trotter (version 0.6)

length,SPV-method: Selections Pseudo-Vector Length

Description

Get the length of an SPV instance.

Usage

"length"(x)

Arguments

x

an instance of SPV

Value

the number of selections (combinations with replacement) in pseudo-vector x

Details

Since x contains all the k-selections of objects in vector items, length(x) will return choose(length(items) + k - 1, k).

See Also

Permutations Pseudo-Vector ppv

Combinations Pseudo-Vector cpv

Amalgams Pseudo-Vector apv

Subsets Pseudo-Vector sspv