compute the rank of a matrix in matlab

To compute the rank of a matrix in MATLAB, you can use the rank function. Here's an example:

main.m
% Define a matrix
A = [1 2 3; 4 5 6; 7 8 9];

% Compute the rank
r = rank(A);

% Display the result
disp(['Rank of A = ', num2str(r)]);
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This code will output:

main.m
Rank of A = 2
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Note that in this example, A is a 3x3 matrix, but its rank is only 2 because the third row is a linear combination of the first two rows.