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Number of Combinations of a Set

Source: R/combN.R
combN.Rd

Return the number of combinations with and without replacement and order.

Usage

combN(n, m, replace = FALSE, ordered = FALSE)

Arguments

n

number of elements from which to choose.

m

number of elements to choose. For combSet can m be a numeric vector too.

replace

logical; whether repetition of the same element is allowed. Defaults to FALSE.

ordered

logical. Does the order matter? Default is FALSE.

Value

a numeric value.

See also

combn(), choose(), factorial(), vignette("Combinatorics", package = "bedrock")

Other combinatorics: combPairs(), combSet(), pairApply(), permn(), randGroupSplit(), sampleX()

Examples

n <- 5; m <- 2
combN(n, m, replace=TRUE, ordered=FALSE)
#> [1] 15
combN(n, m, replace=TRUE, ordered=TRUE)
#> [1] 25
combN(n, m, replace=FALSE, ordered=TRUE)
#> [1] 20
combN(n, m, replace=FALSE, ordered=FALSE)
#> [1] 10