Algorithm which swaps the columns of a matrix A mx(n*2) without looping?

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MRC
MRC on 7 May 2014
Answered: Andrei Bobrov on 7 May 2014
Hi all, I need an algorithm which swaps the columns of a matrix A mx(n*2) without looping in the following way:
%if A=[column 1, column 2, ... column n, column n+1, ... column n*2]
%I want B=[column 1, column n+1, column 2, column n+2, ... column n, column 2*n]
E.g.
A=[1 2 3 4; 5 6 0 9; 1 2 1 8]
B=[1 4 2 3; 5 9 6 0; 1 8 2 1]
Could you help me?

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