www.gusucode.com > 用matlab仿真0到9十个数字的语音识别源码程序 > Speech-Recogenition/isposdef.m

    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);