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
Back to basics 13 - Input variables
Return the first and last characters of a character array
Find number of days
Find the hypotenuse
Cell Counting: How Many Draws?
Generate a melodic contour string matrix
Spot the outlier
Make a run-length companion vector
Stuff the Board
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