[mlpack-git] [mlpack/mlpack] Random projection trees (#726)

Ryan Curtin notifications at github.com
Tue Aug 16 14:56:22 EDT 2016


> +{
> +  ElemType dist = 0;
> +
> +  for (size_t i = 0; i < samples.n_elem; i++)
> +    for (size_t j = i + 1; j < samples.n_elem; j++)
> +      dist += metric::SquaredEuclideanDistance::Evaluate(data.col(samples[i]),
> +          data.col(samples[j]));
> +
> +  dist /= (samples.n_elem * (samples.n_elem - 1) / 2);
> +
> +  return dist;
> +}
> +
> +template<typename BoundType, typename MatType>
> +void RPTreeMeanSplit<BoundType, MatType>::GetRandomDirection(
> +    arma::Col<ElemType>& direction)

I don't know if I have already written this somewhere else, but would it be better to move this to `core/math/` as a standalone function?

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