Message-ID: <20090210110253.323900@gmx.net>
Date: 2009-02-10T11:02:53Z
From: David Croll
Subject: Problem with retrieving updated variables after attach()
Hello,
suppose I have a data frame:
> mat
id age
1 NA NA
2 NA NA
3 NA NA
4 NA NA
5 NA NA
Then I attach the data frame:
> attach(mat)
I assign some new values...
> id <<- sample(100,5)
> age <<- rnorm(5,mean=30)
Then I want to create a new data frame from the variables id and age which still are attached to position 2 of the R environment...
> new_mat <- data.frame(ls(pos=2)) # I want to rescue ALL variables that were created by attach(mat)
> new_mat
ls.pos...2.
1 age
2 id
But this leads to a bogus object... how can I rescue the updated id and age values into new_mat?
Regards,
David
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