<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r69403314">src/mlpack/core/data/load_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; @@ -65,34 +65,17 @@ void MapToNumerical(const std::vector&lt;std::string&gt;&amp; tokens,
&gt;                      DatasetMapper&lt;PolicyType&gt;&amp; info,
&gt;                      arma::Mat&lt;eT&gt;&amp; matrix)
&gt;  {
&gt; -  auto notNumber = [](const std::string&amp; str)
&gt; +  std::stringstream token;
&gt; +  for (size_t i = 0; i != tokens.size(); ++i)
</pre>
<p>Nice idea, thanks for the enhancement <g-emoji alias="+1" fallback-src="https://assets-cdn.github.com/images/icons/emoji/unicode/1f44d.png">👍</g-emoji> </p>

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