given the position of a chess piece in algebric notation, convert it into 8 by 8 matrix format. For example,
Nb. invalid ones should be represented by nan.
How to find the position of an element in a vector without using the find function
Least common multiple of many numbers
Project Euler: Problem 4, Palindromic numbers
Project Euler: Problem 6, Natural numbers, squares and sums.
Matrix to column conversion
Sky full of stars - 03
generate the matrix
No of squares in a grid
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