018-07-17 </small>
@@ -135,6 +145,7 @@
     <div id="tocnav">
       <h2>Contents</h2>
       <ul class="nav nav-pills nav-stacked">
+        <li><a href="#chemcal-0-2-2">0.2.2</a></li>
         <li><a href="#chemcal-0-2-1">0.2.1</a></li>
         <li><a href="#chemcal-0-1-37">0.1-37</a></li>
         <li><a href="#chemcal-0-1-34">0.1-34</a></li>
@@ -150,9 +161,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/pkgdown.css b/docs/pkgdown.css
index 6ca2f37..c03fb08 100644
--- a/docs/pkgdown.css
+++ b/docs/pkgdown.css
@@ -58,9 +58,14 @@ img {
   max-width: 100%;
 }
 
+/* Fix bug in bootstrap (only seen in firefox) */
+summary {
+  display: list-item;
+}
+
 /* Typographic tweaking ---------------------------------*/
 
-.contents h1.page-header {
+.contents .page-header {
   margin-top: calc(-60px + 1em);
 }
 
@@ -136,10 +141,9 @@ a.anchor {
 .ref-index th {font-weight: normal;}
 
 .ref-index td {vertical-align: top;}
+.ref-index .icon {width: 40px;}
 .ref-index .alias {width: 40%;}
-.ref-index .title {width: 60%;}
-
-.ref-index .alias {width: 40%;}
+.ref-index-icons .alias {width: calc(40% - 40px);}
 .ref-index .title {width: 60%;}
 
 .ref-arguments th {text-align: right; padding-right: 10px;}
diff --git a/docs/pkgdown.js b/docs/pkgdown.js
index de9bd72..eb7e83d 100644
--- a/docs/pkgdown.js
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@@ -25,9 +25,13 @@
     for (var i = 0; i < links.length; i++) {
       if (links[i].getAttribute("href") === "#")
         continue;
-      var path = paths(links[i].pathname);
+      // Ignore external links
+      if (links[i].host !== location.host)
+        continue;
+
+      var nav_path = paths(links[i].pathname);
 
-      var length = prefix_length(cur_path, path);
+      var length = prefix_length(nav_path, cur_path);
       if (length > max_length) {
         max_length = length;
         pos = i;
@@ -52,13 +56,14 @@
     return(pieces);
   }
 
+  // Returns -1 if not found
   function prefix_length(needle, haystack) {
     if (needle.length > haystack.length)
-      return(0);
+      return(-1);
 
     // Special case for length-0 haystack, since for loop won't run
     if (haystack.length === 0) {
-      return(needle.length === 0 ? 1 : 0);
+      return(needle.length === 0 ? 0 : -1);
     }
 
     for (var i = 0; i < haystack.length; i++) {
@@ -78,9 +83,9 @@
     element.setAttribute('data-original-title', tooltipOriginalTitle);
   }
 
-  if(Clipboard.isSupported()) {
+  if(ClipboardJS.isSupported()) {
     $(document).ready(function() {
-      var copyButton = "<button type='button' class='btn btn-primary btn-copy-ex' type = 'submit' title='Copy to clipboard' aria-hidden='true' data-toggle='tooltip' data-placement='left auto' data-trigger='hover' data-clipboard-copy><i class='fa fa-copy' aria-hidden='true'></i></button>";
+      var copyButton = "<button type='button' class='btn btn-primary btn-copy-ex' type = 'submit' title='Copy to clipboard' aria-label='Copy to clipboard' data-toggle='tooltip' data-placement='left auto' data-trigger='hover' data-clipboard-copy><i class='fa fa-copy'></i></button>";
 
       $(".examples, div.sourceCode").addClass("hasCopyButton");
 
@@ -91,7 +96,7 @@
       $('.btn-copy-ex').tooltip({container: 'body'});
 
       // Initialize clipboard:
-      var clipboardBtnCopies = new Clipboard('[data-clipboard-copy]', {
+      var clipboardBtnCopies = new ClipboardJS('[data-clipboard-copy]', {
         text: function(trigger) {
           return trigger.parentNode.textContent;
         }
diff --git a/docs/pkgdown.yml b/docs/pkgdown.yml
index 3b5e371..8d2bc22 100644
--- a/docs/pkgdown.yml
+++ b/docs/pkgdown.yml
@@ -1,5 +1,5 @@
-pandoc: 1.19.2.4
-pkgdown: 1.1.0
+pandoc: 2.2.1
+pkgdown: 1.3.0
 pkgdown_sha: ~
 articles:
   chemCal: chemCal.html
diff --git a/docs/reference/calplot.lm.html b/docs/reference/calplot.lm.html
index a5b3bbb..18ce82f 100644
--- a/docs/reference/calplot.lm.html
+++ b/docs/reference/calplot.lm.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Plot calibration graphs from univariate linear models — calplot • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
 <!-- sticky kit -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -39,7 +39,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -55,14 +56,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -111,7 +113,7 @@
     
     </div>
 
-    <pre class="usage"><span class='fu'>calplot</span>(<span class='no'>object</span>, <span class='kw'>xlim</span> <span class='kw'>=</span> <span class='fu'>c</span>(<span class='st'>"auto"</span>, <span class='st'>"auto"</span>), <span class='kw'>ylim</span> <span class='kw'>=</span> <span class='fu'>c</span>(<span class='st'>"auto"</span>, <span class='st'>"auto"</span>),
+    <pre class="usage"><span class='fu'>calplot</span>(<span class='no'>object</span>, <span class='kw'>xlim</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='st'>"auto"</span>, <span class='st'>"auto"</span>), <span class='kw'>ylim</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='st'>"auto"</span>, <span class='st'>"auto"</span>),
     <span class='kw'>xlab</span> <span class='kw'>=</span> <span class='st'>"Concentration"</span>, <span class='kw'>ylab</span> <span class='kw'>=</span> <span class='st'>"Response"</span>, <span class='kw'>alpha</span><span class='kw'>=</span><span class='fl'>0.05</span>, <span class='kw'>varfunc</span> <span class='kw'>=</span> <span class='kw'>NULL</span>)</pre>
     
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
@@ -119,8 +121,8 @@
     <colgroup><col class="name" /><col class="desc" /></colgroup>
     <tr>
       <th>object</th>
-      <td><p>A univariate model object of class <code>lm</code> or 
-    <code><a href='http://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
+      <td><p>A univariate model object of class <code><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></code> or 
+    <code><a href='https://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
     with model formula <code>y ~ x</code> or <code>y ~ x - 1</code>.</p></td>
     </tr>
     <tr>
@@ -163,7 +165,7 @@
     <p>Prediction bands for models from weighted linear regression require weights
   for the data, for which responses should be predicted. Prediction intervals
   using weights e.g. from a variance function are currently not supported by
-  the internally used function <code>predict.lm</code>, therefore,
+  the internally used function <code><a href='https://www.rdocumentation.org/packages/stats/topics/predict.lm'>predict.lm</a></code>, therefore,
   <code>calplot</code> does not draw prediction bands for such models.</p>  
 <p>It is possible to compare the <code>calplot</code> prediction bands with the
   <code><a href='lod.html'>lod</a></code> values if the <code><a href='lod.html'>lod()</a></code> alpha and beta parameters are
@@ -171,8 +173,8 @@
     
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='fu'>data</span>(<span class='no'>massart97ex3</span>)
-<span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3</span>)
+    <pre class="examples"><div class='input'><span class='fu'><a href='https://www.rdocumentation.org/packages/utils/topics/data'>data</a></span>(<span class='no'>massart97ex3</span>)
+<span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3</span>)
 <span class='fu'>calplot</span>(<span class='no'>m</span>)</div><div class='img'><img src='calplot.lm-1.png' alt='' width='700' height='433' /></div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="sidebar">
@@ -188,11 +190,8 @@
     </ul>
 
     <h2>Author</h2>
-    
-  Johannes Ranke 
-  <a href='mailto:jranke@uni-bremen.de'>jranke@uni-bremen.de</a> 
-  <a href='http://www.uft.uni-bremen.de/chemie/ranke'>http://www.uft.uni-bremen.de/chemie/ranke</a>
-
+    <p>Johannes Ranke 
+  <a href='mailto:jranke@uni-bremen.de'>jranke@uni-bremen.de</a></p>
   </div>
 </div>
 
@@ -202,9 +201,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/din32645.html b/docs/reference/din32645.html
index dbc9504..8d46c24 100644
--- a/docs/reference/din32645.html
+++ b/docs/reference/din32645.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Calibration data from DIN 32645 — din32645 • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
 <!-- sticky kit -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -38,7 +38,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -54,14 +55,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -109,7 +111,7 @@
     
     </div>
 
-    <pre class="usage"><span class='fu'>data</span>(<span class='no'>din32645</span>)</pre>
+    <pre class="usage"><span class='fu'><a href='https://www.rdocumentation.org/packages/utils/topics/data'>data</a></span>(<span class='no'>din32645</span>)</pre>
         
     <h2 class="hasAnchor" id="format"><a class="anchor" href="#format"></a>Format</h2>
 
@@ -127,32 +129,32 @@
     
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>din32645</span>)
+    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>din32645</span>)
 <span class='fu'><a href='calplot.lm.html'>calplot</a></span>(<span class='no'>m</span>)</div><div class='img'><img src='din32645-1.png' alt='' width='700' height='433' /></div><div class='input'>
 <span class='co'>## Prediction of x with confidence interval</span>
 <span class='no'>prediction</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='inverse.predict.html'>inverse.predict</a></span>(<span class='no'>m</span>, <span class='fl'>3500</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>0.01</span>)
 
 <span class='co'># This should give 0.07434 according to test data from Dintest, which </span>
 <span class='co'># was collected from Procontrol 3.1 (isomehr GmbH) in this case</span>
-<span class='fu'>round</span>(<span class='no'>prediction</span>$<span class='no'>Confidence</span>, <span class='fl'>5</span>)</div><div class='output co'>#&gt; [1] 0.07434</div><div class='input'>
+<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='no'>prediction</span>$<span class='no'>Confidence</span>, <span class='fl'>5</span>)</div><div class='output co'>#&gt; [1] 0.07434</div><div class='input'>
 <span class='co'>## Critical value:</span>
 <span class='no'>crit</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='lod.html'>lod</a></span>(<span class='no'>m</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>0.01</span>, <span class='kw'>beta</span> <span class='kw'>=</span> <span class='fl'>0.5</span>)
 
 <span class='co'># According to DIN 32645, we should get 0.07 for the critical value</span>
 <span class='co'># (decision limit, "Nachweisgrenze")</span>
-<span class='fu'>round</span>(<span class='no'>crit</span>$<span class='no'>x</span>, <span class='fl'>2</span>)</div><div class='output co'>#&gt; [1] 0.07</div><div class='input'><span class='co'># and according to Dintest test data, we should get 0.0698 from</span>
-<span class='fu'>round</span>(<span class='no'>crit</span>$<span class='no'>x</span>, <span class='fl'>4</span>)</div><div class='output co'>#&gt; [1] 0.0698</div><div class='input'>
+<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='no'>crit</span>$<span class='no'>x</span>, <span class='fl'>2</span>)</div><div class='output co'>#&gt; [1] 0.07</div><div class='input'><span class='co'># and according to Dintest test data, we should get 0.0698 from</span>
+<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='no'>crit</span>$<span class='no'>x</span>, <span class='fl'>4</span>)</div><div class='output co'>#&gt; [1] 0.0698</div><div class='input'>
 <span class='co'>## Limit of detection (smallest detectable value given alpha and beta)</span>
 <span class='co'># In German, the smallest detectable value is the "Erfassungsgrenze", and we</span>
 <span class='co'># should get 0.14 according to DIN, which we achieve by using the method </span>
 <span class='co'># described in it:</span>
 <span class='no'>lod.din</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='lod.html'>lod</a></span>(<span class='no'>m</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>0.01</span>, <span class='kw'>beta</span> <span class='kw'>=</span> <span class='fl'>0.01</span>, <span class='kw'>method</span> <span class='kw'>=</span> <span class='st'>"din"</span>)
-<span class='fu'>round</span>(<span class='no'>lod.din</span>$<span class='no'>x</span>, <span class='fl'>2</span>)</div><div class='output co'>#&gt; [1] 0.14</div><div class='input'>
+<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='no'>lod.din</span>$<span class='no'>x</span>, <span class='fl'>2</span>)</div><div class='output co'>#&gt; [1] 0.14</div><div class='input'>
 <span class='co'>## Limit of quantification</span>
 <span class='co'># This accords to the test data coming with the test data from Dintest again, </span>
 <span class='co'># except for the last digits of the value cited for Procontrol 3.1 (0.2121)</span>
 <span class='no'>loq</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='loq.html'>loq</a></span>(<span class='no'>m</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>0.01</span>)
-<span class='fu'>round</span>(<span class='no'>loq</span>$<span class='no'>x</span>, <span class='fl'>4</span>)</div><div class='output co'>#&gt; [1] 0.212</div><div class='input'>
+<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='no'>loq</span>$<span class='no'>x</span>, <span class='fl'>4</span>)</div><div class='output co'>#&gt; [1] 0.212</div><div class='input'>
 <span class='co'># A similar value is obtained using the approximation </span>
 <span class='co'># LQ = 3.04 * LC (Currie 1999, p. 120)</span>
 <span class='fl'>3.04</span> * <span class='fu'><a href='lod.html'>lod</a></span>(<span class='no'>m</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>0.01</span>, <span class='kw'>beta</span> <span class='kw'>=</span> <span class='fl'>0.5</span>)$<span class='no'>x</span></div><div class='output co'>#&gt; [1] 0.2122306</div></pre>
@@ -177,9 +179,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/index.html b/docs/reference/index.html
index a1add77..0be3f99 100644
--- a/docs/reference/index.html
+++ b/docs/reference/index.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Function reference • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
 <!-- sticky kit -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -35,7 +35,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -51,14 +52,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -158,9 +160,15 @@
       </tr><tr>
         
         <td>
+          <p><code><a href="rl95_cadmium.html">rl95_cadmium</a></code> </p>
+        </td>
+        <td><p>Cadmium concentrations measured by AAS as reported by Rocke and Lorenzato (1995)</p></td>
+      </tr><tr>
+        
+        <td>
           <p><code><a href="rl95_toluene.html">rl95_toluene</a></code> </p>
         </td>
-        <td><p>Toluene amounts by GC/MS as reported by Rocke and Lorenzato (1995)</p></td>
+        <td><p>Toluene amounts measured by GC/MS as reported by Rocke and Lorenzato (1995)</p></td>
       </tr><tr>
         
         <td>
@@ -186,9 +194,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/inverse.predict.html b/docs/reference/inverse.predict.html
index b107154..4ea9a75 100644
--- a/docs/reference/inverse.predict.html
+++ b/docs/reference/inverse.predict.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Predict x from y for a linear calibration — inverse.predict • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
 <!-- sticky kit -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -47,7 +47,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -63,14 +64,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -135,8 +137,8 @@
     <colgroup><col class="name" /><col class="desc" /></colgroup>
     <tr>
       <th>object</th>
-      <td><p>A univariate model object of class <code>lm</code> or 
-    <code><a href='http://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
+      <td><p>A univariate model object of class <code><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></code> or 
+    <code><a href='https://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
     with model formula <code>y ~ x</code> or <code>y ~ x - 1</code>.</p></td>
     </tr>
     <tr>
@@ -188,7 +190,7 @@
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
     <pre class="examples"><div class='input'><span class='co'># This is example 7 from Chapter 8 in Massart et al. (1997)</span>
-<span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex1</span>)
+<span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex1</span>)
 <span class='fu'>inverse.predict</span>(<span class='no'>m</span>, <span class='fl'>15</span>)        <span class='co'>#  6.1 +- 4.9</span></div><div class='output co'>#&gt; $Prediction
 #&gt; [1] 6.09381
 #&gt; 
@@ -211,7 +213,7 @@
 #&gt; 
 #&gt; $`Confidence Limits`
 #&gt; [1] 39.03178 48.84788
-#&gt; </div><div class='input'><span class='fu'>inverse.predict</span>(<span class='no'>m</span>, <span class='fu'>rep</span>(<span class='fl'>90</span>,<span class='fl'>5</span>)) <span class='co'># 43.9 +- 3.2</span></div><div class='output co'>#&gt; $Prediction
+#&gt; </div><div class='input'><span class='fu'>inverse.predict</span>(<span class='no'>m</span>, <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/rep'>rep</a></span>(<span class='fl'>90</span>,<span class='fl'>5</span>)) <span class='co'># 43.9 +- 3.2</span></div><div class='output co'>#&gt; $Prediction
 #&gt; [1] 43.93983
 #&gt; 
 #&gt; $`Standard Error`
@@ -225,16 +227,16 @@
 #&gt; </div><div class='input'>
 <span class='co'># For reproducing the results for replicate standard measurements in example 8,</span>
 <span class='co'># we need to do the calibration on the means when using chemCal &gt; 0.2</span>
-<span class='no'>weights</span> <span class='kw'>&lt;-</span> <span class='fu'>with</span>(<span class='no'>massart97ex3</span>, {
-  <span class='no'>yx</span> <span class='kw'>&lt;-</span> <span class='fu'>split</span>(<span class='no'>y</span>, <span class='no'>x</span>)
-  <span class='no'>ybar</span> <span class='kw'>&lt;-</span> <span class='fu'>sapply</span>(<span class='no'>yx</span>, <span class='no'>mean</span>)
-  <span class='no'>s</span> <span class='kw'>&lt;-</span> <span class='fu'>round</span>(<span class='fu'>sapply</span>(<span class='no'>yx</span>, <span class='no'>sd</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>2</span>)
-  <span class='no'>w</span> <span class='kw'>&lt;-</span> <span class='fu'>round</span>(<span class='fl'>1</span> / (<span class='no'>s</span>^<span class='fl'>2</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>3</span>)
+<span class='no'>weights</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/with'>with</a></span>(<span class='no'>massart97ex3</span>, {
+  <span class='no'>yx</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/split'>split</a></span>(<span class='no'>y</span>, <span class='no'>x</span>)
+  <span class='no'>ybar</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/lapply'>sapply</a></span>(<span class='no'>yx</span>, <span class='no'>mean</span>)
+  <span class='no'>s</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/lapply'>sapply</a></span>(<span class='no'>yx</span>, <span class='no'>sd</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>2</span>)
+  <span class='no'>w</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='fl'>1</span> / (<span class='no'>s</span>^<span class='fl'>2</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>3</span>)
 })
 
-<span class='no'>massart97ex3.means</span> <span class='kw'>&lt;-</span> <span class='fu'>aggregate</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='no'>massart97ex3</span>, <span class='no'>mean</span>)
+<span class='no'>massart97ex3.means</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/aggregate'>aggregate</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='no'>massart97ex3</span>, <span class='no'>mean</span>)
 
-<span class='no'>m3.means</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>w</span> <span class='kw'>=</span> <span class='no'>weights</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3.means</span>)
+<span class='no'>m3.means</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>w</span> <span class='kw'>=</span> <span class='no'>weights</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3.means</span>)
 
 <span class='fu'>inverse.predict</span>(<span class='no'>m3.means</span>, <span class='fl'>15</span>, <span class='kw'>ws</span> <span class='kw'>=</span> <span class='fl'>1.67</span>)  <span class='co'># 5.9 +- 2.5</span></div><div class='output co'>#&gt; $Prediction
 #&gt; [1] 5.865367
@@ -284,9 +286,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/lod.html b/docs/reference/lod.html
index b3d9574..dcde1b3 100644
--- a/docs/reference/lod.html
+++ b/docs/reference/lod.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Estimate a limit of detection (LOD) — lod • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -45,7 +45,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -61,14 +62,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -130,8 +132,8 @@
     <colgroup><col class="name" /><col class="desc" /></colgroup>
     <tr>
       <th>object</th>
-      <td><p>A univariate model object of class <code>lm</code> or 
-    <code><a href='http://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
+      <td><p>A univariate model object of class <code><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></code> or 
+    <code><a href='https://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
     with model formula <code>y ~ x</code> or <code>y ~ x - 1</code>, 
     optionally from a weighted regression.</p></td>
     </tr>
@@ -176,7 +178,7 @@
     xD from the LOD in the signal domain SD is done by simply inverting the
     calibration function (i.e. assuming a known calibration function).
   - The calculation of a LOD from weighted calibration models requires
-    a weights argument for the internally used <code>predict.lm</code>
+    a weights argument for the internally used <code><a href='https://www.rdocumentation.org/packages/stats/topics/predict.lm'>predict.lm</a></code>
     function, which is currently not supported in R.</p>
     
     <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>
@@ -197,7 +199,7 @@
     
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>din32645</span>)
+    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>din32645</span>)
 <span class='fu'>lod</span>(<span class='no'>m</span>)</div><div class='output co'>#&gt; $x
 #&gt; [1] 0.08655484
 #&gt; 
@@ -238,9 +240,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/loq.html b/docs/reference/loq.html
index eee0925..c159638 100644
--- a/docs/reference/loq.html
+++ b/docs/reference/loq.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Estimate a limit of quantification (LOQ) — loq • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
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-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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@@ -44,7 +44,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -60,14 +61,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -129,8 +131,8 @@
     <colgroup><col class="name" /><col class="desc" /></colgroup>
     <tr>
       <th>object</th>
-      <td><p>A univariate model object of class <code>lm</code> or 
-    <code><a href='http://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
+      <td><p>A univariate model object of class <code><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></code> or 
+    <code><a href='https://www.rdocumentation.org/packages/MASS/topics/rlm'>rlm</a></code> 
     with model formula <code>y ~ x</code> or <code>y ~ x - 1</code>, 
     optionally from a weighted regression. If weights are specified
     in the model, either <code>w.loq</code> or <code>var.loq</code> have to 
@@ -193,7 +195,7 @@
     
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex1</span>)
+    <pre class="examples"><div class='input'><span class='no'>m</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex1</span>)
 <span class='fu'>loq</span>(<span class='no'>m</span>)</div><div class='output co'>#&gt; $x
 #&gt; [1] 13.97764
 #&gt; 
@@ -231,9 +233,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/massart97ex1.html b/docs/reference/massart97ex1.html
index 844023f..d9deb36 100644
--- a/docs/reference/massart97ex1.html
+++ b/docs/reference/massart97ex1.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Calibration data from Massart et al. (1997), example 1 — massart97ex1 • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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@@ -38,7 +38,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -54,14 +55,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -109,7 +111,7 @@
     
     </div>
 
-    <pre class="usage"><span class='fu'>data</span>(<span class='no'>massart97ex1</span>)</pre>
+    <pre class="usage"><span class='fu'><a href='https://www.rdocumentation.org/packages/utils/topics/data'>data</a></span>(<span class='no'>massart97ex1</span>)</pre>
         
     <h2 class="hasAnchor" id="format"><a class="anchor" href="#format"></a>Format</h2>
 
@@ -141,9 +143,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/massart97ex3.html b/docs/reference/massart97ex3.html
index e9fa06a..c1bbbc2 100644
--- a/docs/reference/massart97ex3.html
+++ b/docs/reference/massart97ex3.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Calibration data from Massart et al. (1997), example 3 — massart97ex3 • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
 <!-- Font Awesome icons -->
-<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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 <script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
@@ -38,7 +38,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -54,14 +55,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -126,16 +128,16 @@
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
     <pre class="examples"><div class='input'><span class='co'># For reproducing the results for replicate standard measurements in example 8,</span>
 <span class='co'># we need to do the calibration on the means when using chemCal &gt; 0.2</span>
-<span class='no'>weights</span> <span class='kw'>&lt;-</span> <span class='fu'>with</span>(<span class='no'>massart97ex3</span>, {
-  <span class='no'>yx</span> <span class='kw'>&lt;-</span> <span class='fu'>split</span>(<span class='no'>y</span>, <span class='no'>x</span>)
-  <span class='no'>ybar</span> <span class='kw'>&lt;-</span> <span class='fu'>sapply</span>(<span class='no'>yx</span>, <span class='no'>mean</span>)
-  <span class='no'>s</span> <span class='kw'>&lt;-</span> <span class='fu'>round</span>(<span class='fu'>sapply</span>(<span class='no'>yx</span>, <span class='no'>sd</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>2</span>)
-  <span class='no'>w</span> <span class='kw'>&lt;-</span> <span class='fu'>round</span>(<span class='fl'>1</span> / (<span class='no'>s</span>^<span class='fl'>2</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>3</span>)
+<span class='no'>weights</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/with'>with</a></span>(<span class='no'>massart97ex3</span>, {
+  <span class='no'>yx</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/split'>split</a></span>(<span class='no'>y</span>, <span class='no'>x</span>)
+  <span class='no'>ybar</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/lapply'>sapply</a></span>(<span class='no'>yx</span>, <span class='no'>mean</span>)
+  <span class='no'>s</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/lapply'>sapply</a></span>(<span class='no'>yx</span>, <span class='no'>sd</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>2</span>)
+  <span class='no'>w</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/Round'>round</a></span>(<span class='fl'>1</span> / (<span class='no'>s</span>^<span class='fl'>2</span>), <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>3</span>)
 })
 
-<span class='no'>massart97ex3.means</span> <span class='kw'>&lt;-</span> <span class='fu'>aggregate</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='no'>massart97ex3</span>, <span class='no'>mean</span>)
+<span class='no'>massart97ex3.means</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/aggregate'>aggregate</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='no'>massart97ex3</span>, <span class='no'>mean</span>)
 
-<span class='no'>m3.means</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>w</span> <span class='kw'>=</span> <span class='no'>weights</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3.means</span>)
+<span class='no'>m3.means</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>w</span> <span class='kw'>=</span> <span class='no'>weights</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3.means</span>)
 
 <span class='co'># The following concords with the book p. 200</span>
 <span class='fu'><a href='inverse.predict.html'>inverse.predict</a></span>(<span class='no'>m3.means</span>, <span class='fl'>15</span>, <span class='kw'>ws</span> <span class='kw'>=</span> <span class='fl'>1.67</span>)  <span class='co'># 5.9 +- 2.5</span></div><div class='output co'>#&gt; $Prediction
@@ -163,7 +165,7 @@
 #&gt; </div><div class='input'>
 <span class='co'># The LOD is only calculated for models from unweighted regression</span>
 <span class='co'># with this version of chemCal</span>
-<span class='no'>m0</span> <span class='kw'>&lt;-</span> <span class='fu'>lm</span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3</span>)
+<span class='no'>m0</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/lm'>lm</a></span>(<span class='no'>y</span> ~ <span class='no'>x</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>massart97ex3</span>)
 <span class='fu'><a href='lod.html'>lod</a></span>(<span class='no'>m0</span>)</div><div class='output co'>#&gt; $x
 #&gt; [1] 5.407085
 #&gt; 
@@ -212,9 +214,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/rl95_cadmium.html b/docs/reference/rl95_cadmium.html
new file mode 100644
index 0000000..6678817
--- /dev/null
+++ b/docs/reference/rl95_cadmium.html
@@ -0,0 +1,154 @@
+<!-- Generated by pkgdown: do not edit by hand -->
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+  <meta charset="utf-8">
+<meta http-equiv="X-UA-Compatible" content="IE=edge">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+<title>Cadmium concentrations measured by AAS as reported by Rocke and Lorenzato (1995) — rl95_cadmium • chemCal</title>
+
+<!-- jquery -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
+<!-- Bootstrap -->
+
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
+
+<!-- Font Awesome icons -->
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
+
+<!-- clipboard.js -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
+
+<!-- sticky kit -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/sticky-kit/1.1.3/sticky-kit.min.js" integrity="sha256-c4Rlo1ZozqTPE2RLuvbusY3+SU1pQaJC0TjuhygMipw=" crossorigin="anonymous"></script>
+
+<!-- pkgdown -->
+<link href="../pkgdown.css" rel="stylesheet">
+<script src="../pkgdown.js"></script>
+
+
+
+<meta property="og:title" content="Cadmium concentrations measured by AAS as reported by Rocke and Lorenzato (1995) — rl95_cadmium" />
+
+<meta property="og:description" content="Dataset reproduced from Table 1 in Rocke and Lorenzato (1995)." />
+<meta name="twitter:card" content="summary" />
+
+
+
+<!-- mathjax -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
+
+<!--[if lt IE 9]>
+<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
+<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
+<![endif]-->
+
+
+  </head>
+
+  <body>
+    <div class="container template-reference-topic">
+      <header>
+      <div class="navbar navbar-default navbar-fixed-top" role="navigation">
+  <div class="container">
+    <div class="navbar-header">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
+        <span class="icon-bar"></span>
+        <span class="icon-bar"></span>
+        <span class="icon-bar"></span>
+      </button>
+      <span class="navbar-brand">
+        <a class="navbar-link" href="../index.html">chemCal</a>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
+      </span>
+    </div>
+
+    <div id="navbar" class="navbar-collapse collapse">
+      <ul class="nav navbar-nav">
+        <li>
+  <a href="../index.html">
+    <span class="fa fa-home fa-lg"></span>
+     
+  </a>
+</li>
+<li>
+  <a href="../articles/chemCal.html">Get started</a>
+</li>
+<li>
+  <a href="../reference/index.html">Reference</a>
+</li>
+<li>
+  <a href="../news/index.html">Changelog</a>
+</li>
+      </ul>
+      
+      <ul class="nav navbar-nav navbar-right">
+        
+      </ul>
+      
+    </div><!--/.nav-collapse -->
+  </div><!--/.container -->
+</div><!--/.navbar -->
+
+      
+      </header>
+
+<div class="row">
+  <div class="col-md-9 contents">
+    <div class="page-header">
+    <h1>Cadmium concentrations measured by AAS as reported by Rocke and Lorenzato (1995)</h1>
+    
+    <div class="hidden name"><code>rl95_cadmium.Rd</code></div>
+    </div>
+
+    <div class="ref-description">
+    
+    <p>Dataset reproduced from Table 1 in Rocke and Lorenzato (1995).</p>
+    
+    </div>
+
+        
+    <h2 class="hasAnchor" id="format"><a class="anchor" href="#format"></a>Format</h2>
+
+    <p>A dataframe containing four replicate observations for each 
+  of the six calibration standards.</p>
+    
+    <h2 class="hasAnchor" id="source"><a class="anchor" href="#source"></a>Source</h2>
+
+    <p>Rocke, David M. und Lorenzato, Stefan (1995) A two-component model for
+  measurement error in analytical chemistry. Technometrics 37(2), 176-184.</p>
+    
+
+  </div>
+  <div class="col-md-3 hidden-xs hidden-sm" id="sidebar">
+    <h2>Contents</h2>
+    <ul class="nav nav-pills nav-stacked">
+      
+      <li><a href="#format">Format</a></li>
+
+      <li><a href="#source">Source</a></li>
+          </ul>
+
+  </div>
+</div>
+
+      <footer>
+      <div class="copyright">
+  <p>Developed by Johannes Ranke.</p>
+</div>
+
+<div class="pkgdown">
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
+</div>
+      </footer>
+   </div>
+
+  
+
+  </body>
+</html>
+
diff --git a/docs/reference/rl95_toluene.html b/docs/reference/rl95_toluene.html
index b252760..805249f 100644
--- a/docs/reference/rl95_toluene.html
+++ b/docs/reference/rl95_toluene.html
@@ -1,25 +1,25 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-<title>Toluene amounts by GC/MS as reported by Rocke and Lorenzato (1995) — rl95_toluene • chemCal</title>
+<title>Toluene amounts measured by GC/MS as reported by Rocke and Lorenzato (1995) — rl95_toluene • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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@@ -30,7 +30,7 @@
 
 
 
-<meta property="og:title" content="Toluene amounts by GC/MS as reported by Rocke and Lorenzato (1995) — rl95_toluene" />
+<meta property="og:title" content="Toluene amounts measured by GC/MS as reported by Rocke and Lorenzato (1995) — rl95_toluene" />
 
 <meta property="og:description" content="Dataset reproduced from Table 4 in Rocke and Lorenzato (1995)." />
 <meta name="twitter:card" content="summary" />
@@ -38,7 +38,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -54,14 +55,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -98,7 +100,7 @@
 <div class="row">
   <div class="col-md-9 contents">
     <div class="page-header">
-    <h1>Toluene amounts by GC/MS as reported by Rocke and Lorenzato (1995)</h1>
+    <h1>Toluene amounts measured by GC/MS as reported by Rocke and Lorenzato (1995)</h1>
     
     <div class="hidden name"><code>rl95_toluene.Rd</code></div>
     </div>
@@ -140,9 +142,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
 
diff --git a/docs/reference/utstats14.html b/docs/reference/utstats14.html
index c16955f..1385339 100644
--- a/docs/reference/utstats14.html
+++ b/docs/reference/utstats14.html
@@ -1,6 +1,6 @@
 <!-- Generated by pkgdown: do not edit by hand -->
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
   <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
@@ -9,17 +9,17 @@
 <title>Example data for calibration with replicates from University of Toronto — utstats14 • chemCal</title>
 
 <!-- jquery -->
-<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
-<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>
 
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha256-eZrrJcwDc/3uDhsdt61sL2oOBY362qM3lon1gyExkL0=" crossorigin="anonymous" />
 
 <!-- clipboard.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js" integrity="sha256-FiZwavyI2V6+EXO1U+xzLG3IKldpiTFf3153ea9zikQ=" crossorigin="anonymous"></script>
 
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@@ -38,7 +38,8 @@
 
 
 <!-- mathjax -->
-<script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
 
 <!--[if lt IE 9]>
 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -54,14 +55,15 @@
       <div class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="container">
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
+      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
+        <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">chemCal</a>
-        <span class="label label-default" data-toggle="tooltip" data-placement="bottom" title="Released package">0.2.1</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.2.2</span>
       </span>
     </div>
 
@@ -141,9 +143,8 @@
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.3.0.</p>
 </div>
-
       </footer>
    </div>
author	Johannes Ranke <jranke@uni-bremen.de>	2019-02-21 16:03:25 +0100
committer	Johannes Ranke <jranke@uni-bremen.de>	2019-02-21 16:03:25 +0100
commit	f55851e21d471a0ff1a4a72893374c30ca4cf819 (patch)
tree	9e72a99c7985ff6ecba45e209351d6b43bfcf286 /docs
parent	f8307bd495a0c687e51f600f2bc22f49f9eaccd8 (diff)