The test is wrong, the right answer is y_correct = [2 1 3 2];
Omit columns averages from a matrix
Do you like your boss?
Create a matrix X, where each column is a shifted copy of the vector v
Find the elements of a matrix according to a defined property.
Duplicate each element of a vector.
A quadrant matrix
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
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