Why change pi? there is pi built into matlab.
Find all elements less than 0 or greater than 10 and replace them with NaN
Back to basics 8 - Matrix Diagonals
Return area of square
Height of a right-angled triangle
If you have matrix A, create matrix B using matrix A as an "element"
Vector with a repeated entry
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
Square root of a number
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