annotate toolboxes/distance_learning/mlr/cuttingPlane/cpGradientDiagMKL.m @ 0:e9a9cd732c1e tip

first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 function dPsi = cpGradientDiagMKL(X, S, batchsize)
wolffd@0 2
wolffd@0 3 [d,n,m] = size(X);
wolffd@0 4
wolffd@0 5 dPsi = zeros(d,m);
wolffd@0 6
wolffd@0 7 for i = 1:m
wolffd@0 8 dPsi(:,i) = diag(X(:,:,i) * S * X(:,:,i)');
wolffd@0 9 end
wolffd@0 10
wolffd@0 11 dPsi = dPsi / batchsize;
wolffd@0 12 end