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

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Cosmin Grab
Cosmin Grab 2018-3-27
回答： Roger Stafford 2018-4-3
intputs n, m, A, B output pcc

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回答（2 个）

David Goodmanson
David Goodmanson 2018-4-3
编辑：David Goodmanson 2018-4-3
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
Roger Stafford 2018-4-3
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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