[R] position of an element in a vector

Roger Peng rpeng at stat.ucla.edu
Thu Feb 13 22:57:07 CET 2003

For extracting list elements, you can use the [[ operator, as in

a <- list(6, 5, 4, 3)
a[[1]] ## get '6'

For vectors, you can use [, as in

a <- c(1,2,4,3,6)

UCLA Department of Statistics
rpeng at stat.ucla.edu

On Thu, 13 Feb 2003, Jason Bond wrote:

> Hello.  Sorry for the elementary post.  I've looked through the 
> documentation, but can't seem to find a function which allows one to 
> extract the position of an element within a list...for example the position 
> of the element 4 in the vector c(1,2,4,3,6) is 3.  Thanks much for any help.
>    Jason
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
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