Re: [R] Selecting elements in vector

From: Rainer M Krug <r.m.krug_at_gmail.com>
Date: Fri, 14 Mar 2008 13:30:03 +0200

Thanks - that is exactly what I was looking for

Rainer

On Fri, Mar 14, 2008 at 1:10 PM, Henrique Dallazuanna <wwwhsd_at_gmail.com> wrote:
> Try this:
>
> x[x %in% y]
>
>
>
> On 14/03/2008, Rainer M Krug <r.m.krug_at_gmail.com> wrote:
> > Hi
> >
> > Consider the following code
> >
> > > x <- rep(1:13, 13)
> >
> > > y <- 1:3
> >
> > I want to select all elements in x which are equal to 1, 2 or 3.
> >
> > I know that I could use
> >
> > > sel <- x==y[1] | x==y[2] | x==y[3]
> > > x[sel]
> >
> > to obtain the values, but in my analysis, the y-vector is thousands of
> > elements long.
> >
> > Is there any way, that I can do that easily?
> >
> > Thanks
> >
> > Rainer
> > --
> > Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation Biology (UCT)
> >
> > Plant Conservation Unit Department of Botany
> > University of Cape Town
> > Rondebosch 7701
> > South Africa
> >
>
>
> > ______________________________________________
> > R-help_at_r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
> --
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
>

-- 
Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation Biology (UCT)

Plant Conservation Unit Department of Botany
University of Cape Town
Rondebosch 7701
South Africa

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Received on Fri 14 Mar 2008 - 11:34:52 GMT

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