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<title>Class template negative_binomial_distribution</title>
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<a name="boost.random.negative_binomial_distr_id1251245"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template negative_binomial_distribution</span></h2>
<p>boost::random::negative_binomial_distribution</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="comment">// In header: &lt;<a class="link" href="../../boost_random/reference.html#header.boost.random.negative_binomial_distribution_hpp" title="Header &lt;boost/random/negative_binomial_distribution.hpp&gt;">boost/random/negative_binomial_distribution.hpp</a>&gt;
</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> IntType <span class="special">=</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">typename</span> RealType <span class="special">=</span> <span class="keyword">double</span><span class="special">&gt;</span>
<span class="keyword">class</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="identifier">IntType</span> <a name="boost.random.negative_binomial_distr_id1251245.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">RealType</span> <a name="boost.random.negative_binomial_distr_id1251245.input_type"></a><span class="identifier">input_type</span><span class="special">;</span>
<span class="comment">// member classes/structs/unions</span>
<span class="keyword">class</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#boost.random.negative_binomial_distr_id1251245.param_type.distribution_type"><span class="identifier">distribution_type</span></a><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245/param_type.html#boost.random.negative_binomial_distr_id1251245.param_typeconstruct-copy-destruct">construct/copy/destruct</a></span>
<span class="keyword">explicit</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251350-bb"><span class="identifier">param_type</span></a><span class="special">(</span><span class="identifier">IntType</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">RealType</span> <span class="special">=</span> <span class="number">0</span><span class="special">.</span><span class="number">5</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251316-bb">public member functions</a></span>
<span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251319-bb"><span class="identifier">k</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">RealType</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251334-bb"><span class="identifier">p</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251390-bb">friend functions</a></span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251393-bb"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251436-bb"><span class="keyword">operator</span><span class="special">&gt;&gt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251478-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html#id1251509-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245.html#boost.random.negative_binomial_distr_id1251245construct-copy-destruct">construct/copy/destruct</a></span>
<span class="keyword">explicit</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251720-bb"><span class="identifier">negative_binomial_distribution</span></a><span class="special">(</span><span class="identifier">IntType</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">RealType</span> <span class="special">=</span> <span class="number">0</span><span class="special">.</span><span class="number">5</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251761-bb"><span class="identifier">negative_binomial_distribution</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245.html#id1251551-bb">public member functions</a></span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span> <span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251554-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">URNG</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span> <span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251579-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">URNG</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251618-bb"><span class="identifier">k</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">RealType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251633-bb"><span class="identifier">p</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251649-bb"><span class="identifier">min</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">IntType</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251661-bb"><span class="identifier">max</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <a class="link" href="negative_binomial_distr_id1251245.html#id1251673-bb"><span class="identifier">param</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251686-bb"><span class="identifier">param</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251707-bb"><span class="identifier">reset</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="negative_binomial_distr_id1251245.html#id1251785-bb">friend functions</a></span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a class="link" href="negative_binomial_distr_id1251245.html#id1251788-bb"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a class="link" href="negative_binomial_distr_id1251245.html#id1251832-bb"><span class="keyword">operator</span><span class="special">&gt;&gt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251874-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="negative_binomial_distr_id1251245.html#id1251906-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id2719072"></a><h2>Description</h2>
<p>The negative binomial distribution is an integer valued distribution with two parameters, <code class="computeroutput">k</code> and <code class="computeroutput">p</code>. The distribution produces non-negative values.</p>
<p>The distribution function is <span class="inlinemediaobject"><img src="../../images/random/form_15.png"></span>.</p>
<p>This implementation uses a gamma-poisson mixture. </p>
<div class="refsect2">
<a name="id2719118"></a><h3>
<a name="boost.random.negative_binomial_distr_id1251245construct-copy-destruct"></a><code class="computeroutput">negative_binomial_distribution</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="id1251720-bb"></a><span class="identifier">negative_binomial_distribution</span><span class="special">(</span><span class="identifier">IntType</span> k <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">RealType</span> p <span class="special">=</span> <span class="number">0</span><span class="special">.</span><span class="number">5</span><span class="special">)</span><span class="special">;</span></pre>
<p>Construct a <code class="computeroutput"><code class="computeroutput"><a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a></code></code> object. <code class="computeroutput">k</code> and <code class="computeroutput">p</code> are the parameters of the distribution.</p>
<p>Requires: k &gt;=0 &amp;&amp; 0 &lt;= p &lt;= 1 </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="id1251761-bb"></a><span class="identifier">negative_binomial_distribution</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span> param<span class="special">)</span><span class="special">;</span></pre>
<p>Construct an <code class="computeroutput"><code class="computeroutput"><a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a></code></code> object from the parameters. </p>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="id2719324"></a><h3>
<a name="id1251551-bb"></a><code class="computeroutput">negative_binomial_distribution</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> URNG<span class="special">&gt;</span> <span class="identifier">IntType</span> <a name="id1251554-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">URNG</span> <span class="special">&amp;</span> urng<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns a random variate distributed according to the negative binomial distribution. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span>
<span class="identifier">IntType</span> <a name="id1251579-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">URNG</span> <span class="special">&amp;</span> urng<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span> param<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns a random variate distributed according to the negative binomial distribution with parameters specified by <code class="computeroutput">param</code>. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">IntType</span> <a name="id1251618-bb"></a><span class="identifier">k</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns the <code class="computeroutput">k</code> parameter of the distribution. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">RealType</span> <a name="id1251633-bb"></a><span class="identifier">p</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns the <code class="computeroutput">p</code> parameter of the distribution. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">IntType</span> <a name="id1251649-bb"></a><span class="identifier">min</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns the smallest value that the distribution can produce. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">IntType</span> <a name="id1251661-bb"></a><span class="identifier">max</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns the largest value that the distribution can produce. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <a name="id1251673-bb"></a><span class="identifier">param</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns the parameters of the distribution. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="id1251686-bb"></a><span class="identifier">param</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span> param<span class="special">)</span><span class="special">;</span></pre>
<p>Sets parameters of the distribution. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="id1251707-bb"></a><span class="identifier">reset</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset. </p>
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<div class="refsect2">
<a name="id2719867"></a><h3>
<a name="id1251785-bb"></a><code class="computeroutput">negative_binomial_distribution</code> friend functions</h3>
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<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a name="id1251788-bb"></a><span class="keyword">operator</span><span class="special">&lt;&lt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span> os<span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> bd<span class="special">)</span><span class="special">;</span></pre>
<p>Writes the parameters of the distribution to a <code class="computeroutput">std::ostream</code>. </p>
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<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> Traits<span class="special">&gt;</span>
<span class="keyword">friend</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
<a name="id1251832-bb"></a><span class="keyword">operator</span><span class="special">&gt;&gt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">Traits</span> <span class="special">&gt;</span> <span class="special">&amp;</span> is<span class="special">,</span>
<a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> bd<span class="special">)</span><span class="special">;</span></pre>
<p>Reads the parameters of the distribution from a <code class="computeroutput">std::istream</code>. </p>
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<pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="id1251874-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> lhs<span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>
<p>Returns true if the two distributions will produce the same sequence of values, given equal generators. </p>
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<li class="listitem">
<pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="id1251906-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> lhs<span class="special">,</span>
<span class="keyword">const</span> <a class="link" href="negative_binomial_distr_id1251245.html" title="Class template negative_binomial_distribution">negative_binomial_distribution</a> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>
<p>Returns true if the two distributions could produce different sequences of values, given equal generators. </p>
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</ol></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2000-2005 Jens Maurer<br>Copyright &#169; 2009, 2010 Steven Watanabe<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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