inverse matrix problem, why inv(A)*A~=I

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Rafet 2014-2-25

编辑： John D'Errico 2014-2-25

hi everyone,

while solving a set of equations i can get a square matrix in various sizes, but whatever the matrix size is, i got singularity warnings.

i tried to get identity matrix with the following statements to provide consistency:

inv(A)*A and pinv(A)*A

but both of them gave a result of nonsense matrices

what may be the problem?

thanks in advance

Matt J 2014-2-25

Your choices of A may be singular?

John D'Errico 2014-2-25

编辑：John D'Errico 2014-2-25

Yeah. I wonder if the warnings about singular matrices may be a hint that the matrix is indeed singular? :)

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