<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r68354249">src/mlpack/core/data/imputation_methods/mean_imputation.hpp</a>:</p>
<pre style='color:#555'>&gt; +#define MLPACK_CORE_DATA_IMPUTE_STRATEGIES_MEAN_IMPUTATION_HPP
&gt; +
&gt; +#include &lt;mlpack/core.hpp&gt;
&gt; +
&gt; +using namespace std;
&gt; +
&gt; +namespace mlpack {
&gt; +namespace data {
&gt; +
&gt; +/**
&gt; + * A simple mean imputation
&gt; + */
&gt; +template &lt;typename T&gt;
&gt; +class MeanImputation
&gt; +{
&gt; + public:
</pre>
<p>same as custom_imputation</p>

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