I would use match()

?match

Rich

On Tue, Feb 15, 2011 at 2:11 PM, Francois Rousseu <
francoisrousseu@hotmail.com> wrote:

>
> Hello R users
>
> When using the function which to get matches, I usually do
>
> w<-which(x==y)
> length(w)==0
>
> to determine if there are matches or not. Is there a base function that can
> do the thing more directly by returning a logical value if the result of
> which is empty or not?
>
> Thanks
> Francois Rousseu
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>
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