<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r68374052">src/mlpack/tests/imputation_test.cpp</a>:</p>
<pre style='color:#555'>&gt; +  double customValue = 99;
&gt; +  size_t feature = 0;
&gt; +
&gt; +  DatasetInfo info;
&gt; +  BOOST_REQUIRE(data::Load(&quot;test_file.csv&quot;, input, info) == true);
&gt; +
&gt; +  BOOST_REQUIRE_EQUAL(input.n_rows, 3);
&gt; +  BOOST_REQUIRE_EQUAL(input.n_cols, 3);
&gt; +
&gt; +  /* TODO: Connect Load with the new DatasetMapper instead of DatasetInfo*/
&gt; +
&gt; +  Imputer&lt;double,
&gt; +          DatasetInfo,
&gt; +          CustomImputation&lt;double&gt;&gt; impu(info);
&gt; +  impu.Impute(input, output, missingValue, customValue, feature);
&gt; +  // Remove the file.
</pre>
<p>This haven't complete?</p>

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