How can I find the determinant and transpose of a 13*13 matrix without writing all the numbers one by one?
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madhan ravi
on 26 Nov 2023
doc det
doc transpose
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Walter Roberson
on 26 Nov 2023
You could construct the matrix using sparse by listing the row numbers and column numbers and corresponding values. I count about 42 non-zero elements, so it would look like
sparse(list_of_42_rows, list_of_42_columns, list_of_42_values)
That would be 42*3 = 126 elements to enter instead of 13*13 = 169 -- but it would also be much easier to get wrong. TANSTAAFL
John D'Errico
on 26 Nov 2023
You have many almost random looking numbers. So without knowing how they were generate, it is impossible to do better than stuffing the elements of your matrix using either the scheme @Torsten or @Walter Roberson has proposed.
HOWEVER, IF there is some formula that generates those numbers, then you need to write it in MATLAB code. And only you can write that code, since only you know how those coefficients were generated, and what the placement means. But surely there is SOME formula. We cannot guess it however.
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