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
Remove all the consonants
Read a column of numbers and interpolate missing data
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Given area find sides
Remove the two elements next to NaN value
Create a vector whose elements depend on the previous element
Sophie Germain prime
Convert a structure into a string
Matrix with different incremental runs
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