[R] help with subset

[partofy at inoutbox.com]

Thank you Christos and Jim: 

That is precisely what I was after.


On Sat, 3 May 2008 00:01:58 -0400, "Christos Hatzis"
<christos.hatzis at nuverabio.com> said:
> 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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> > PLEASE do read the posting guide 
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> > 
> > 
> 
> 
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  partofy at inoutbox.com

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