[R] Using grep

[Doran, Harold]

A <- seq(200,210,1) 
B <- c(201,204,209)
which(A %in% B)


> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of mentor_
> Sent: Wednesday, October 08, 2008 11:19 AM
> To: r-help at r-project.org
> Subject: [R] Using grep
> 
> 
> Hi,
> 
> I have a vector A with (200, 201, 202, 203, 204, ... 210) and 
> a vector B with (201, 204, 209).
> Now I would like to get the position in vector A matches with 
> the entries in vector B So what I want to have is the 
> following result:
> [1] 2 5 10
> 
> I tried the following:
> grep(B, A)
> 
> grep(c(B), A)
> 
> A <- as.character(A)
> B <- as.character(B)
> 
> grep(B, A)
> grep(c(B), A)
> 
> and several other combinations. But nothing is giving me the 
> right result?!
> Does anyone know why?
> 
> Cheers,
> Mentor
> --
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