Back to basics 21 - Matrix replicating
Covering some basic topics I haven't seen elsewhere on Cody.
Given an input matrix, generate an output matrix that consists o...
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sum of non-primes
The sum of the non-primes no larger than 10 is 1+4+6+8+9+10=38
Find the sum of all the positive non-prime integers that do no...
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subtract central cross
Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.
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Nilpotent matrix
Check if matrix A is
<http://mathworks.com/ nilpotent>.
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surrounded matrix
With a given matrix A (size m x n) create a matrix B (size m+2 x n+2) so that the matrix A is surrounded by ones:
A = [1 2 ...