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Problem 1321. Given a 4x4 matrix, swap the two middle columns

Created by Harish Maradana

If

 a = [1 2 3 4; 1 2 3 4; 1 2 3 4; 1 2 3 4];

then the result is

 ans =
     1     3     2     4
     1     3     2     4
     1     3     2     4
     1     3     2     4

Perform a simple swap of the two middle columns.

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84 solvers submitted 120 solutions (1.43 solutions/solver).

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