Your test suite doesn't really match the problem statement. The tests require matrices with *exactly* all elements abot the main diagonal to be 0 *and* all elements on or below the main diagonal to be 1.
Additional test cases have been added.
Running this on octave returns the correct results yet the page still says I'm wrong.
function y = triangMatrix(x)
I copied this code from somewhere.
Matrix indexing with two vectors of indices
Getting the row and column location from a matrix
Longest run of consecutive numbers
Make a run-length companion vector
Permute diagonal and antidiagonal
Back to basics 20 - singleton dimensions
Back to basics 22 - Rotate a matrix
Back to basics 12 - Input Arguments
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