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

[Tham]

> +  arma::mat input("3.0 0.0 2.0 0.0;"
> +                  "5.0 6.0 0.0 6.0;"
> +                  "9.0 8.0 4.0 8.0;");
> +  arma::mat outputT; // assume input is transposed
> +  arma::mat output;  // assume input is not transposed
> +  double mappedValue = 0.0;
> +
> +  MedianImputation<double> imputer;
> +
> +  // transposed
> +  imputer.Apply(input, outputT, mappedValue, 1/*dimension*/, true);
> +
> +  BOOST_REQUIRE_CLOSE(outputT(0, 0), 3.0, 1e-5);
> +  BOOST_REQUIRE_CLOSE(outputT(0, 1), 0.0, 1e-5);
> +  BOOST_REQUIRE_CLOSE(outputT(0, 2), 2.0, 1e-5);
> +  BOOST_REQUIRE_CLOSE(outputT(0, 3), 0.0, 1e-5);

Weird, I think the dimension of outputT  is same as input?

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