Justin,

try

subset(dat, treatment %in% vec)

I guess thats what you want.

On Fri, May 2, 2008 at 8:40 PM, <partofy@inoutbox.com> wrote:

> Dear list:
>
> I have a problem using the subset function:
>
> dat<- data.frame(treatment=c("A", "B", "A", "C", "C", "D", "A", "D",
> "C", "D"), response=rnorm(10))
>
> I am interested in treatments "A", "B" and "D"
> vec<- c("A", "B", "D")
>
> But I can only obtain what I want with:
> subset(dat, treatment=="A" | treatment=="B" | treatment=="D")
>
> What's wrong with
> subset(dat, treatment==vec)
>
> It would be much more simple to compute the latter in a rather complex
> dataframe.
> Thanks in advance
> Justin
> --
>
>  partofy@inoutbox.com
>
> --
>
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>



-- 
HTH/Best,
Jim Porzak
Responsys, Inc.
San Francisco, CA
http://www.linkedin.com/in/jimporzak

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