[R] Returning positions of a vector

[Sundar Dorai-Raj]

Mike Jones wrote:
> Hi,
> 
> I'd like to return the rows of sampled values of a vector.  Can't figure
> out how to do it.
> 
> For example:  I start with [3, 1, 7, 4, 10] that have position
> [1,2,3,4,5].  I sample [10,1,4] and I want to return [5,2,4].  
> 
> I'm sure there's a simple way to do that but haven't been able to figure
> it out or locate it.
> 
> Thanks in advance...mj

Try ?match.

x <- c(3, 1, 7, 4, 10)
match(c(10, 1, 4), x)

HTH,

--sundar