if you're going to post trivial problems that have already been posted before, at least use a proper test suite.
and this one does not even require a solution
Remove all the consonants
Solve the set of simultaneous linear equations
Sum of diagonal of a square matrix
matrix of natural number
Matlab Basics II - 3 Dimensional Arrays
Finding an element in a vector
Matlab Basics II - Intervals
Matlab Basics II - Determine if an array has a 3rd dimension
Matlab Basics - Set unwanted parts of a vector to zero
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