All odd numbers in x are added, while all even numers are subtracted from this.
x = [1 2 3 4 5];
y = +(1+3+5)-(2+4) = 3
Back to basics 8 - Matrix Diagonals
Evaluating a polynomial
Matlab Basics - Rounding II
Array of Ones
Replace every 3rd element in a vector with 4
Connect 4 (the boardgame)
Odd times 3
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