re-arranging of columns

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aditi
aditi 2014-4-4
回答： Jos (10584) 2014-4-4
hi everyone..
i have a data file with 24 columns and 125 rows... I want to bring 23rd column after column 4... how will i do that... please help

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Viju
Viju 2014-4-4
编辑：Viju 2014-4-4
Once you import this data into a MATLAB variable, there are multiple methods. One way is as follows, where x is the data and y is where I am storing the new data.
y = [x(:,1:4) x(:,23) x(:,5:22) x(:,24)]
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aditi
aditi 2014-4-4
ohh okay.... thanks viju..
so here 'x' is the variable in which i load the data file?? right???

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Jos (10584)
Jos (10584) 2014-4-4
No need for concatenation …
A = load('mydatafile.txt') % only numbers separated by spaces/tabs
A(:,[4 23]) = A(:,[23 4]) % switch columns 4 and 23

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