sub-PPV-method: Retrieve a Permutation by Index

In trotter: Pseudo-Vectors Containing All Permutations, Combinations and Subsets of Objects Taken from a Vector.

Description

Access a permutation stored in a PPV instance by index.

Usage

## S4 method for signature 'PPV'
x[i, j, drop]

Arguments

x	an instance of PPV.
i	an index specifying the position of the sought permutation.
j	not used.
drop	not used.

Details

The permutation at index i of pseudo-vector x is not actually stored in memory but calculated as needed. The extract method is used solely for interpretation.

Value

the permutation located at position i in pseudo-vector x

See Also

Combinations Pseudo-Vector cpv

Amalgams Pseudo-Vector apv

Selections Pseudo-Vector spv

Subsets Pseudo-Vector sspv

trotter documentation built on May 2, 2019, 1:27 p.m.