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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.
balance Improve accuracy of computed eigenvalues
cond Condition number with respect to inversion
eig Eigenvalues and eigenvectors