Back to basics 8 - Matrix Diagonals
Back to basics 25 - Valid variable names
Find a subset that divides the vector into equal halves
Make a run-length companion vector
Remove the Zero
First non-zero element in each column
vectorization in N
A quadrant matrix
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Create a matrix X, where each column is a shifted copy of the vector v
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