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/
Replace multiples of 5 with NaN
Create matrix of replicated elements
subtract central cross
03 - Matrix Variables 1
03 - Matrix Variables 3
Convex Hull Capture
Count the Digits in the Box
Balanced Ternary Numbers: Easy as |, |-, |o
Spot the outlier
Find the Final State of an Abelian Sandpile
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