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view toolboxes/distance_learning/mlr/util/distToFrom.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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function D = distToFrom(n, Vto, Vfrom, Ito, Ifrom)
    Cross           = -2 * Vto' * Vfrom;
    Tonorm          = sum(Vto .^2, 1)';
    Fromnorm        = sum(Vfrom .^2, 1);

    D               = zeros(n);
    D(Ito,Ifrom)    = bsxfun(@plus, bsxfun(@plus, Cross, Tonorm), Fromnorm);
end