For given input matrix a, rotate it by 90 degrees and find the sum of the diagonals.
1 2 3 4
5 6 7 8
8 10 12 -2
-1 -3 -5 -7
Find all elements less than 0 or greater than 10 and replace them with NaN
Extract leading non-zero digit
Back to basics 26 - Keywords
Set some matrix elements to zero
Close MATLAB with keyboard
count upper and lower case characters
Basic matlab numeric and string manipulations
Percentage of zeros in a matrix of only 1s and 0s
Find NaNs in the matrix
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