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<tr class="memitem:ade6de704deea24fdc88077b3d9a0d534"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html#ade6de704deea24fdc88077b3d9a0d534">new_val</a> (T x)</td></tr>
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<tr class="memitem:af6198817084276113b3c064e87ce0555"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html#af6198817084276113b3c064e87ce0555">variance</a> () const</td></tr>
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unsigned int&#160;</td><td class="memItemRight" valign="bottom"><b>n</b> = 0</td></tr>
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double&#160;</td><td class="memItemRight" valign="bottom"><b>mu</b> = 0</td></tr>
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double&#160;</td><td class="memItemRight" valign="bottom"><b>M</b> = 0</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename T&gt;<br />
class statistics::stats_computer2&lt; T &gt;</h3>
<p>continuous mean and variance computance using Welford's algorithm (very accurate) </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a8290966ad468f2a8c266d008bc60720e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8290966ad468f2a8c266d008bc60720e">&#9670;&nbsp;</a></span>mean()</h2>
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template&lt;typename T &gt; </div>
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<td class="memname">double <a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html">statistics::stats_computer2</a>&lt; T &gt;::mean </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>return sample mean computed till last sample </p>
<div class="fragment"><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;{ <span class="keywordflow">return</span> mu; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ade6de704deea24fdc88077b3d9a0d534">&#9670;&nbsp;</a></span>new_val()</h2>
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<td class="memname">void <a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html">statistics::stats_computer2</a>&lt; T &gt;::new_val </td>
<td>(</td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
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<p>Constructor </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">x</td><td>new data sample </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; n++;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordtype">double</span> delta = x - mu;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; mu += delta / n;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordtype">double</span> delta2 = x - mu;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; M += delta * delta2;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#acf2e84df4fc386bb3295016ef8fd156e">&#9670;&nbsp;</a></span>std()</h2>
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template&lt;typename T &gt; </div>
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<td class="memname">double <a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html">statistics::stats_computer2</a>&lt; T &gt;::std </td>
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<p>return sample standard deviation computed till last sample </p>
<div class="fragment"><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;{ <span class="keywordflow">return</span> <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/math/sqrt.html">std::sqrt</a>(this-&gt;<a class="code" href="../../d8/dab/classstatistics_1_1stats__computer2.html#af6198817084276113b3c064e87ce0555">variance</a>()); }</div>
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Here is the call graph for this function:</div>
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../d8/dab/classstatistics_1_1stats__computer2_acf2e84df4fc386bb3295016ef8fd156e_cgraph.svg" width="446" height="104"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe>
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<h2 class="memtitle"><span class="permalink"><a href="#af6198817084276113b3c064e87ce0555">&#9670;&nbsp;</a></span>variance()</h2>
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<td class="memname">double <a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html">statistics::stats_computer2</a>&lt; T &gt;::variance </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>return data variance computed till last sample </p>
<div class="fragment"><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;{ <span class="keywordflow">return</span> M / n; }</div>
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<h2 class="groupheader">Friends And Related Function Documentation</h2>
<a id="a7e7a1a2b0a03df0a70cac40d193421d2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7e7a1a2b0a03df0a70cac40d193421d2">&#9670;&nbsp;</a></span>operator&gt;&gt;</h2>
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template&lt;typename T &gt; </div>
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<td class="memname"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::istream</a>&amp; operator&gt;&gt; </td>
<td>(</td>
<td class="paramtype"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::istream</a> &amp;&#160;</td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="../../d8/dab/classstatistics_1_1stats__computer2.html">stats_computer2</a>&lt; T &gt; &amp;&#160;</td>
<td class="paramname"><em>stat</em>&#160;</td>
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<td></td>
<td>)</td>
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<p>short-hand operator to read new sample from input stream <br />
e.g.: <code><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> &gt;&gt; stats1;</code> </p>
<div class="fragment"><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; T val;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; input &gt;&gt; val;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; stat.<a class="code" href="../../d8/dab/classstatistics_1_1stats__computer2.html#ade6de704deea24fdc88077b3d9a0d534">new_val</a>(val);</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">return</span> input;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; }</div>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>math/<a class="el" href="../../d0/d08/realtime__stats_8cpp.html">realtime_stats.cpp</a></li>
</ul>
</div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="asqrt_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/math/sqrt.html">std::sqrt</a></div><div class="ttdeci">T sqrt(T... args)</div></div>
<div class="ttc" id="aclassstatistics_1_1stats__computer2_html_af6198817084276113b3c064e87ce0555"><div class="ttname"><a href="../../d8/dab/classstatistics_1_1stats__computer2.html#af6198817084276113b3c064e87ce0555">statistics::stats_computer2::variance</a></div><div class="ttdeci">double variance() const</div><div class="ttdef"><b>Definition:</b> realtime_stats.cpp:89</div></div>
<div class="ttc" id="aclassstatistics_1_1stats__computer2_html_ade6de704deea24fdc88077b3d9a0d534"><div class="ttname"><a href="../../d8/dab/classstatistics_1_1stats__computer2.html#ade6de704deea24fdc88077b3d9a0d534">statistics::stats_computer2::new_val</a></div><div class="ttdeci">void new_val(T x)</div><div class="ttdef"><b>Definition:</b> realtime_stats.cpp:77</div></div>
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