make random 3x3 matrix in matlab

You can use the rand function in MATLAB to generate a random 3x3 matrix. Here's an example:

main.m
A = rand(3);
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The rand function returns random values between 0 and 1, and by default, it creates a matrix of the same size as the input. So rand(3) will generate a 3x3 matrix with random values. If you want to generate random integers in a specific range, you can use the randi function instead. Here's an example of generating a random 3x3 matrix with values between 1 and 10:

main.m
A = randi([1, 10], 3);
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In this case, randi([1, 10], 3) will generate a 3x3 matrix with random integers between 1 and 10 (inclusive).