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Set Operations

Source: R/setops64.R
sets.Rd

Performs set union, intersection, (asymmetric!) difference, equality and membership on two vectors. As soon as an integer64 vector is involved, the operations are performed using integer64 semantics. Otherwise the base package functions are called.

Usage

union(x, y)

intersect(x, y)

setequal(x, y)

setdiff(x, y)

is.element(el, set)

Arguments

x, y, el, set

vectors (of the same mode) containing a sequence of items (conceptually) with no duplicated values.

Value

For union, a vector of a common mode or class.

For intersect, a vector of a common mode or class, or NULL if x or y is NULL.

For setdiff, a vector of the same mode or class as x.

A logical scalar for setequal and a logical of the same length as x for is.element.

See also

base::union

Examples

x <- as.integer64(1:5)
y <- c(1L, 3L, 5L, 7L)
union(x, y)
#> integer64
#> [1] 1 2 3 4 5 7
intersect(x, y)
#> integer64
#> [1] 1 3 5
setdiff(x, y)
#> integer64
#> [1] 2 4
setequal(x, y)
#> [1] FALSE
is.element(x, y)
#> [1]  TRUE FALSE  TRUE FALSE  TRUE