logdet.m

来自「能够简单识别0~9十个数字的matlab程序」· M 代码 · 共 9 行

function y = logdet(A)
% log(det(A)) where A is positive-definite.
% This is faster and more stable than using log(det(A)).

%  From Tom Minka's lightspeed toolbox

U = chol(A);
y = 2*sum(log(diag(U)));