Mercurial > hg > camir-ismir2012

diff toolboxes/distance_learning/mlr/util/distToFrom.m @ 0:cc4b1211e677 tip

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initial commit to HG from Changeset: 646 (e263d8a21543) added further path and more save "camirversion.m"
author Daniel Wolff
date Fri, 19 Aug 2016 13:07:06 +0200
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/distance_learning/mlr/util/distToFrom.m	Fri Aug 19 13:07:06 2016 +0200
@@ -0,0 +1,8 @@
+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