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<h2><span class="refentrytitle">Struct template weighted_tail_quantile_impl</span></h2>
<p>boost::accumulators::impl::weighted_tail_quantile_impl &#8212; Tail quantile estimation based on order statistics of weighted samples (for both left and right tails). </p>
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<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="comment">// In header: &lt;<a class="link" href="../../../document_to_test_formatting/accumulators.html#header.doc.test.weighted_tail_quantile_hpp" title="Header &lt;doc/test/weighted_tail_quantile.hpp&gt;">doc/test/weighted_tail_quantile.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Sample<span class="special">,</span> <span class="keyword">typename</span> Weight<span class="special">,</span> <span class="keyword">typename</span> LeftRight<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="weighted_tail_quantile__id330053.html" title="Struct template weighted_tail_quantile_impl">weighted_tail_quantile_impl</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">numeric</span><span class="special">::</span><span class="identifier">functional</span><span class="special">::</span><span class="identifier">average</span><span class="special">&lt;</span> <span class="identifier">Weight</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">result_type</span> <a name="boost.accumulators.impl.weighted_tail_quantile__id330053.float_type"></a><span class="identifier">float_type</span><span class="special">;</span> 
  <span class="keyword">typedef</span> <span class="identifier">Sample</span>                                                           <a name="boost.accumulators.impl.weighted_tail_quantile__id330053.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="weighted_tail_quantile__id330053.html#boost.accumulators.impl.weighted_tail_quantile__id330053construct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="weighted_tail_quantile__id330053.html#id330297-bb"><span class="identifier">weighted_tail_quantile_impl</span></a><span class="special">(</span><span class="identifier">dont_care</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="weighted_tail_quantile__id330053.html#id330273-bb">public member functions</a></span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Args<span class="special">&gt;</span> <span class="identifier">result_type</span> <a class="link" href="weighted_tail_quantile__id330053.html#id330277-bb"><span class="identifier">result</span></a><span class="special">(</span><span class="identifier">Args</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id779890"></a><h2>Description</h2>
<p>An estimator <span class="inlinemediaobject"><img src="../../../images/accumulators/form_0.png"></span> of tail quantiles with level <span class="inlinemediaobject"><img src="../../../images/accumulators/form_1.png"></span> based on order statistics <span class="inlinemediaobject"><img src="../../../images/accumulators/form_2.png"></span> of weighted samples are given by <span class="inlinemediaobject"><img src="../../../images/accumulators/form_3.png"></span> (left tail) and <span class="inlinemediaobject"><img src="../../../images/accumulators/form_4.png"></span> (right tail), where</p>
<div class="equation">
<a name="id779998"></a><p class="title"><b>Equation&#160;1.&#160;</b></p>
<div class="equation-contents"><div class="mediaobject" align="center"><img src="../../../images/accumulators/form_5.png" align="middle"></div></div>
</div>
<p><br class="equation-break"></p>
<p>and</p>
<div class="equation">
<a name="id780026"></a><p class="title"><b>Equation&#160;2.&#160;</b></p>
<div class="equation-contents"><div class="mediaobject" align="center"><img src="../../../images/accumulators/form_6.png" align="middle"></div></div>
</div>
<p><br class="equation-break"></p>
<p><span class="inlinemediaobject"><img src="../../../images/accumulators/form_7.png"></span> being the number of samples and <span class="inlinemediaobject"><img src="../../../images/accumulators/form_8.png"></span> the sum of all weights.</p>
<p>
</p>
<div class="refsect2">
<a name="id780095"></a><h3>
<a name="boost.accumulators.impl.weighted_tail_quantile__id330053construct-copy-destruct"></a><code class="computeroutput">weighted_tail_quantile_impl</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><a name="id330297-bb"></a><span class="identifier">weighted_tail_quantile_impl</span><span class="special">(</span><span class="identifier">dont_care</span><span class="special">)</span><span class="special">;</span></pre></li></ol></div>
</div>
<div class="refsect2">
<a name="id780149"></a><h3>
<a name="id330273-bb"></a><code class="computeroutput">weighted_tail_quantile_impl</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Args<span class="special">&gt;</span> <span class="identifier">result_type</span> <a name="id330277-bb"></a><span class="identifier">result</span><span class="special">(</span><span class="identifier">Args</span> <span class="keyword">const</span> <span class="special">&amp;</span> args<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li></ol></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 John Maddock, Joel de Guzman, Eric Niebler and Matias
      Capeletto<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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