[R] Odp: Problem with retrieving updated variables after attach()
Berwin A Turlach
berwin at maths.uwa.edu.au
Tue Feb 10 13:57:44 CET 2009
On Tue, 10 Feb 2009 13:23:50 +0100
David Croll <david.croll at gmx.ch> wrote:
> Well, I knew that attach() only creates a copy of the variables in
> the search path.
> What I wanted to ask was how to *retrieve* that copy...
> > mat
> id age
> 1 NA NA
> 2 NA NA
> 3 NA NA
> 4 NA NA
> 5 NA NA
> > attach(mat)
> > id <<- sample(100,5)
> > age <<- rnorm(5,mean=30)
> How can I make a new data frame out of the id and age that were
> changed above?
R> new.df <- data.frame(id,age)
Or, perhaps more automatic:
R> new.df <- do.call(data.frame, sapply(ls(pos=2), as.name))
Is this what you are after?
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