[R] Selecting elements in vector

[Rainer M Krug]

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
>  >
>
>
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>  >
>
>
>  --
>  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