Mercurial > hg > camir-aes2014
annotate toolboxes/FullBNT-1.0.7/KPMtools/isposdef.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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children |
rev | line source |
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wolffd@0 | 1 function b = isposdef(a) |
wolffd@0 | 2 % ISPOSDEF Test for positive definite matrix. |
wolffd@0 | 3 % ISPOSDEF(A) returns 1 if A is positive definite, 0 otherwise. |
wolffd@0 | 4 % Using chol is much more efficient than computing eigenvectors. |
wolffd@0 | 5 |
wolffd@0 | 6 % From Tom Minka's lightspeed toolbox |
wolffd@0 | 7 |
wolffd@0 | 8 [R,p] = chol(a); |
wolffd@0 | 9 b = (p == 0); |