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<div class="refentry" title="Struct template weighted_density_impl">
<a name="boost.accumulators.impl.weighted_density_impl"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Struct template weighted_density_impl</span></h2>
<p>boost::accumulators::impl::weighted_density_impl — Histogram density estimator for weighted samples. </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="emphasis"><em>// In header: <<a class="link" href="../../../accumulators/reference.html#header.boost.accumulators.statistics.weighted_density_hpp" title="Header <boost/accumulators/statistics/weighted_density.hpp>">boost/accumulators/statistics/weighted_density.hpp</a>>
</em></span><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Sample, <span class="bold"><strong>typename</strong></span> Weight>
<span class="bold"><strong>struct</strong></span> <a class="link" href="weighted_density_impl.html" title="Struct template weighted_density_impl">weighted_density_impl</a> {
<span class="emphasis"><em>// types</em></span>
<span class="bold"><strong>typedef</strong></span> numeric::functional::average< Weight, std::size_t >::result_type <a name="boost.accumulators.impl.weighted_density_impl.float_type"></a>float_type;
<span class="bold"><strong>typedef</strong></span> std::vector< std::pair< float_type, float_type > > <a name="boost.accumulators.impl.weighted_density_impl.histogram_type"></a>histogram_type;
<span class="bold"><strong>typedef</strong></span> std::vector< float_type > <a name="boost.accumulators.impl.weighted_density_impl.array_type"></a>array_type;
<span class="bold"><strong>typedef</strong></span> iterator_range< <span class="bold"><strong>typename</strong></span> histogram_type::iterator > <a name="boost.accumulators.impl.weighted_density_impl.result_type"></a>result_type;
<span class="emphasis"><em>// <a class="link" href="weighted_density_impl.html#boost.accumulators.impl.weighted_density_implconstruct-copy-destruct">construct/copy/destruct</a></em></span>
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <a class="link" href="weighted_density_impl.html#id562061-bb">weighted_density_impl</a>(Args <span class="bold"><strong>const</strong></span> &);
<span class="emphasis"><em>// <a class="link" href="weighted_density_impl.html#id562017-bb">public member functions</a></em></span>
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <span class="type"><span class="bold"><strong>void</strong></span></span> <a class="link" href="weighted_density_impl.html#id562020-bb"><span class="bold"><strong>operator</strong></span>()</a>(Args <span class="bold"><strong>const</strong></span> &) ;
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <span class="type">result_type</span> <a class="link" href="weighted_density_impl.html#id562041-bb">result</a>(Args <span class="bold"><strong>const</strong></span> &) <span class="bold"><strong>const</strong></span>;
};</pre></div>
<div class="refsect1" title="Description">
<a name="id687496"></a><h2>Description</h2>
<p>The histogram density estimator returns a histogram of the sample distribution. The positions and sizes of the bins are determined using a specifiable number of cached samples (cache_size). The range between the minimum and the maximum of the cached samples is subdivided into a specifiable number of bins (num_bins) of same size. Additionally, an under- and an overflow bin is added to capture future under- and overflow samples. Once the bins are determined, the cached samples and all subsequent samples are added to the correct bins. At the end, a range of std::pair is returned, where each pair contains the position of the bin (lower bound) and the sum of the weights (normalized with the sum of all weights).</p>
<p>
</p>
<div class="refsect2" title="weighted_density_impl public construct/copy/destruct">
<a name="id687503"></a><h3>
<a name="boost.accumulators.impl.weighted_density_implconstruct-copy-destruct"></a><code class="computeroutput">weighted_density_impl</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <a name="id562061-bb"></a>weighted_density_impl(Args <span class="bold"><strong>const</strong></span> & args);</pre></li></ol></div>
</div>
<div class="refsect2" title="weighted_density_impl public member functions">
<a name="id687556"></a><h3>
<a name="id562017-bb"></a><code class="computeroutput">weighted_density_impl</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <span class="type"><span class="bold"><strong>void</strong></span></span> <a name="id562020-bb"></a><span class="bold"><strong>operator</strong></span>()(Args <span class="bold"><strong>const</strong></span> & args) ;</pre></li>
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Args> <span class="type">result_type</span> <a name="id562041-bb"></a>result(Args <span class="bold"><strong>const</strong></span> & args) <span class="bold"><strong>const</strong></span>;</pre></li>
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<td align="right"><div class="copyright-footer">Copyright © 2005, 2006 Eric Niebler<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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