<p>In <a href="https://github.com/mlpack/mlpack/pull/523#discussion_r59445126">src/mlpack/core/util/split_data.hpp</a>:</p>
<pre style='color:#555'>> + arma::Row<U> const &inputLabel,
> + arma::Mat<T> &trainData,
> + arma::Mat<T> &testData,
> + arma::Row<U> &trainLabel,
> + arma::Row<U> &testLabel)
> + {
> + size_t const testSize =
> + static_cast<size_t>(input.n_cols * testRatio);
> + size_t const trainSize = input.n_cols - testSize;
> + trainData.set_size(input.n_rows, trainSize);
> + testData.set_size(input.n_rows, testSize);
> + trainLabel.set_size(trainSize);
> + testLabel.set_size(testSize);
> +
> + using Col = arma::Col<size_t>;
> + arma::arma_rng::set_seed(seed);
</pre>
<p>I don't think there's any need for this, we should just assume that the user has called <code>math::RandomSeed()</code> appropriately.</p>
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