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/
Inner product of two vectors
Reverse the Words (not letters) of a String
Find a subset that divides the vector into equal halves
Make a run-length companion vector
Getting the indices from a matrice
Find the biggest empty box
2048 Next Move
Find the Next Legal Move in Reversi
Generate a melodic contour string matrix
Spot the outlier
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