Can any one suggest me how to find Eigen Values for a very large matrics which is not positive definate?

1 次查看（过去 30 天）

shilpa 2015-5-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/219522-can-any-one-suggest-me-how-to-find-eigen-values-for-a-very-large-matrics-which-is-not-positive-defin

关闭： MATLAB Answer Bot 2021-8-20

In eigs>checkInputs/LUfactorAminusSigmaB at 1045 In eigs>checkInputs at 855 In eigs at 94 Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.605094e-16.

Every time I execute [Y,S,convergence] = eigs(Xsub,20,'SM'); I get this error.I tried things available over the internet, but nothing is working. Xsub is a Laplacian matrix which should be positive definite, but its not.