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<!DOCTYPE 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>The maximum time weighted average concentration for a moving window — max_twa • pfm</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="The maximum time weighted average concentration for a moving window — max_twa"><meta property="og:description" content="If you generate your time series using sawtooth,
you need to make sure that the length of the time series allows
for finding the maximum. It is therefore recommended to check this using
plot.one_box using the window size for the argument
max_twa."><!-- 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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<h1>The maximum time weighted average concentration for a moving window</h1>
<div class="hidden name"><code>max_twa.Rd</code></div>
</div>
<div class="ref-description">
<p>If you generate your time series using <code><a href="sawtooth.html">sawtooth</a></code>,
you need to make sure that the length of the time series allows
for finding the maximum. It is therefore recommended to check this using
<code><a href="plot.one_box.html">plot.one_box</a></code> using the window size for the argument
<code>max_twa</code>.</p>
</div>
<div id="ref-usage">
<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">max_twa</span><span class="op">(</span><span class="va">x</span>, window <span class="op">=</span> <span class="fl">21</span><span class="op">)</span></span></code></pre></div>
</div>
<div id="arguments">
<h2>Arguments</h2>
<dl><dt>x</dt>
<dd><p>An object of type <code><a href="one_box.html">one_box</a></code></p></dd>
<dt>window</dt>
<dd><p>The size of the moving window</p></dd>
</dl></div>
<div id="details">
<h2>Details</h2>
<p>The method working directly on fitted <code>mkinfit</code> objects uses the
equations given in the PEC soil section of the FOCUS guidance and is restricted
SFO, FOMC and DFOP models and to the parent compound</p>
</div>
<div id="references">
<h2>References</h2>
<p>FOCUS (2006) “Guidance Document on Estimating Persistence and
Degradation Kinetics from Environmental Fate Studies on Pesticides in EU
Registration” Report of the FOCUS Work Group on Degradation Kinetics,
EC Document Reference Sanco/10058/2005 version 2.0, 434 pp,
<a href="http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics" class="external-link">http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics</a></p>
</div>
<div id="see-also">
<h2>See also</h2>
<div class="dont-index"><p><code><a href="twa.html">twa</a></code></p></div>
</div>
<div id="ref-examples">
<h2>Examples</h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="va">pred</span> <span class="op"><-</span> <span class="fu"><a href="sawtooth.html">sawtooth</a></span><span class="op">(</span><span class="fu"><a href="one_box.html">one_box</a></span><span class="op">(</span><span class="fl">10</span><span class="op">)</span>,</span></span>
<span class="r-in"><span> applications <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>time <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">0</span>, <span class="fl">7</span><span class="op">)</span>, amount <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">1</span>, <span class="fl">1</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu">max_twa</span><span class="op">(</span><span class="va">pred</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#></span> $max</span>
<span class="r-out co"><span class="r-pr">#></span> parent </span>
<span class="r-out co"><span class="r-pr">#></span> 0.9537545 </span>
<span class="r-out co"><span class="r-pr">#></span> </span>
<span class="r-out co"><span class="r-pr">#></span> $window_start</span>
<span class="r-out co"><span class="r-pr">#></span> parent </span>
<span class="r-out co"><span class="r-pr">#></span> 0 </span>
<span class="r-out co"><span class="r-pr">#></span> </span>
<span class="r-out co"><span class="r-pr">#></span> $window_end</span>
<span class="r-out co"><span class="r-pr">#></span> parent </span>
<span class="r-out co"><span class="r-pr">#></span> 21 </span>
<span class="r-out co"><span class="r-pr">#></span> </span>
<span class="r-in"><span><span class="va">pred_FOMC</span> <span class="op"><-</span> <span class="fu">mkinfit</span><span class="op">(</span><span class="st">"FOMC"</span>, <span class="va">FOCUS_2006_C</span>, quiet <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu">max_twa</span><span class="op">(</span><span class="va">pred_FOMC</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#></span> 21 </span>
<span class="r-out co"><span class="r-pr">#></span> 18.22124 </span>
</code></pre></div>
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