<p>In <a href="https://github.com/mlpack/mlpack/pull/742#discussion_r73782050">src/mlpack/methods/preprocess/preprocess_describe_main.cpp</a>:</p>
<pre style='color:#555'>&gt; +* Calculates the sum of deviations to the Nth Power
&gt; +*
&gt; +* @param input Vector that captures a dimension of a dataset
&gt; +* @param rowMean Mean of the given vector.
&gt; +* @return sum of nth power deviations
&gt; +*/
&gt; +double SumNthPowerDeviations(const arma::rowvec&amp; input,
&gt; +    const double&amp; rowMean,
&gt; +    const size_t Nth) // Degree of Power
&gt; +{
&gt; +  double sum = 0;
&gt; +  for (size_t i = 0; i &lt; input.n_elem; ++i)
&gt; +  {
&gt; +    sum += pow(input(i) - rowMean, Nth);
&gt; +  }
&gt; +  return sum;
</pre>
<p>updated</p>

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