<p>In <a href="https://github.com/mlpack/mlpack/pull/742#discussion_r72761093">src/mlpack/methods/preprocess/preprocess_describe_main.cpp</a>:</p>
<pre style='color:#555'>&gt; +}
&gt; +/**
&gt; + * Calculates Skewness of the given vector.
&gt; + *
&gt; + * @param input Vector that captures a dimension of a dataset
&gt; + * @param rowStd Standard Deviation of the given vector.
&gt; + * @param rowMean Mean of the given vector.
&gt; + * @return Skewness of the given vector.
&gt; + */
&gt; +double Skewness(const arma::rowvec&amp; input,
&gt; +    const double&amp; rowStd,
&gt; +    const double&amp; rowMean,
&gt; +    const bool population)
&gt; +{
&gt; +  double skewness = 0;
&gt; +  double S3 = pow(rowStd, 3);
</pre>
<p>good candidate for const</p>

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