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Condition number with respect to eigenvalues


c = condeig(A)
[V,D,s] = condeig(A)


c = condeig(A) returns a vector of condition numbers for the eigenvalues of A. These condition numbers are the reciprocals of the cosines of the angles between the left and right eigenvectors.

[V,D,s] = condeig(A) is equivalent to

[V,D] = eig(A);
s = condeig(A);

Large condition numbers imply that A is near a matrix with multiple eigenvalues.

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