test cases imply that the question title should be "spot the square"
I added a rectangular (non-square) test case. Thanks for the note.
This is a good answer. I changed the test suite so that you wouldn't have to deal with logical input matrices. Sorry about that!
This code is referenced in the following blog post: http://blogs.mathworks.com/community/2015/01/19/robot-game-playing-in-matlab-part-2/
First non-zero element in each column
System of equations
Sum of diagonal of a square matrix
Polite numbers. N-th polite number.
When Was That Goal Scored?
Crossing to Kissing - Untangle the Lines
Do the lines intersect?
Find the stride of the longest skip sequence
Simulate one complete step in the Biham–Middleton–Levine traffic model
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