Create an n-by-n matrix with elements ranging from 1 to n^2 in a rectangular spiral pattern.
Example if n = 5 :
21 22 23 24 25
20 7 8 9 10
19 6 1 2 11
18 5 4 3 12
17 16 15 14 13
Angle of triangle
Get the length of a given vector
Say something funny
Matrix to column conversion
Is this triangle right-angled?
Number of bytes required to store a sparse matrix
Create a matrix from a cell
Convert a structure into a string
Find all the zeros of sinus , cosinus and tangent in a given interval
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