[R] Re order variables in a dataframe

[Simon Blomberg]

Alphabetically, like this?:

> dat <- data.frame(d=rnorm(3), c=rnorm(3), b=rnorm(3), a=rnorm(3))
> dat
           d          c          b         a
1 -0.1816733 -0.4106008 -0.2855991 -1.022951
2 -1.8326818 -0.6515208  0.3344884 -2.191836
3  1.0924867  0.1159611 -1.3409719  1.195545
> dat2 <- dat[,order(names(dat))]
> dat2
          a          b          c          d
1 -1.022951 -0.2855991 -0.4106008 -0.1816733
2 -2.191836  0.3344884 -0.6515208 -1.8326818
3  1.195545 -1.3409719  0.1159611  1.0924867
> 

Cheers,

Simon.

On Wed, 2009-05-20 at 20:19 -0700, pgseye wrote:
> This is no doubt a very basic question for most R users, but is there an easy
> way to reorder the variables (columns) in a dataframe (I can't seem to find
> an answer anywhere). I've generally been creating a new dataframe and
> selecting the new order I want from the old but this is time-consuming.
> 
> Thanks,
> 
> Paul
-- 
Simon Blomberg, BSc (Hons), PhD, MAppStat. 
Lecturer and Consultant Statistician 
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email: S.Blomberg1_at_uq.edu.au

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