J-G, thanks for the problem. Could you add some more information about expected inputs and outputs? An example and some more tests would be helpful too. If your test suite has exactly one test, it's trivial to write a correct answer.
Return the first and last characters of a character array
index of n^2 in magic(n)
Find the square of the sum of the digits of a number
Square a Number
Operate on matrices of unequal, yet similar, size
Insert structure in a parameter-cell array.
Insert certain elements into a vector.
Create a random logical vector of N elements of which M are true.
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