[R] Data frame with 0 rows.
Tony Plate
tplate at acm.org
Wed Feb 20 19:26:19 CET 2008
Rolf Turner wrote:
> For reasons best known only to myself ( :-) ) I wish to create a data
> frame with 0 rows and 9 columns.
>
> The best I've been able to come up with is:
>
> junk <- as.data.frame(matrix(0,nrow=0,ncol=9))
>
> Is there a sexier way?
I'm unsure of their virtue or seediness, but here are some alternatives:
> data.frame(a=numeric(0), b=numeric(0)) # include 9 arguments if you like
[1] a b
<0 rows> (or 0-length row.names)
> as.data.frame(rep(list(a=numeric(0)), 9))
[1] a a.1 a.2 a.3 a.4 a.5 a.6 a.7 a.8
<0 rows> (or 0-length row.names)
>
-- Tony Plate
>
> cheers,
>
> Rolf
>
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