<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'>> @@ -48,6 +48,10 @@ PARAM_STRING("reference_file", "File containing the reference dataset.", "r",
> "");
> PARAM_STRING("distances_file", "File to output distances into.", "d", "");
> PARAM_STRING("neighbors_file", "File to output neighbors into.", "n", "");
> +PARAM_STRING("truth_file", "File of true neighbors for each query. "
> + "If specified, will compute recall (\% of neighbors found). Run with -v "
</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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