variable positions in matrix

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Linden
Linden 2014-5-6
回答： Image Analyst 2014-5-6
Hi Is it possible to easily switch the variable positions in a matirx. For example, I have 4 time series variables, x1, x2, x3 and x4. They form a matrix [x1 x2 x3 x4]. In my program, I want to give an indix that to each of these variables such that if I put 2 1 3 4, the matrix will become [x2 x1 x3 x4]. Many thanks

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Image Analyst
Image Analyst 2014-5-6
I think you just did it, didn't you? If you want and just have an array x, you can do
new_x = [x(:,2), x(:, 1), x(:, 3), x(:, 4)];

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