Aliases: setops intersect union setdiff setequal is.element
Keywords:
### ** Examples intersect(1:5, 4:8)
[1] 4 5
union(1:5, 4:8)
[1] 1 2 3 4 5 6 7 8
setdiff(1:5, 4:8)
[1] 1 2 3
setdiff(4:8, 1:5)
[1] 6 7 8