# R tips: Swapping columns in a matrix

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Using R, the statistical analysis and computing platform, swapping two columns in a matrix is really easy: `m[ , c(1,2)] <- m[ , c(2,1)]`

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Note, however, that this does not swap the column names (if you have any) but only the values. You could do something like `colnames(m)[c(1,2)] <- colnames(m)[c(2,1)]`

if you need the names changed as well, but better is perhaps just to assign:

m <- m[ , c(2, 1, 3:ncol(m)) ]

To

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