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   5 <title>Class template weibull_distribution</title>
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  26 <div class="refentry">
  27 <a name="boost.random.weibull_distribution"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template weibull_distribution</span></h2>
  30 <p>boost::random::weibull_distribution</p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <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.weibull_distribution_hpp" title="Header &lt;boost/random/weibull_distribution.hpp&gt;">boost/random/weibull_distribution.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> RealType <span class="special">=</span> <span class="keyword">double</span><span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">{</span>
  37 <span class="keyword">public</span><span class="special">:</span>
  38   <span class="comment">// types</span>
  39   <span class="keyword">typedef</span> <span class="identifier">RealType</span> <a name="boost.random.weibull_distribution.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
  40   <span class="keyword">typedef</span> <span class="identifier">RealType</span> <a name="boost.random.weibull_distribution.input_type"></a><span class="identifier">input_type</span><span class="special">;</span>
  41
  42   <span class="comment">// member classes/structs/unions</span>
  43
  44   <span class="keyword">class</span> <a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">{</span>
  45   <span class="keyword">public</span><span class="special">:</span>
  46     <span class="comment">// types</span>
  47     <span class="keyword">typedef</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <a class="link" href="weibull_distribution/param_type.html#boost.random.weibull_distribution.param_type.distribution_type"><span class="identifier">distribution_type</span></a><span class="special">;</span>
  48
  49     <span class="comment">// <a class="link" href="weibull_distribution/param_type.html#boost.random.weibull_distribution.param_typeconstruct-copy-destruct">construct/copy/destruct</a></span>
  50     <span class="keyword">explicit</span> <a class="link" href="weibull_distribution/param_type.html#idp711890864-bb"><span class="identifier">param_type</span></a><span class="special">(</span><span class="identifier">RealType</span> <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">,</span> <span class="identifier">RealType</span> <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">)</span><span class="special">;</span>
  51
  52     <span class="comment">// <a class="link" href="weibull_distribution/param_type.html#idp711887008-bb">public member functions</a></span>
  53     <span class="identifier">RealType</span> <a class="link" href="weibull_distribution/param_type.html#idp711887568-bb"><span class="identifier">a</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  54     <span class="identifier">RealType</span> <a class="link" href="weibull_distribution/param_type.html#idp711889136-bb"><span class="identifier">b</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  55
  56     <span class="comment">// <a class="link" href="weibull_distribution/param_type.html#idp711895008-bb">friend functions</a></span>
  57     <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>
  58       <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>
  59       <a class="link" href="weibull_distribution/param_type.html#idp711895568-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="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  60     <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>
  61       <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>
  62       <a class="link" href="weibull_distribution/param_type.html#idp711901440-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> <span class="keyword">const</span> <a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  63     <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="weibull_distribution/param_type.html#idp711907312-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/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="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  64     <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="weibull_distribution/param_type.html#idp711910896-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/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="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  65   <span class="special">}</span><span class="special">;</span>
  66
  67   <span class="comment">// <a class="link" href="weibull_distribution.html#boost.random.weibull_distributionconstruct-copy-destruct">construct/copy/destruct</a></span>
  68   <span class="keyword">explicit</span> <a class="link" href="weibull_distribution.html#idp711937568-bb"><span class="identifier">weibull_distribution</span></a><span class="special">(</span><span class="identifier">RealType</span> <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">,</span> <span class="identifier">RealType</span> <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">)</span><span class="special">;</span>
  69   <span class="keyword">explicit</span> <a class="link" href="weibull_distribution.html#idp711941680-bb"><span class="identifier">weibull_distribution</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  70
  71   <span class="comment">// <a class="link" href="weibull_distribution.html#idp711916336-bb">public member functions</a></span>
  72   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span> <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711916896-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>
  73   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span>
  74     <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711920864-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="weibull_distribution/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>
  75   <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711925616-bb"><span class="identifier">a</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  76   <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711927184-bb"><span class="identifier">b</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  77   <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711928752-bb"><span class="identifier">min</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  78   <span class="identifier">RealType</span> <a class="link" href="weibull_distribution.html#idp711930336-bb"><span class="identifier">max</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  79   <a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <a class="link" href="weibull_distribution.html#idp711931920-bb"><span class="identifier">param</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  80   <span class="keyword">void</span> <a class="link" href="weibull_distribution.html#idp711933616-bb"><span class="identifier">param</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  81   <span class="keyword">void</span> <a class="link" href="weibull_distribution.html#idp711936048-bb"><span class="identifier">reset</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  82
  83   <span class="comment">// <a class="link" href="weibull_distribution.html#idp711944656-bb">friend functions</a></span>
  84   <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>
  85     <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>
  86     <a class="link" href="weibull_distribution.html#idp711945216-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>
  87                <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  88   <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>
  89     <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>
  90     <a class="link" href="weibull_distribution.html#idp711951072-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>
  91                <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  92   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="weibull_distribution.html#idp711956928-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">,</span>
  93                          <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  94   <span class="keyword">friend</span> <span class="keyword">bool</span> <a class="link" href="weibull_distribution.html#idp711961392-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">,</span>
  95                          <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  96 <span class="special">}</span><span class="special">;</span></pre></div>
  97 <div class="refsect1">
  98 <a name="idp512845904"></a><h2>Description</h2>
  99 <p>The Weibull distribution is a real valued distribution with two parameters a and b, producing values &gt;= 0.</p>
 100 <p>It has <span class="inlinemediaobject"><img src="../../images/random//form_56.png"></span>. </p>
 101 <div class="refsect2">
 102 <a name="idp512849584"></a><h3>
 103 <a name="boost.random.weibull_distributionconstruct-copy-destruct"></a><code class="computeroutput">weibull_distribution</code>
 104         public
 105        construct/copy/destruct</h3>
 106 <div class="orderedlist"><ol class="orderedlist" type="1">
 107 <li class="listitem">
 108 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp711937568-bb"></a><span class="identifier">weibull_distribution</span><span class="special">(</span><span class="identifier">RealType</span> a <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">,</span> <span class="identifier">RealType</span> b <span class="special">=</span> <span class="number">1</span><span class="special">.</span><span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>
 109 <p>Constructs a <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> from its "a" and "b" parameters.</p>
 110 <p>Requires: a &gt; 0 &amp;&amp; b &gt; 0 </p>
 111 </li>
 112 <li class="listitem">
 113 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp711941680-bb"></a><span class="identifier">weibull_distribution</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/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>
 114 <p>Constructs a <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> from its parameters. </p>
 115 </li>
 116 </ol></div>
 117 </div>
 118 <div class="refsect2">
 119 <a name="idp512873696"></a><h3>
 120 <a name="idp711916336-bb"></a><code class="computeroutput">weibull_distribution</code> public member functions</h3>
 121 <div class="orderedlist"><ol class="orderedlist" type="1">
 122 <li class="listitem">
 123 <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">RealType</span> <a name="idp711916896-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>
 124 <p>Returns a random variate distributed according to the <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code>. </p>
 125 </li>
 126 <li class="listitem">
 127 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> URNG<span class="special">&gt;</span>
 128   <span class="identifier">RealType</span> <a name="idp711920864-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="weibull_distribution/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>
 129 <p>Returns a random variate distributed accordint to the Weibull distribution with parameters specified by <code class="computeroutput">param</code>. </p>
 130 </li>
 131 <li class="listitem">
 132 <pre class="literallayout"><span class="identifier">RealType</span> <a name="idp711925616-bb"></a><span class="identifier">a</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 133 <p>Returns the "a" parameter of the distribution. </p>
 134 </li>
 135 <li class="listitem">
 136 <pre class="literallayout"><span class="identifier">RealType</span> <a name="idp711927184-bb"></a><span class="identifier">b</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 137 <p>Returns the "b" parameter of the distribution. </p>
 138 </li>
 139 <li class="listitem">
 140 <pre class="literallayout"><span class="identifier">RealType</span> <a name="idp711928752-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>
 141 <p>Returns the smallest value that the distribution can produce. </p>
 142 </li>
 143 <li class="listitem">
 144 <pre class="literallayout"><span class="identifier">RealType</span> <a name="idp711930336-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>
 145 <p>Returns the largest value that the distribution can produce. </p>
 146 </li>
 147 <li class="listitem">
 148 <pre class="literallayout"><a class="link" href="weibull_distribution/param_type.html" title="Class param_type">param_type</a> <a name="idp711931920-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>
 149 <p>Returns the parameters of the distribution. </p>
 150 </li>
 151 <li class="listitem">
 152 <pre class="literallayout"><span class="keyword">void</span> <a name="idp711933616-bb"></a><span class="identifier">param</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution/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>
 153 <p>Sets the parameters of the distribution. </p>
 154 </li>
 155 <li class="listitem">
 156 <pre class="literallayout"><span class="keyword">void</span> <a name="idp711936048-bb"></a><span class="identifier">reset</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 157 <p>Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset. </p>
 158 </li>
 159 </ol></div>
 160 </div>
 161 <div class="refsect2">
 162 <a name="idp512939776"></a><h3>
 163 <a name="idp711944656-bb"></a><code class="computeroutput">weibull_distribution</code> friend functions</h3>
 164 <div class="orderedlist"><ol class="orderedlist" type="1">
 165 <li class="listitem">
 166 <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>
 167   <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>
 168   <a name="idp711945216-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>
 169              <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> wd<span class="special">)</span><span class="special">;</span></pre>
 170 <p>Writes a <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> to a <code class="computeroutput">std::ostream</code>. </p>
 171 </li>
 172 <li class="listitem">
 173 <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>
 174   <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>
 175   <a name="idp711951072-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>
 176              <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> wd<span class="special">)</span><span class="special">;</span></pre>
 177 <p>Reads a <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> from a <code class="computeroutput">std::istream</code>. </p>
 178 </li>
 179 <li class="listitem">
 180 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="idp711956928-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> lhs<span class="special">,</span>
 181                        <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>
 182 <p>Returns true if the two instances of <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> will return identical sequences of values given equal generators. </p>
 183 </li>
 184 <li class="listitem">
 185 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="idp711961392-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> lhs<span class="special">,</span>
 186                        <span class="keyword">const</span> <a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>
 187 <p>Returns true if the two instances of <code class="computeroutput"><code class="computeroutput"><a class="link" href="weibull_distribution.html" title="Class template weibull_distribution">weibull_distribution</a></code></code> will return different sequences of values given equal generators. </p>
 188 </li>
 189 </ol></div>
 190 </div>
 191 </div>
 192 </div>
 193 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 194 <td align="left"></td>
 195 <td align="right"><div class="copyright-footer">Copyright &#169; 2000-2005 Jens Maurer<br>Copyright &#169; 2009, 2010 Steven Watanabe<p>
 196         Distributed under the Boost Software License, Version 1.0. (See accompanying
 197         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>)
 198       </p>
 199 </div></td>
 200 </tr></table>
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