<p>In <a href="https://github.com/mlpack/mlpack/pull/657#discussion_r65107431">src/mlpack/methods/lsh/lsh_main.cpp</a>:</p>
<pre style='color:#555'>&gt; @@ -48,6 +48,10 @@ PARAM_STRING(&quot;reference_file&quot;, &quot;File containing the reference dataset.&quot;, &quot;r&quot;,
&gt;      &quot;&quot;);
&gt;  PARAM_STRING(&quot;distances_file&quot;, &quot;File to output distances into.&quot;, &quot;d&quot;, &quot;&quot;);
&gt;  PARAM_STRING(&quot;neighbors_file&quot;, &quot;File to output neighbors into.&quot;, &quot;n&quot;, &quot;&quot;);
&gt; +PARAM_STRING(&quot;truth_file&quot;, &quot;File of true neighbors for each query. &quot;
&gt; +    &quot;If specified, will compute recall (\% of neighbors found). Run with -v &quot;
</pre>
<p>I'd consider calling the option --true_neighbors_file instead. Since we provide short option names (like -t) it's reasonable to have long (but descriptive) long parameter names.</p>

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