No need for finding / calculating any phi or angle here. Just simpler than it is written.
Getting the row and column location from a matrix
Getting the indices from a matrice
select the primes of a vector
MATLAB Basic: rounding IV
Pythagorean perfect squares: find the square of the hypotenuse and the length of the other side
Flip the main diagonal of a matrix
Find the nearest integer
Find the "ordinary" or Euclidean distance between A and Z
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