user1357015 user1357015 - 1 month ago 6
R Question

R Select multiple elements from a list

I have a list in R some 10,000 elements long. Say I want to select only elements, 5, 7, and 9. I'm not sure how I would do that without a for loop.

I want to do something like

mylist[[c(5,7,9]]
but that doesn't work. I've also tried the lapply function but haven't been able to get that working either..

Thanks for your help!

Answer

mylist[c(5,7,9)] should do it.

You want the sublists returned as sublists of the result list; you don't use [[]] (or rather, the function is [[) for that -- as Dason mentions in comments, [[ grabs the element.