# how to make a function (named pcc ) that solves the cartesian product of 2 strings A(with n elements) and B(with m elements)?

4 views (last 30 days)
Cosmin Grab on 27 Mar 2018
Answered: Roger Stafford on 3 Apr 2018
intputs n, m, A, B output pcc

David Goodmanson on 3 Apr 2018
Edited: David Goodmanson on 3 Apr 2018
Hi Cosmin,
If by 'strings' you mean vectors of characters then there are questions about how to accomplish multiplication. If you mean vectors of numbers, then in this context the Cartesian product is the same as the outer product, multiplication of a column vector by a row vector:
a = [1 2 3].'
b = [4 5 6 7]
a*b
ans =
4 5 6 7
8 10 12 14
12 15 18 21

Roger Stafford on 3 Apr 2018
Assume A and B are row strings.
C = [reshape(repmat(A,length(B),1),[],1),repmat(B(:),length(A),1)];
The two-element rows of C will contain all possible pairs of elements of A and B.

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