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   4 <title>Class template weighted_sum</title>
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  24 </div>
  25 <div class="refentry">
  26 <a name="boost.histogram.accumulators.weighted_sum"></a><div class="titlepage"></div>
  27 <div class="refnamediv">
  28 <h2><span class="refentrytitle">Class template weighted_sum</span></h2>
  29 <p>boost::histogram::accumulators::weighted_sum &#8212; Holds sum of weights and its variance estimate. </p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <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="../../../histogram/reference.html#header.boost.histogram.accumulators.weighted_sum_hpp" title="Header &lt;boost/histogram/accumulators/weighted_sum.hpp&gt;">boost/histogram/accumulators/weighted_sum.hpp</a>&gt;
  33
  34 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> RealType<span class="special">&gt;</span>
  35 <span class="keyword">class</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">{</span>
  36 <span class="keyword">public</span><span class="special">:</span>
  37   <span class="comment">// <a class="link" href="weighted_sum.html#boost.histogram.accumulators.weighted_sumconstruct-copy-destruct">construct/copy/destruct</a></span>
  38   <a class="link" href="weighted_sum.html#idm45414525041680-bb"><span class="identifier">weighted_sum</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span>
  39   <span class="keyword">explicit</span> <a class="link" href="weighted_sum.html#idm45414525041120-bb"><span class="identifier">weighted_sum</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  40   <a class="link" href="weighted_sum.html#idm45414525039600-bb"><span class="identifier">weighted_sum</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  41
  42   <span class="comment">// <a class="link" href="weighted_sum.html#idm45414525068048-bb">public member functions</a></span>
  43   <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525067488-bb"><span class="keyword">operator</span><span class="special">++</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  44   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525066064-bb"><span class="keyword">operator</span><span class="special">+=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  45   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525063104-bb"><span class="keyword">operator</span><span class="special">+=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  46   <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525059680-bb"><span class="keyword">operator</span> <span class="special">*=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  47   <span class="keyword">bool</span> <a class="link" href="weighted_sum.html#idm45414525057568-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  48   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
  49     <span class="keyword">bool</span> <a class="link" href="weighted_sum.html#idm45414525055760-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  50   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">bool</span> <a class="link" href="weighted_sum.html#idm45414525052656-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  51   <span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525050000-bb"><span class="identifier">value</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  52   <span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> <a class="link" href="weighted_sum.html#idm45414525048576-bb"><span class="identifier">variance</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  53   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">explicit</span> <a class="link" href="weighted_sum.html#idm45414525047152-bb"><span class="keyword">operator</span> <span class="identifier">T</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  54   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Archive<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="weighted_sum.html#idm45414525044912-bb"><span class="identifier">serialize</span></a><span class="special">(</span><span class="identifier">Archive</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">unsigned</span><span class="special">)</span><span class="special">;</span>
  55 <span class="special">}</span><span class="special">;</span></pre></div>
  56 <div class="refsect1">
  57 <a name="idm45212148280256"></a><h2>Description</h2>
  58 <div class="refsect2">
  59 <a name="idm45212148279840"></a><h3>
  60 <a name="boost.histogram.accumulators.weighted_sumconstruct-copy-destruct"></a><code class="computeroutput">weighted_sum</code>
  61         public
  62        construct/copy/destruct</h3>
  63 <div class="orderedlist"><ol class="orderedlist" type="1">
  64 <li class="listitem"><pre class="literallayout"><a name="idm45414525041680-bb"></a><span class="identifier">weighted_sum</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span></pre></li>
  65 <li class="listitem"><pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45414525041120-bb"></a><span class="identifier">weighted_sum</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> value<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  66 <li class="listitem"><pre class="literallayout"><a name="idm45414525039600-bb"></a><span class="identifier">weighted_sum</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> value<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> variance<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  67 </ol></div>
  68 </div>
  69 <div class="refsect2">
  70 <a name="idm45212148256480"></a><h3>
  71 <a name="idm45414525068048-bb"></a><code class="computeroutput">weighted_sum</code> public member functions</h3>
  72 <div class="orderedlist"><ol class="orderedlist" type="1">
  73 <li class="listitem">
  74 <pre class="literallayout"><a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a name="idm45414525067488-bb"></a><span class="keyword">operator</span><span class="special">++</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Increment by one. </li>
  75 <li class="listitem">
  76 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a name="idm45414525066064-bb"></a><span class="keyword">operator</span><span class="special">+=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span> value<span class="special">)</span><span class="special">;</span></pre>Increment by value. </li>
  77 <li class="listitem">
  78 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a name="idm45414525063104-bb"></a><span class="keyword">operator</span><span class="special">+=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> rhs<span class="special">)</span><span class="special">;</span></pre>Added another weighted sum. </li>
  79 <li class="listitem">
  80 <pre class="literallayout"><a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a> <span class="special">&amp;</span> <a name="idm45414525059680-bb"></a><span class="keyword">operator</span> <span class="special">*=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> x<span class="special">)</span><span class="special">;</span></pre>Scale by value. </li>
  81 <li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm45414525057568-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  82 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
  83   <span class="keyword">bool</span> <a name="idm45414525055760-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="weighted_sum.html" title="Class template weighted_sum">weighted_sum</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  84 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">bool</span> <a name="idm45414525052656-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span> rhs<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  85 <li class="listitem">
  86 <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> <a name="idm45414525050000-bb"></a><span class="identifier">value</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return value of the sum. </li>
  87 <li class="listitem">
  88 <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">RealType</span> <span class="special">&amp;</span> <a name="idm45414525048576-bb"></a><span class="identifier">variance</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Return estimated variance of the sum. </li>
  89 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">explicit</span> <a name="idm45414525047152-bb"></a><span class="keyword">operator</span> <span class="identifier">T</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
  90 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Archive<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idm45414525044912-bb"></a><span class="identifier">serialize</span><span class="special">(</span><span class="identifier">Archive</span> <span class="special">&amp;</span> ar<span class="special">,</span> <span class="keyword">unsigned</span><span class="special">)</span><span class="special">;</span></pre></li>
  91 </ol></div>
  92 </div>
  93 </div>
  94 </div>
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