a command for changing the place of columns in a matrix directly

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som
som 2011-12-29
Hi all
I have a matrix m-by-n and I want to change the place of columns with an espiciall command in matlab. How can I do this . for Example:
a=[10 20; 20 40; 10 30] chaanged to b=[20 10; 40 20; 30 10]
Thanks for your guidance cheers

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Andrew Newell
Andrew Newell 2011-12-29
You can do this with the matrix indices. For the example you give,
b = a(:,[2 1]);
EDIT: See also Matrix indexing in MATLAB.

更多回答（1 个）

Walter Roberson
Walter Roberson 2011-12-29
In the above case,
b = fliplr(a);

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