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

Solution 278209

Submitted on 11 Jul 2013 by Shaun

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Test	Status	Code Input and Output
1	Pass	%% x =[1 2 3 4;1 2 3 4;1 2 3 4;1 2 3 4]; y_correct =[1 3 2 4;1 3 2 4;1 3 2 4;1 3 2 4]; assert(isequal(swapmid(x),y_correct))
2	Pass	%% x =[1 2 3 4;5 6 7 8;1 2 3 4;5 6 7 8]; y_correct =[1 3 2 4;5 7 6 8;1 3 2 4;5 7 6 8]; assert(isequal(swapmid(x),y_correct))

Test

Status

Code Input and Output

Pass

%% x =[1 2 3 4;1 2 3 4;1 2 3 4;1 2 3 4]; y_correct =[1 3 2 4;1 3 2 4;1 3 2 4;1 3 2 4]; assert(isequal(swapmid(x),y_correct))

Pass

%% x =[1 2 3 4;5 6 7 8;1 2 3 4;5 6 7 8]; y_correct =[1 3 2 4;5 7 6 8;1 3 2 4;5 7 6 8]; assert(isequal(swapmid(x),y_correct))