<p>In <a href="https://github.com/mlpack/mlpack/pull/683#discussion_r66462232">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>> + z[k+1] = +INF;
> + }
> +
> + k = 0;
> + for (int q = 0; q <= n-1; q++)
> + {
> + while (z[k+1] < q)
> + k++;
> + d[q] = (q - v[k]) * (q - v[k]) + f[v[k]];
> + }
> + return d;
> +}
> +
> +template<typename MatType, typename CubeType>
> +void StructuredForests<MatType, CubeType>::
> +dt_2d(MatType& im)
</pre>
<p>Nice candidate of const member function?</p>
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