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/
Project Euler: Problem 3, Largest prime factor
Project Euler: Problem 6, Natural numbers, squares and sums.
Find the nearest integer
Sum of odd numbers in a matrix
Simulate one complete step in the Biham–Middleton–Levine traffic model
Cell Counting: How Many Draws?
Repopulate the City
Stuff the Board
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