union(x, y) intersect(x, y) setdiff(x, y) is.element(el, set) x %in% table setequal(x, y)
| el, x | a vector of potential elements of the set. |
| set, table | a vector containing all elements of the set. It should not contain duplicate elements. Duplicates are silently removed. |
| x | a vector representing a set (like the set argument). It is replaced by as.vector(x). |
| y | a vector representing a set (like the set argument). It is replaced by as.vector(y). |
| union | returns a vector of items in one or both of x and y. |
| intersect | returns a vector of items in both x and y. |
| setdiff | returns the elements in x that are not in y. |
| is.element | returns a logical vector the length of el indicating whether the items in el are elements of the specified set. |
| "x %in% table" | identical to is.element. A special operator. |
| setequal | returns TRUE if the two datasets are equal. That is, if all elements of x are in y and vice versa. |
x <- c(2, 3, 4) y <- c(3, 4, 5)union(x, y) intersect(x, y)
setdiff(x, y)
is.element(c("Belgium", "Rhode Island"), Sdatasets::state.name)
c("Belgium", "Rhode Island") %in% Sdatasets::state.name
setequal(union(x, y), union(y, x))