[R] extract values from a vector

[Chuck Cleland]

Antje wrote:
> Hello,
> 
> I'm looking for a solution for the following problem:
> I have two vectors
> 
> V1 <- c("apple","honey","milk","bread","butter")
> V2 <- c("bread","milk")
> 
> now, I would like to know for each element in V1 if it's equal to one of 
> the elements in V2
> I could do:
> which(V1 == V2[1] | V1 == V2[2])
> 
> but what if I don't know the length of V2 and it's content???

V1 %in% V2
[1] FALSE FALSE  TRUE  TRUE FALSE

or

is.element(V1, V2)
[1] FALSE FALSE  TRUE  TRUE FALSE

?is.element

> Thank you in advance!
> 
> Antje
> 
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-- 
Chuck Cleland, Ph.D.
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