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<img src="" class="logo" alt=""><h1>The maximum time weighted average concentration for a moving window</h1>
<small class="dont-index">Source: <a href="https://github.com/jranke/pfm/blob/HEAD/R/twa.R" class="external-link"><code>R/twa.R</code></a></small>
<div class="d-none name"><code>max_twa.Rd</code></div>
</div>
<div class="ref-description section level2">
<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 class="section level2">
<h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
<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 class="section level2">
<h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></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 class="section level2">
<h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></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 class="section level2">
<h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></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 class="section level2">
<h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
<div class="dont-index"><p><code><a href="twa.html">twa</a></code></p></div>
</div>
<div class="section level2">
<h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></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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