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<img src="" class="logo" alt=""><h1>Create a time series of decline data</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>one_box.Rd</code></div>
</div>
<div class="ref-description section level2">
<p>Create a time series of decline data</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">one_box</span><span class="op">(</span><span class="va">x</span>, <span class="va">ini</span>, <span class="va">...</span>, t_end <span class="op">=</span> <span class="fl">100</span>, res <span class="op">=</span> <span class="fl">0.01</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for numeric</span></span>
<span><span class="fu">one_box</span><span class="op">(</span><span class="va">x</span>, ini <span class="op">=</span> <span class="fl">1</span>, <span class="va">...</span>, t_end <span class="op">=</span> <span class="fl">100</span>, res <span class="op">=</span> <span class="fl">0.01</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for character</span></span>
<span><span class="fu">one_box</span><span class="op">(</span><span class="va">x</span>, ini <span class="op">=</span> <span class="fl">1</span>, <span class="va">parms</span>, <span class="va">...</span>, t_end <span class="op">=</span> <span class="fl">100</span>, res <span class="op">=</span> <span class="fl">0.01</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for mkinfit</span></span>
<span><span class="fu">one_box</span><span class="op">(</span><span class="va">x</span>, ini <span class="op">=</span> <span class="st">"model"</span>, <span class="va">...</span>, t_end <span class="op">=</span> <span class="fl">100</span>, res <span class="op">=</span> <span class="fl">0.01</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>When numeric, this is the half-life to be used for an exponential
decline. When a character string specifying a parent decline model is given
e.g. <code>FOMC</code>, <code>parms</code> must contain the corresponding parameters.
If x is an <code><a href="https://pkgdown.jrwb.de/mkin/reference/mkinfit.html" class="external-link">mkinfit</a></code> object, the decline is calculated from this
object.</p></dd>
<dt>ini</dt>
<dd><p>The initial amount. If x is an <code><a href="https://pkgdown.jrwb.de/mkin/reference/mkinfit.html" class="external-link">mkinfit</a></code> object, and
ini is 'model', the fitted initial concentrations are used. Otherwise, ini
must be numeric. If it has length one, it is used for the parent and
initial values of metabolites are zero, otherwise, it must give values for
all observed variables.</p></dd>
<dt>...</dt>
<dd><p>Further arguments passed to methods</p></dd>
<dt>t_end</dt>
<dd><p>End of the time series</p></dd>
<dt>res</dt>
<dd><p>Resolution of the time series</p></dd>
<dt>parms</dt>
<dd><p>A named numeric vector containing the model parameters</p></dd>
</dl></div>
<div class="section level2">
<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
<p>An object of class <code>one_box</code>, inheriting from <code><a href="https://rdrr.io/r/stats/ts.html" class="external-link">ts</a></code>.</p>
</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="co"># Only use a half-life</span></span></span>
<span class="r-in"><span><span class="va">pred_0</span> <span class="op"><-</span> <span class="fu">one_box</span><span class="op">(</span><span class="fl">10</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">pred_0</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="one_box-1.png" alt="" width="700" height="433"></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Use a fitted mkinfit model</span></span></span>
<span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">require</a></span><span class="op">(</span><span class="va"><a href="https://pkgdown.jrwb.de/mkin/" class="external-link">mkin</a></span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">fit</span> <span class="op"><-</span> <span class="fu"><a href="https://pkgdown.jrwb.de/mkin/reference/mkinfit.html" class="external-link">mkinfit</a></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="va">pred_1</span> <span class="op"><-</span> <span class="fu">one_box</span><span class="op">(</span><span class="va">fit</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">pred_1</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="one_box-2.png" alt="" width="700" height="433"></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Use a model with more than one observed variable</span></span></span>
<span class="r-in"><span><span class="va">m_2</span> <span class="op"><-</span> <span class="fu"><a href="https://pkgdown.jrwb.de/mkin/reference/mkinmod.html" class="external-link">mkinmod</a></span><span class="op">(</span>parent <span class="op">=</span> <span class="fu"><a href="https://pkgdown.jrwb.de/mkin/reference/mkinmod.html" class="external-link">mkinsub</a></span><span class="op">(</span><span class="st">"SFO"</span>, <span class="st">"m1"</span><span class="op">)</span>, m1 <span class="op">=</span> <span class="fu"><a href="https://pkgdown.jrwb.de/mkin/reference/mkinmod.html" class="external-link">mkinsub</a></span><span class="op">(</span><span class="st">"SFO"</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-msg co"><span class="r-pr">#></span> Temporary DLL for differentials generated and loaded</span>
<span class="r-in"><span><span class="va">fit_2</span> <span class="op"><-</span> <span class="fu"><a href="https://pkgdown.jrwb.de/mkin/reference/mkinfit.html" class="external-link">mkinfit</a></span><span class="op">(</span><span class="va">m_2</span>, <span class="va">FOCUS_2006_D</span>, quiet <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span></span>
<span class="r-wrn co"><span class="r-pr">#></span> <span class="warning">Warning: </span>Observations with value of zero were removed from the data</span>
<span class="r-in"><span><span class="va">pred_2</span> <span class="op"><-</span> <span class="fu">one_box</span><span class="op">(</span><span class="va">fit_2</span>, ini <span class="op">=</span> <span class="st">"model"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">pred_2</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="one_box-3.png" alt="" width="700" height="433"></span>
</code></pre></div>
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