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<div class="title">std::chi_squared_distribution< _RealType > Class Template Reference<div class="ingroups"><a class="el" href="a01473.html">Numerics</a> » <a class="el" href="a01491.html">Random Number Generation</a> » <a class="el" href="a01532.html">Random Number Distributions</a> » <a class="el" href="a01534.html">Normal Distributions</a></div></div> </div>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="a06336.html">param_type</a></td></tr>
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Public Types</h2></td></tr>
<tr class="memitem:add3353e1e6f35655c681fe7de51ec8c1"><td class="memItemLeft" align="right" valign="top">typedef _RealType </td><td class="memItemRight" valign="bottom"><a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a></td></tr>
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Public Member Functions</h2></td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>chi_squared_distribution</b> (_RealType __n=_RealType(1))</td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>chi_squared_distribution</b> (const <a class="el" href="a06336.html">param_type</a> &__p)</td></tr>
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template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > </td></tr>
<tr class="memitem:af28d8b9192647e93d73b0ff7504cb61e"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><b>__generate</b> (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng)</td></tr>
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template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > </td></tr>
<tr class="memitem:a99ae483d7d5e438ef4319ebeff6e7ce7"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><b>__generate</b> (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng, const <a class="el" href="a06336.html">param_type</a> &__p)</td></tr>
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template<typename _UniformRandomNumberGenerator > </td></tr>
<tr class="memitem:a9cd05fcdb1a4d8b1ac695a0d54db12c1"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><b>__generate</b> (<a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a> *__f, <a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a> *__t, _UniformRandomNumberGenerator &__urng)</td></tr>
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template<typename _UniformRandomNumberGenerator > </td></tr>
<tr class="memitem:a3c1215364fe89965be10f08506030527"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><b>__generate</b> (<a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a> *__f, <a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a> *__t, _UniformRandomNumberGenerator &__urng, const <a class="el" href="a06336.html">param_type</a> &__p)</td></tr>
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_RealType </td><td class="memItemRight" valign="bottom"><b>n</b> () const</td></tr>
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<tr class="memitem:a2ddd460528095405f9ee56cf681f306a"><td class="memTemplParams" colspan="2">template<typename _UniformRandomNumberGenerator > </td></tr>
<tr class="memitem:a2ddd460528095405f9ee56cf681f306a"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a06332.html#add3353e1e6f35655c681fe7de51ec8c1">result_type</a> </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06332.html#a2ddd460528095405f9ee56cf681f306a">operator()</a> (_UniformRandomNumberGenerator &__urng)</td></tr>
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template<typename _UniformRandomNumberGenerator > </td></tr>
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<tr class="memitem:a97c1963c5d5cab27292ba7233cb54b5e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a06332.html#a97c1963c5d5cab27292ba7233cb54b5e">reset</a> ()</td></tr>
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Friends</h2></td></tr>
<tr class="memitem:aebe1b72f5b814d959f807aaaf5e6319e"><td class="memTemplParams" colspan="2">template<typename _RealType1 , typename _CharT , typename _Traits > </td></tr>
<tr class="memitem:aebe1b72f5b814d959f807aaaf5e6319e"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06332.html#aebe1b72f5b814d959f807aaaf5e6319e">operator<<</a> (<a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > &__os, const <a class="el" href="a06332.html">std::chi_squared_distribution</a>< _RealType1 > &__x)</td></tr>
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<tr class="memitem:a691feda4d6a0dec975dbe07c838768b6"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a06332.html#a691feda4d6a0dec975dbe07c838768b6">operator==</a> (const <a class="el" href="a06332.html">chi_squared_distribution</a> &__d1, const <a class="el" href="a06332.html">chi_squared_distribution</a> &__d2)</td></tr>
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<tr class="memitem:a5c7725e75b4c3fec1a13c3258ceaa6bc"><td class="memTemplParams" colspan="2">template<typename _RealType1 , typename _CharT , typename _Traits > </td></tr>
<tr class="memitem:a5c7725e75b4c3fec1a13c3258ceaa6bc"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a06332.html#a5c7725e75b4c3fec1a13c3258ceaa6bc">operator>></a> (<a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > &__is, <a class="el" href="a06332.html">std::chi_squared_distribution</a>< _RealType1 > &__x)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _RealType = double><br />
class std::chi_squared_distribution< _RealType ></h3>
<p>A chi_squared_distribution random number distribution. </p>
<p>The formula for the normal probability mass function is <img class="formulaInl" alt="$p(x|n) = \frac{x^{(n/2) - 1}e^{-x/2}}{\Gamma(n/2) 2^{n/2}}$" src="form_8.png"/> </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02574">2574</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
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template<typename _RealType = double> </div>
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<p>The type of the range of the distribution. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02577">2577</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ab4889a7bcb116a19e0815cf2fa250263">◆ </a></span>max()</h2>
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template<typename _RealType = double> </div>
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<p>Returns the least upper bound value of the distribution. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02664">2664</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
<p class="reference">References <a class="el" href="a00095_source.html#l00321">std::numeric_limits< _Tp >::max()</a>.</p>
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<p>Returns the greatest lower bound value of the distribution. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02657">2657</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a2ddd460528095405f9ee56cf681f306a">◆ </a></span>operator()()</h2>
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<p>Generating functions. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02672">2672</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<p>Returns the parameter set of the distribution. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02637">2637</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<p>Sets the parameter set of the distribution. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__param</td><td>The new parameter set of the distribution. </td></tr>
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</dd>
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<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02645">2645</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
<p class="reference">References <a class="el" href="a00452_source.html#l02444">std::gamma_distribution< _RealType >::param()</a>.</p>
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<a id="a97c1963c5d5cab27292ba7233cb54b5e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a97c1963c5d5cab27292ba7233cb54b5e">◆ </a></span>reset()</h2>
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template<typename _RealType = double> </div>
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<td class="memname">void <a class="el" href="a06332.html">std::chi_squared_distribution</a>< _RealType >::reset </td>
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<p>Resets the distribution state. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02623">2623</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
<p class="reference">References <a class="el" href="a00452_source.html#l02423">std::gamma_distribution< _RealType >::reset()</a>.</p>
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<h2 class="groupheader">Friends And Related Function Documentation</h2>
<a id="aebe1b72f5b814d959f807aaaf5e6319e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aebe1b72f5b814d959f807aaaf5e6319e">◆ </a></span>operator<<</h2>
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template<typename _RealType = double> </div>
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template<typename _RealType1 , typename _CharT , typename _Traits > </div>
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<td class="memname"><a class="el" href="a02460.html">std::basic_ostream</a><_CharT, _Traits>& operator<< </td>
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<td class="paramtype"><a class="el" href="a02460.html">std::basic_ostream</a>< _CharT, _Traits > & </td>
<td class="paramname"><em>__os</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="a06332.html">std::chi_squared_distribution</a>< _RealType1 > & </td>
<td class="paramname"><em>__x</em> </td>
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<td></td>
<td>)</td>
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<span class="mlabels"><span class="mlabel">friend</span></span> </td>
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<p>Inserts a chi_squared_distribution random number distribution <code>__x</code> into the output stream <code>__os</code>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__os</td><td>An output stream. </td></tr>
<tr><td class="paramname">__x</td><td>A chi_squared_distribution random number distribution.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The output stream with the state of <code>__x</code> inserted or in an error state. </dd></dl>
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<a id="a691feda4d6a0dec975dbe07c838768b6"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a691feda4d6a0dec975dbe07c838768b6">◆ </a></span>operator==</h2>
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template<typename _RealType = double> </div>
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<td class="memname">bool operator== </td>
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<td class="paramtype">const <a class="el" href="a06332.html">chi_squared_distribution</a>< _RealType > & </td>
<td class="paramname"><em>__d1</em>, </td>
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<td class="paramtype">const <a class="el" href="a06332.html">chi_squared_distribution</a>< _RealType > & </td>
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<p>Return true if two Chi-squared distributions have the same parameters and the sequences that would be generated are equal. </p>
<p class="definition">Definition at line <a class="el" href="a00452_source.html#l02723">2723</a> of file <a class="el" href="a00452_source.html">random.h</a>.</p>
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<a id="a5c7725e75b4c3fec1a13c3258ceaa6bc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5c7725e75b4c3fec1a13c3258ceaa6bc">◆ </a></span>operator>></h2>
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template<typename _RealType = double> </div>
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template<typename _RealType1 , typename _CharT , typename _Traits > </div>
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<td class="memname"><a class="el" href="a02456.html">std::basic_istream</a><_CharT, _Traits>& operator>> </td>
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<td class="paramtype"><a class="el" href="a02456.html">std::basic_istream</a>< _CharT, _Traits > & </td>
<td class="paramname"><em>__is</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a06332.html">std::chi_squared_distribution</a>< _RealType1 > & </td>
<td class="paramname"><em>__x</em> </td>
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<p>Extracts a chi_squared_distribution random number distribution <code>__x</code> from the input stream <code>__is</code>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__is</td><td>An input stream. </td></tr>
<tr><td class="paramname">__x</td><td>A chi_squared_distribution random number generator engine.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The input stream with <code>__x</code> extracted or in an error state. </dd></dl>
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</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a00452_source.html">random.h</a></li>
<li><a class="el" href="a17055_source.html">bits/random.tcc</a></li>
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