On Thu, Feb 02, 2012 at 01:55:07PM +0800, 孟欣 wrote:
> v1<-c("a","b","c","d")
> v2<-c("a","b","e")
> v3<-c("a","f","g")
>
>
> I want to get the intersection of v1,v2,v3,ie "a"
>
>
> How can I do then?
>
>
> What I know is only for 2 vectors via "intersect" function,but don't know how
> to deal with multiple vectors.
Hi.
Set intersection is an associative operation. So,
intersect(intersect(v1, v2), v3)
or
intersect(v1, intersect(v2, v3))
yield the correct result.
Hope this helps.
Petr Savicky.
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