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

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

Answer 1

[Andrew Newell]

You can do this with the matrix indices. For the example you give,

b = a(:,[2 1]);

EDIT: See also Matrix indexing in MATLAB.

Answer 2

[Walter Roberson]

In the above case,

b = fliplr(a);

[som]

Thanks for your good guidance.