I wrote this (homework) function that creates a large matrix from the sub-matrices (0), (1), (2) and (3) so that it will be in this form: (0) has all its element "0" etc.
(0) (1)(3) (2)
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 function [M] = intquad(m,n) a = zeros(m,n); b = ones(m,n); c = b*2; d = b*3; M = [a b ; d c];
I went through each line in the command window and it worked flawlessly. I RAN x=intquad(m,n) with many combinations of (m,n) and got the expected outputs.
BUT, when I tested this function via HW4.p (yes, the Coursera brand) it tells me the function is incorrect and that
 "Feedback: Your function made an error for argument(s) 2, 3 "
My questions are:
1. If the function is flawed, where lies the culprit?
2. What is meant by "argument(s) 2, 3" ?
Thanks
My apologies, it is my 1st/ posting here, and the Preview window does not make much sense.