use rref in matlab

To use rref in MATLAB, you need to input a matrix as an argument to the rref() function. The rref() function returns the reduced row echelon form of the matrix using Gaussian elimination. Here is an example:

main.m
% Define a matrix
A = [1 2 -1; 3 1 2; 2 3 1];

% Obtain the reduced row echelon form of A
rref(A)
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The output of this code would be:

main.m
ans =

    1.0000         0         0
         0    1.0000         0
         0         0    1.0000
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This is the reduced row echelon form of the matrix A. The rref() function is useful in solving systems of linear equations and in determining the rank and inverse of a matrix.