[R] extract values from a vector

[Doran, Harold]

You could do this

> V1 <- c("apple","honey","milk","bread","butter")
> V2 <- c("bread","milk")
> intersect(V1,V2)
[1] "milk"  "bread"
> setdiff(V1,V2)
[1] "apple"  "honey"  "butter" 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Antje
> Sent: Wednesday, November 01, 2006 8:50 AM
> To: R-help at stat.math.ethz.ch
> Subject: [R] extract values from a vector
> 
> 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???
> 
> Thank you in advance!
> 
> Antje
> 
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