Lowest k values of list

Hi @ all,

how do I get the largest or lowest k values of list? It must similar  
to the min() / max() function, but I just don't get it.

Might depend on how you define "high" and "low". Consider these  
experiments:

 > z <- list(1,4,"5",6,,2,3)
 > head(sort(unlist(z)),n=2)
[1] "1" "2"
 > tail(sort(unlist(z)),n=2)
[1] "5" "6"


 > z <- list(1,2,3,4,"5",6,"a")
 > tail(sort(unlist(z)),n=2)
[1] "6" "a"
 > head(sort(unlist(z)),n=2)
[1] "1" "2"

David Winsemius