Inverse of a singular matrix

Question

Maria Dolores Benavides Ibañez 2020-5-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/531508-inverse-of-a-singular-matrix

回答： Vishnu Kuruppath 2020-5-26

Hi!

I need to do de inverse of the matrix for my aplication in Simulink, however it doesn't work because the matix is singular.

The output shold be a [2x2] matrix and it shows dimension 1.

I don't know what I can do.

I tried pinv, but the same error keep occuring.

Thanks for your time.

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Answer 1

Vishnu Kuruppath 2020-5-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/531508-inverse-of-a-singular-matrix#answer_438788

Hi Maria,

I understand that you are trying to compute the inverse of a singular matrix. A matrix is singular when it has no inverse.

When you try to compute the inverse of a singular matrix, it gives different values in different versions of MATLAB. This occurs due to the different Math Kernel Library(MKL) used in different versions of MATLAB. MathWorks update the MKL in new MATLAB releases. The result of matrix operations may be slightly different on different releases of MATLAB.

Please refer the link below to know more about inv function.

https://www.mathworks.com/help/matlab/ref/inv.html

Thanks,

Vishnu Kuruppath