<p>In <a href="https://github.com/mlpack/mlpack/pull/747#discussion_r75203370">src/mlpack/methods/neighbor_search/knn_main.cpp</a>:</p>
<pre style='color:#555'>> @@ -78,6 +82,9 @@ PARAM_FLAG("single_mode", "If true, single-tree search is used (as opposed to "
> "dual-tree search).", "S");
> PARAM_DOUBLE_IN("epsilon", "If specified, will do approximate nearest neighbor "
> "search with given relative error.", "e", 0);
> +PARAM_STRING_IN("effective_error", "If specified, will compare the results "
> + "against the provided distances file, and will print the average relative "
> + "error.", "E", "");
</pre>
<p>Sure! Done in: <a href="https://github.com/mlpack/mlpack/pull/747/commits/c5fe485b25e93f35b14f2c9fbc6b69ddbe59a837" class="commit-link"><tt>c5fe485</tt></a></p>
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