view toolboxes/FullBNT-1.0.7/KPMtools/isposdef.m @ 0:e9a9cd732c1e tip

first hg version after svn

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);