make a random 250-by-100 matrix in matlab

To generate a 250-by-100 matrix with random numbers in Matlab, we can use the rand function, which generates a matrix with values randomly sampled from a uniform distribution between 0 and 1.

main.m
rand_matrix = rand(250, 100);
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This code creates a variable rand_matrix which will contain the 250-by-100 random matrix generated by the rand function.

If you want to generate a matrix with random numbers sampled from a different distribution or with a different range of values, Matlab provides other functions such as randn, randi, and randperm that you can use.