<p>In <a href="https://github.com/mlpack/mlpack/pull/408#discussion_r25180471">src/mlpack/core/data/load_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; @@ -220,7 +220,9 @@ bool Load(const std::string&amp; filename,
&gt;  
&gt;    // Now transpose the matrix, if necessary.
&gt;    if (transpose)
&gt; -    matrix = trans(matrix);
&gt; +  {
&gt; +    arma::inplace_transpose(matrix);
&gt; +  }
</pre>
<p>I don't know where else we might use <code>inplace_transpose()</code>.  Do you think we should just inline it here instead of adding new files in <code>arma_extend/</code>?  I don't think this contribution will go back upstream, which is usually what <code>arma_extend</code> is for (backporting new functionality, or preparing new stuff to submit upstream).</p>

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