Set operations

Union (union()), intersect (intersect()), difference (setdiff()), and equality (setequal()) for two vectors representing sets. Determine membership with is.element().

Usage

intersect(x, y, ...)

union(x, y, ...)

setdiff(x, y, ...)

setequal(x, y, ...)

is.element(el, set, ...)

Arguments

x, y

Vectors to combine.

...

Other arguments passed on to methods.

el, set

Element and set to compare.

Value

For union(), intersect(), and setdiff(), a vector with all duplicate removed.

For setequal() and is.element(), a logical TRUE or FALSE.`

Details

These functions override the set functions provided in base to make them generic so that packages can provide methods for different data types. The default methods call the base versions.

Methods

intersect()

No methods found in currently loaded packages.

union()

No methods found in currently loaded packages.

setdiff()

No methods found in currently loaded packages.

setequal()

No methods found in currently loaded packages.

is.element()

No methods found in currently loaded packages.

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