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I have a matrix A (in generalnotquadratic). It has an arbitrary amount of rows and L+1 columns. This matrix should be of rank K.

But using the MATLAB commandoften gives the wrong result.Code (Text):rank(K)

However, according to a paper this is another approach to identify K. It says: "Find the smallest L such that the matrix A is singular. Then K = L − 1."

But: A is not quadratic in general. How to I see if a non-quadratic matrix is singular? What would be the appropriate way to do this in MATLAB?

I do not understand this: I can not calculate the determinant of a non-quadratic matrix...

Regards,

divB

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# How is a non-quadratic matrix singular?

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