"cat" is a really nice touch for concatenation of those arrays! your solutions never fail my expectation.
by the way, i saw that "sub-func" comment...:)
Calling the two sub-functions the right way will not hurt your score. Great work though. :)
Make a checkerboard matrix
Back to basics 1 - Saving
letter yes yes & letter no no
Is it a number?
Matlab Basics - Rounding III
Find the largest number
Horizontal matrix sort
Find the average of a random sequance
Remove the first, third and fifth rows of a matrix
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