<p>In <a href="https://github.com/mlpack/mlpack/pull/742#discussion_r73025667">src/mlpack/methods/preprocess/preprocess_describe_main.cpp</a>:</p>
<pre style='color:#555'>&gt; +    double rowMean = arma::mean(row);
&gt; +    double rowStd = arma::stddev(row, population);
&gt; +
&gt; +    // Print statistics of the given dimension.
&gt; +    Log::Info &lt;&lt; boost::format(numberFormat)
&gt; +        % dimension
&gt; +        % arma::var(row, population)
&gt; +        % rowMean
&gt; +        % rowStd
&gt; +        % arma::median(row)
&gt; +        % rowMin
&gt; +        % rowMax
&gt; +        % (rowMax - rowMin) // range
&gt; +        % Skewness(row, rowStd, rowMean, population)
&gt; +        % Kurtosis(row, rowStd, rowMean, population)
&gt; +        % StandardError(row, rowStd) &lt;&lt; endl;
</pre>
<p>Everywhere else in the mlpack code we use just regular iostreams instead of boost::format... is it possible to use iostreams and iomanips here?  Like <code>std::setw</code>, etc.</p>

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