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<img src="" class="logo" alt=""><h1>Calculate a time weighted average concentration</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>twa.Rd</code></div>
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<div class="ref-description section level2">
<p>The moving average is built only using the values in the past, so
the earliest possible time for the maximum in the time series returned
is after one window has passed.</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">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>
<span></span>
<span><span class="co"># S3 method for one_box</span></span>
<span><span class="fu">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="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
<div class="dont-index"><p><code><a href="max_twa.html">max_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"><a href="max_twa.html">max_twa</a></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>
</code></pre></div>
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