On Mon, 2008-12-01 at 10:53 -0800, Reitsma, Rene - COB wrote:
> Dear All,
>
> I'm hoping one of you can help me with the following R problem. I'm
> trying to refer to a member of a list by variable. However, this seems
> not to work:
>
> foo=list(first=c(1:10),second=c(11:20))
>
> > foo$first
> [1] 1 2 3 4 5 6 7 8 9 10
>
> > foo$"first"
> [1] 1 2 3 4 5 6 7 8 9 10
>
> > goo=c("first")
>
> > foo$goo
> NULL
foo[[goo]]
See ?`[[` for more details. Not sure if there is an incantation that
will work with '$' in this case.
HTH
G
>
> > foo$goo[1]
> NULL
>
> I'm sure I'm missing something quite elementary. Perhaps you can help?
>
> RR
>
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