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

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shilpa
shilpa on 27 May 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
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.

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