[mlpack-git] [mlpack/mlpack] DatasetMapper & Imputer (#694)

[Tham]

> @@ -69,6 +69,29 @@ class MissingPolicy
>        return NaN;
>      }
>    }
> +
> +  template <typename eT, typename MapType>
> +  void MapTokens(const std::vector<std::string>& tokens,
> +                 size_t& row,
> +                 arma::Mat<eT>& matrix,
> +                 MapType& maps,
> +                 std::vector<Datatype>& types)
> +  {
> +    std::stringstream token;
> +    for (size_t i = 0; i != tokens.size(); ++i)
> +    {
> +      token.str(tokens[i]);
> +      token>>matrix.at(row, i);

What if users set the missing value as numerical value?

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