aboutsummaryrefslogtreecommitdiff
path: root/docs/dev/reference/add_err.html
diff options
context:
space:
mode:
Diffstat (limited to 'docs/dev/reference/add_err.html')
-rw-r--r--docs/dev/reference/add_err.html287
1 files changed, 287 insertions, 0 deletions
diff --git a/docs/dev/reference/add_err.html b/docs/dev/reference/add_err.html
new file mode 100644
index 00000000..a4317cd7
--- /dev/null
+++ b/docs/dev/reference/add_err.html
@@ -0,0 +1,287 @@
+<!-- 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>Add normally distributed errors to simulated kinetic degradation data — add_err • mkin</title>
+
+
+<!-- jquery -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
+<!-- Bootstrap -->
+
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
+
+<!-- bootstrap-toc -->
+<link rel="stylesheet" href="../bootstrap-toc.css">
+<script src="../bootstrap-toc.js"></script>
+
+<!-- Font Awesome icons -->
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous" />
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous" />
+
+<!-- clipboard.js -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script>
+
+<!-- headroom.js -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script>
+
+<!-- pkgdown -->
+<link href="../pkgdown.css" rel="stylesheet">
+<script src="../pkgdown.js"></script>
+
+
+
+
+<meta property="og:title" content="Add normally distributed errors to simulated kinetic degradation data — add_err" />
+<meta property="og:description" content="Normally distributed errors are added to data predicted for a specific
+degradation model using mkinpredict. The variance of the error
+may depend on the predicted value and is specified as a standard deviation." />
+
+
+<meta name="robots" content="noindex">
+
+<!-- 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 data-spy="scroll" data-target="#toc">
+ <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">mkin</a>
+ <span class="version label label-danger" data-toggle="tooltip" data-placement="bottom" title="In-development version">0.9.50.3</span>
+ </span>
+ </div>
+
+ <div id="navbar" class="navbar-collapse collapse">
+ <ul class="nav navbar-nav">
+ <li>
+ <a href="../reference/index.html">Functions and data</a>
+</li>
+<li class="dropdown">
+ <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
+ Articles
+
+ <span class="caret"></span>
+ </a>
+ <ul class="dropdown-menu" role="menu">
+ <li>
+ <a href="../articles/mkin.html">Introduction to mkin</a>
+ </li>
+ <li>
+ <a href="../articles/FOCUS_D.html">Example evaluation of FOCUS Example Dataset D</a>
+ </li>
+ <li>
+ <a href="../articles/FOCUS_L.html">Example evaluation of FOCUS Laboratory Data L1 to L3</a>
+ </li>
+ <li>
+ <a href="../articles/web_only/FOCUS_Z.html">Example evaluation of FOCUS Example Dataset Z</a>
+ </li>
+ <li>
+ <a href="../articles/web_only/compiled_models.html">Performance benefit by using compiled model definitions in mkin</a>
+ </li>
+ <li>
+ <a href="../articles/twa.html">Calculation of time weighted average concentrations with mkin</a>
+ </li>
+ <li>
+ <a href="../articles/web_only/NAFTA_examples.html">Example evaluation of NAFTA SOP Attachment examples</a>
+ </li>
+ <li>
+ <a href="../articles/web_only/benchmarks.html">Some benchmark timings</a>
+ </li>
+ </ul>
+</li>
+<li>
+ <a href="../news/index.html">News</a>
+</li>
+ </ul>
+ <ul class="nav navbar-nav navbar-right">
+ <li>
+ <a href="http://github.com/jranke/mkin/">
+ <span class="fab fa fab fa-github fa-lg"></span>
+
+ </a>
+</li>
+ </ul>
+
+ </div><!--/.nav-collapse -->
+ </div><!--/.container -->
+</div><!--/.navbar -->
+
+
+
+ </header>
+
+<div class="row">
+ <div class="col-md-9 contents">
+ <div class="page-header">
+ <h1>Add normally distributed errors to simulated kinetic degradation data</h1>
+ <small class="dont-index">Source: <a href='http://github.com/jranke/mkin/blob/master/R/add_err.R'><code>R/add_err.R</code></a></small>
+ <div class="hidden name"><code>add_err.Rd</code></div>
+ </div>
+
+ <div class="ref-description">
+ <p>Normally distributed errors are added to data predicted for a specific
+degradation model using <code><a href='mkinpredict.html'>mkinpredict</a></code>. The variance of the error
+may depend on the predicted value and is specified as a standard deviation.</p>
+ </div>
+
+ <pre class="usage"><span class='fu'>add_err</span>(
+ <span class='no'>prediction</span>,
+ <span class='no'>sdfunc</span>,
+ <span class='kw'>secondary</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"M1"</span>, <span class='st'>"M2"</span>),
+ <span class='kw'>n</span> <span class='kw'>=</span> <span class='fl'>1000</span>,
+ <span class='kw'>LOD</span> <span class='kw'>=</span> <span class='fl'>0.1</span>,
+ <span class='kw'>reps</span> <span class='kw'>=</span> <span class='fl'>2</span>,
+ <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>1</span>,
+ <span class='kw'>seed</span> <span class='kw'>=</span> <span class='fl'>NA</span>
+)</pre>
+
+ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
+ <table class="ref-arguments">
+ <colgroup><col class="name" /><col class="desc" /></colgroup>
+ <tr>
+ <th>prediction</th>
+ <td><p>A prediction from a kinetic model as produced by
+<code><a href='mkinpredict.html'>mkinpredict</a></code>.</p></td>
+ </tr>
+ <tr>
+ <th>sdfunc</th>
+ <td><p>A function taking the predicted value as its only argument and
+returning a standard deviation that should be used for generating the
+random error terms for this value.</p></td>
+ </tr>
+ <tr>
+ <th>secondary</th>
+ <td><p>The names of state variables that should have an initial
+value of zero</p></td>
+ </tr>
+ <tr>
+ <th>n</th>
+ <td><p>The number of datasets to be generated.</p></td>
+ </tr>
+ <tr>
+ <th>LOD</th>
+ <td><p>The limit of detection (LOD). Values that are below the LOD after
+adding the random error will be set to NA.</p></td>
+ </tr>
+ <tr>
+ <th>reps</th>
+ <td><p>The number of replicates to be generated within the datasets.</p></td>
+ </tr>
+ <tr>
+ <th>digits</th>
+ <td><p>The number of digits to which the values will be rounded.</p></td>
+ </tr>
+ <tr>
+ <th>seed</th>
+ <td><p>The seed used for the generation of random numbers. If NA, the
+seed is not set.</p></td>
+ </tr>
+ </table>
+
+ <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
+
+ <p>A list of datasets compatible with <code><a href='mmkin.html'>mmkin</a></code>, i.e. the
+components of the list are datasets compatible with <code><a href='mkinfit.html'>mkinfit</a></code>.</p>
+ <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>
+
+ <p>Ranke J and Lehmann R (2015) To t-test or not to t-test, that is
+the question. XV Symposium on Pesticide Chemistry 2-4 September 2015,
+Piacenza, Italy
+https://jrwb.de/posters/piacenza_2015.pdf</p>
+
+ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
+ <pre class="examples"><div class='input'>
+<span class='co'># The kinetic model</span>
+<span class='no'>m_SFO_SFO</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='mkinmod.html'>mkinmod</a></span>(<span class='kw'>parent</span> <span class='kw'>=</span> <span class='fu'><a href='mkinsub.html'>mkinsub</a></span>(<span class='st'>"SFO"</span>, <span class='st'>"M1"</span>),
+ <span class='kw'>M1</span> <span class='kw'>=</span> <span class='fu'><a href='mkinsub.html'>mkinsub</a></span>(<span class='st'>"SFO"</span>), <span class='kw'>use_of_ff</span> <span class='kw'>=</span> <span class='st'>"max"</span>)</div><div class='output co'>#&gt; <span class='message'>Successfully compiled differential equation model from auto-generated C code.</span></div><div class='input'>
+<span class='co'># Generate a prediction for a specific set of parameters</span>
+<span class='no'>sampling_times</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>0</span>, <span class='fl'>1</span>, <span class='fl'>3</span>, <span class='fl'>7</span>, <span class='fl'>14</span>, <span class='fl'>28</span>, <span class='fl'>60</span>, <span class='fl'>90</span>, <span class='fl'>120</span>)
+
+<span class='co'># This is the prediction used for the "Type 2 datasets" on the Piacenza poster</span>
+<span class='co'># from 2015</span>
+<span class='no'>d_SFO_SFO</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='mkinpredict.html'>mkinpredict</a></span>(<span class='no'>m_SFO_SFO</span>,
+ <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='kw'>k_parent</span> <span class='kw'>=</span> <span class='fl'>0.1</span>, <span class='kw'>f_parent_to_M1</span> <span class='kw'>=</span> <span class='fl'>0.5</span>,
+ <span class='kw'>k_M1</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/Log.html'>log</a></span>(<span class='fl'>2</span>)/<span class='fl'>1000</span>),
+ <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='kw'>parent</span> <span class='kw'>=</span> <span class='fl'>100</span>, <span class='kw'>M1</span> <span class='kw'>=</span> <span class='fl'>0</span>),
+ <span class='no'>sampling_times</span>)
+
+<span class='co'># Add an error term with a constant (independent of the value) standard deviation</span>
+<span class='co'># of 10, and generate three datasets</span>
+<span class='no'>d_SFO_SFO_err</span> <span class='kw'>&lt;-</span> <span class='fu'>add_err</span>(<span class='no'>d_SFO_SFO</span>, <span class='kw'>function</span>(<span class='no'>x</span>) <span class='fl'>10</span>, <span class='kw'>n</span> <span class='kw'>=</span> <span class='fl'>3</span>, <span class='kw'>seed</span> <span class='kw'>=</span> <span class='fl'>123456789</span> )
+
+<span class='co'># Name the datasets for nicer plotting</span>
+<span class='fu'><a href='https://rdrr.io/r/base/names.html'>names</a></span>(<span class='no'>d_SFO_SFO_err</span>) <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste</a></span>(<span class='st'>"Dataset"</span>, <span class='fl'>1</span>:<span class='fl'>3</span>)
+
+<span class='co'># Name the model in the list of models (with only one member in this case) for</span>
+<span class='co'># nicer plotting later on. Be quiet and use only one core not to offend CRAN</span>
+<span class='co'># checks</span>
+<span class='co'># \dontrun{</span>
+<span class='no'>f_SFO_SFO</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='mmkin.html'>mmkin</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span>(<span class='st'>"SFO-SFO"</span> <span class='kw'>=</span> <span class='no'>m_SFO_SFO</span>),
+ <span class='no'>d_SFO_SFO_err</span>, <span class='kw'>cores</span> <span class='kw'>=</span> <span class='fl'>1</span>,
+ <span class='kw'>quiet</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
+
+<span class='fu'><a href='https://rdrr.io/r/base/plot.html'>plot</a></span>(<span class='no'>f_SFO_SFO</span>)</div><div class='img'><img src='add_err-1.png' alt='' width='700' height='433' /></div><div class='input'>
+<span class='co'># We would like to inspect the fit for dataset 3 more closely</span>
+<span class='co'># Using double brackets makes the returned object an mkinfit object</span>
+<span class='co'># instead of a list of mkinfit objects, so plot.mkinfit is used</span>
+<span class='fu'><a href='https://rdrr.io/r/base/plot.html'>plot</a></span>(<span class='no'>f_SFO_SFO</span><span class='kw'>[[</span><span class='fl'>3</span>]], <span class='kw'>show_residuals</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</div><div class='img'><img src='add_err-2.png' alt='' width='700' height='433' /></div><div class='input'>
+<span class='co'># If we use single brackets, we should give two indices (model and dataset),</span>
+<span class='co'># and plot.mmkin is used</span>
+<span class='fu'><a href='https://rdrr.io/r/base/plot.html'>plot</a></span>(<span class='no'>f_SFO_SFO</span>[<span class='fl'>1</span>, <span class='fl'>3</span>])</div><div class='img'><img src='add_err-3.png' alt='' width='700' height='433' /></div><div class='input'># }
+
+</div></pre>
+ </div>
+ <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
+ <nav id="toc" data-toggle="toc" class="sticky-top">
+ <h2 data-toc-skip>Contents</h2>
+ </nav>
+ </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> 1.5.1.</p>
+</div>
+
+ </footer>
+ </div>
+
+
+
+
+ </body>
+</html>
+
+

Contact - Imprint