<p>In <a href="https://github.com/mlpack/mlpack/pull/742#discussion_r73782100">src/mlpack/methods/preprocess/preprocess_describe_main.cpp</a>:</p>
<pre style='color:#555'>&gt; +  const string inputFile = CLI::GetParam&lt;string&gt;(&quot;input_file&quot;);
&gt; +  const size_t dimension = static_cast&lt;size_t&gt;(CLI::GetParam&lt;int&gt;(&quot;dimension&quot;));
&gt; +  const size_t precision = static_cast&lt;size_t&gt;(CLI::GetParam&lt;int&gt;(&quot;precision&quot;));
&gt; +  const size_t width = static_cast&lt;size_t&gt;(CLI::GetParam&lt;int&gt;(&quot;width&quot;));
&gt; +  const bool population = CLI::HasParam(&quot;population&quot;);
&gt; +
&gt; +  // Load the data
&gt; +  arma::mat data;
&gt; +  data::Load(inputFile, data, false, true /*transpose*/);
&gt; +
&gt; +  // Generate boost format recipe.
&gt; +  const string widthPrecision(&quot;%-&quot;+
&gt; +    to_string(width)+ &quot;.&quot; +
&gt; +    to_string(precision));
&gt; +  const string widthOnly(&quot;%-&quot;+
&gt; +    to_string(width)+ &quot;.&quot;);
</pre>
<p>updated</p>

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