Re: [R] Data frame with 0 rows.

From: Tony Plate <tplate_at_acm.org>
Date: Wed, 20 Feb 2008 11:26:19 -0700

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)
 >

>
> cheers,
>
> Rolf
>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed 20 Feb 2008 - 18:29:20 GMT

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