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taking the inverse of multiple matrix's

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Andrew MacPhee
Andrew MacPhee 2023-2-9
回答： Harshvardhan 2023-3-11
sigma is a 28x28x10 matrix, or 10 28x28 matrix's. I'd like to get the iverse of each of those matrix's and store them in mean_inverse, but it is saying "Warning: Matrix is singular to working precision. " What am I doing wrong?

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Torsten
Torsten 2023-2-9
移动：Torsten 2023-2-9
What am I doing wrong?
Nothing. But some or all of the sigma matrices that you try to invert seem to be singular.
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Walter Roberson
Walter Roberson 2023-2-9
There are, however, arguments to be made that in practice using inv() is most often a mistake, that there are very often mathematically better methods that do not involve explicit calculation of the inverse of a matrix.

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Harshvardhan
Harshvardhan 2023-3-11
Ran in:
% Define the matrices
A = [1 2; 3 4];
B = [5 6; 7 8];
C = [9 10; 11 12];
% Create a cell array of the matrices
matrices = {A, B, C};
% Loop through the matrices and calculate their inverses
for i = 1:length(matrices)
inv_matrices{i} = inv(matrices{i});
end
% Display the inverse matrices
for i = 1:length(inv_matrices)
disp(['Inverse of matrix ', num2str(i), ':']);
disp(inv_matrices{i});
end
Inverse of matrix 1:
-2.0000 1.0000 1.5000 -0.5000
Inverse of matrix 2:
-4.0000 3.0000 3.5000 -2.5000
Inverse of matrix 3:
-6.0000 5.0000 5.5000 -4.5000

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