[R] help with subset

[Christos Hatzis]

Try %in%

subset(dat, treatment %in% vec) 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of 
> partofy at inoutbox.com
> Sent: Friday, May 02, 2008 11:41 PM
> To: r-help at r-project.org
> Subject: [R] help with subset
> 
> 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 at inoutbox.com
> 
> --
> 
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