Matrix Inverse calculation problem.

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Rajeev Prajapati 2015-5-25

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https://ww2.mathworks.cn/matlabcentral/answers/218461-matrix-inverse-calculation-problem

评论： Bjorn Gustavsson 2015-5-26

help me with it.

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Geoff Hayes 2015-5-25

Rajeev - please describe (or show) what you have tried so far. Indicate which part of the code you are having problems with or not understanding.

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Mark Stone 2015-5-25

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编辑：Mark Stone 2015-5-25

If you have a matrix A, and want to calculate the inverse of it using MATLAB, then inv(A) is the inverse of A. If this is not sufficient to answer your question, then you need to explain what you are trying to do.

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Mark Stone 2015-5-25

编辑：Mark Stone 2015-5-25

pinv is just the ticket for linear least squares. solution = pinv(A) * b , computed using rock solid SVD, much more reliable than A\b .

I'm not quite sure why anyone, including me, is humoring the O.P. given the question as posed. I chose not to enter into a discussion that, often or usually, the inverse isn't needed, and you should use \ or whatever. I was leaving that for round 2 when/if the O.P. asked a reasonable question.

Bjorn Gustavsson 2015-5-26

Mark, I agree on all(most) all counts - the only objection I have is that when solving ill-conditioned inverse problems one should always look carefully at the eigenvalues and eigenvectors (and consider the full range of suitable regularizations).

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