<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r71824248">src/mlpack/core/data/imputation_methods/listwise_deletion.hpp</a>:</p>
<pre style='color:#555'>> + }
> +
> + /**
> + * Impute function searches through the input looking for mappedValue and
> + * remove the whole row or column. The result is overwritten to the input.
> + *
> + * @param input Matrix that contains mappedValue.
> + * @param mappedValue Value that the user wants to get rid of.
> + * @param dimension Index of the dimension of the mappedValue.
> + * @param columnMajor State of whether the input matrix is columnMajor or not.
> + */
> + void Impute(arma::Mat<T>& input,
> + const T& mappedValue,
> + const size_t dimension,
> + const bool columnMajor = true)
> + {
</pre>
<p>Now Impute(input, input, mappedValue, ...) is implemented by Impute(input, mappedValue, ...). Benefit of Impute(input, mappedValue, ...) is the users can reuse input, save the cost of allocating new memory.</p>
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