Mercurial > hg > camir-aes2014

diff toolboxes/FullBNT-1.0.7/KPMtools/isposdef.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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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/FullBNT-1.0.7/KPMtools/isposdef.m	Tue Feb 10 15:05:51 2015 +0000
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+function b = isposdef(a)
+% ISPOSDEF   Test for positive definite matrix.
+%    ISPOSDEF(A) returns 1 if A is positive definite, 0 otherwise.
+%    Using chol is much more efficient than computing eigenvectors.
+
+%  From Tom Minka's lightspeed toolbox
+
+[R,p] = chol(a);
+b = (p == 0);