Create a new variable that has trends in input series. If t+1 is bigger than or equal to t, than trend in t will be 1, otherwise 0. The end value of trend will always be zero
x = [2; 3; 0; 1; 2; 2; 1; 5; 6; 3];
y = [1; 0; 1; 1; 1; 0; 1; 1; 0; 0];
Getting the indices from a vector
Duplicate each element of a vector.
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Hexagonal numbers on a spiral matrix
Write out numbers in words
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