[R] Swap variables in data.frame

[Rogers, James A [PGRD Groton]]

Birgit Lemcke wrote:

> I have a dataframe and two of my variables are in the wrong position 
> and I would like to swap those variables. 

In addition to the other solutions posted, if you prefer to reference
the columns by name rather than by index, you could use subset() 

dat <- data.frame(a = letters[1:3], b = LETTERS[1:3], c = 1:3, d = 3:1)

subset(dat, select = c(b, a, c, d))
## or equivalently, something like:
subset(dat, select = c(b:a, c:d))


--Jim 

James A. Rogers, Ph.D. 
Associate Director, Neuroscience Statistics
Pfizer Global R&D New London
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