[R] Selecting elements in vector

[Henrique Dallazuanna]

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