powerSet: Power Set

In rje42/rje: Miscellaneous Useful Functions for Statistics

Power Set

Description

Produces the power set of a vector.

Usage

powerSet(x, m, rev = FALSE)

powerSetCond(x, y, m, rev = FALSE, sort = FALSE)

Arguments

x	vector of elements (the set).
m	maximum cardinality of subsets
rev	logical indicating whether to reverse the order of subsets.
y	set to condition on
sort	logical: should sets be sorted?

Details

Creates a list containing every subset of the elements of the vector x.

powerSet returns subsets up to size m (if this is specified). powerSetCond includes some non-empty subset of x in every set.

Value

A list of vectors of the same type as x.

With rev = FALSE (the default) the list is ordered such that all subsets containing the last element of x come after those which do not, and so on.

Functions

• powerSetCond(): Add sets that can't be empty

Author(s)

Robin Evans

See Also

powerSetMat.

Examples

powerSet(1:3)
powerSet(letters[3:5], rev=TRUE)
powerSet(1:5, m=2)

powerSetCond(2:3, y=1)

rje42/rje documentation built on April 3, 2024, 11:08 p.m.