Question

I want to know all the values in c(1, 4, 5, 9, 10) that are not in c(1, 5, 10, 11, 13). How do I do that with one built-in function in R? How could I do it if that function didn't exist?

Answer 1

setdiff(c(1, 4, 5, 9, 10), c(1, 5, 10, 11, 13)) and c(1, 4, 5, 9, 10)[!c(1, 4, 5, 9, 10) %in% c(1, 5, 10, 11, 13).