<p>In <a href="https://github.com/mlpack/mlpack/pull/708#discussion_r71838952">src/mlpack/core/tree/vantage_point_tree/vantage_point_split_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; +{
&gt; +  std::vector&lt;SortStruct&lt;ElemType&gt;&gt; sorted(samples.n_rows);
&gt; +
&gt; +  for (size_t i = 0; i &lt; samples.n_rows; i++)
&gt; +  {
&gt; +    sorted[i].point = samples[i];
&gt; +    sorted[i].dist = bound.Metric().Evaluate(data.col(vantagePoint),
&gt; +        data.col(samples[i]));
&gt; +  }
&gt; +
&gt; +  //  Sort samples according to the distance to the vantage point
&gt; +  std::sort(sorted.begin(), sorted.end(), StructComp&lt;ElemType&gt;);
&gt; +
&gt; +  //  Get the midian value
&gt; +  mu = bound.Metric().Evaluate(data.col(vantagePoint),
&gt; +      data.col(sorted[sorted.size() / 2].point));
</pre>
<p>I'll fix that.</p>

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