<p>In <a href="https://github.com/mlpack/mlpack/pull/696#discussion_r67214605">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>> +
> + pos_loc = arma::shuffle(pos_loc);
> + neg_loc = arma::shuffle(neg_loc);
> +
> + arma::umat loc(n_patches_per_gt * 2, 2);
> + //cout << "pos_loc size: " << arma::size(pos_loc) << " neg_loc size: " << arma::size(neg_loc) << endl;
> + //cout << "n_patches_per_gt = " << n_patches_per_gt << endl;
> + for(size_t i = 0; i < n_patches_per_gt; ++i)
> + {
> + loc.row(i) = arma::ind2sub(arma::size(dis.n_rows, dis.n_cols), pos_loc(i) ).t();
> + //cout << "pos_loc: " << loc(i, 0) << ", " << loc(i, 1) << endl;
> + }
> +
> + for(size_t i = n_patches_per_gt; i < 2 * n_patches_per_gt; ++i)
> + {
> + loc.row(i) = arma::ind2sub(arma::size(dis.n_rows, dis.n_cols), neg_loc(i) ).t();
</pre>
<p>Yes i get it now. it should be neg_loc(i - n_patches_per_gt)</p>
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