<p>In <a href="https://github.com/mlpack/mlpack/pull/694#discussion_r69799626">src/mlpack/methods/preprocess/preprocess_imputer_main.cpp</a>:</p>
<pre style='color:#555'>> +using namespace std;
> +using namespace data;
> +
> +int main(int argc, char** argv)
> +{
> + // Parse command line options.
> + CLI::ParseCommandLine(argc, argv);
> +
> + const string inputFile = CLI::GetParam<string>("input_file");
> + const string outputFile = CLI::GetParam<string>("output_file");
> + const string missingValue = CLI::GetParam<string>("missing_value");
> + const double customValue = CLI::GetParam<double>("custom_value");
> + const size_t dimension = (size_t) CLI::GetParam<int>("dimension");
> + string strategy = CLI::GetParam<string>("strategy");
> +
> + // missing value should be specified
</pre>
<p>First picky comment. Comments should be complete sentences. Take a look at: <a href="https://github.com/mlpack/mlpack/wiki/DesignGuidelines#comments">https://github.com/mlpack/mlpack/wiki/DesignGuidelines#comments</a></p>
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