On Jan 15, 2011, at 4:06 PM, Jonathan Flowers wrote:
Hi all,
I would like to iterate through a list with named elements and
access the
names within an lapply / sapply call. One way to do this is iterate
through
the names and index the list with the name. Is there a way to iterate
through the list elements themselves and access the element names
within in
the function? For example,
mylist <- list("a"=c(1,2),"b"=c(3,4),"c"=c(5,6))
sapply(mylist,function(x){
#get name of list elements ("a", "b", "c")
#then do other stuff
})
You can pass this result to "[[":
> names(sapply(mylist, names))
[1] "a" "b" "c"
> sapply( names(sapply(mylist, names)) , function(x) mylist[[x]]^2)
a b c
[1,] 1 9 25
[2,] 4 16 36
Thanks for your suggestions.
Jonathan
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