Back to basics 8 - Matrix Diagonals
Back to basics 22 - Rotate a matrix
letter yes yes & letter no no
Deleting an element in a matrix
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
A quadrant matrix
First non-zero element in each column
vectorization in N
Find the elements of a matrix according to a defined property.
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