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<title>The maximum time weighted average concentration for a moving window — max_twa • pfm</title>

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    <h1>The maximum time weighted average concentration for a moving window</h1>
    </div>

    
    <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>
    

    <pre><span class='fu'>max_twa</span>(<span class='no'>x</span>, <span class='kw'>window</span> <span class='kw'>=</span> <span class='fl'>21</span>)</pre>
    
    <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a> Arguments</h2>
    <dl class="dl-horizontal">
      <dt>x</dt>
      <dd>An object of type <code><a href='one_box.html'>one_box</a></code></dd>
      <dt>window</dt>
      <dd>The size of the moving window</dd>
    </dl>
    
    <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>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>
    
    <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>

    <p>FOCUS (2006) &#8220;Guidance Document on Estimating Persistence and
  Degradation Kinetics from Environmental Fate Studies on Pesticides in EU
  Registration&#8221; 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'>http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics</a></p>
    
    <h2 class="hasAnchor" id="see-also"><a class="anchor" href="#see-also"></a>See also</h2>

    <p><code><a href='twa.html'>twa</a></code></p>
    

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
    <pre class="examples"><div class='input'><span class='no'>pred</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='sawtooth.html'>sawtooth</a></span>(<span class='fu'><a href='one_box.html'>one_box</a></span>(<span class='fl'>10</span>),
  <span class='kw'>applications</span> <span class='kw'>=</span> <span class='fu'>data.frame</span>(<span class='kw'>time</span> <span class='kw'>=</span> <span class='fu'>c</span>(<span class='fl'>0</span>, <span class='fl'>7</span>), <span class='kw'>amount</span> <span class='kw'>=</span> <span class='fu'>c</span>(<span class='fl'>1</span>, <span class='fl'>1</span>)))
<span class='fu'>max_twa</span>(<span class='no'>pred</span>)</div><div class='output co'>#&gt; $max
#&gt;    parent 
#&gt; 0.9537545 
#&gt; 
#&gt; $window_start
#&gt; parent 
#&gt;      0 
#&gt; 
#&gt; $window_end
#&gt; parent 
#&gt;     21 
#&gt; </div><div class='input'><span class='no'>pred_FOMC</span> <span class='kw'>&lt;-</span> <span class='fu'>mkinfit</span>(<span class='st'>"FOMC"</span>, <span class='no'>FOCUS_2006_C</span>, <span class='kw'>quiet</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
<span class='fu'>max_twa</span>(<span class='no'>pred_FOMC</span>)</div><div class='output co'>#&gt;       21 
#&gt; 18.22124 </div></pre>
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    <h2>Contents</h2>
    <ul class="nav nav-pills nav-stacked">
      <li><a href="#arguments">Arguments</a></li>
      
      <li><a href="#details">Details</a></li>

      <li><a href="#references">References</a></li>

      <li><a href="#see-also">See also</a></li>
      
      <li><a href="#examples">Examples</a></li>
    </ul>

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