<p>In <a href="https://github.com/mlpack/mlpack/pull/664#discussion_r65640904">src/mlpack/core/tree/rectangle_tree/discrete_hilbert_value.hpp</a>:</p>
<pre style='color:#555'>> +
> + //! Return the largest Hilbert value
> + std::list<arma::Col<uint64_t>>::iterator LargestValue() const
> + { return largestValue; }
> +
> + //! Modify the largest Hilbert value
> + std::list<arma::Col<uint64_t>>::iterator &LargestValue()
> + { return largestValue; }
> +
> + //! Modify the local dataset
> + std::list<arma::Col<uint64_t>> *LocalDataset() { return localDataset; }
> + //! Modify the dataset
> + arma::Mat<uint64_t> *Dataset() { return dataset; }
> + private:
> + //! The dataset
> + arma::Mat<uint64_t> *dataset;
</pre>
<p>If I remember right, we had been discussing changing RectangleTree so it only uses the local dataset. If we do that, this member will become unnecessary and you'd only need to use the localDataset in this class too. But until we do that you should leave this how it is, I think. :)</p>
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