Setoperations {gRbase}R Documentation

Set operations

Description

Miscellaneous set operations.

Usage

is.subsetof(x, set)
is.insetlist(x, setlist, index=FALSE)
removeRedundant(setlist, maximal = TRUE, index = FALSE)

Arguments

x, set Vectors representing sets
setlist List of vectors (representing a set of subsets)
maximal Logical; see section 'Details' for a description.
index Logical; should indices (in setlist) be returned or a set of subsets.

Details

'setlist' is a list of vectors representing a set of subsets; i.e. V1,...VQ where Vk is a subset of some base set V.

is.insetlist: Checks if the set x is in one of the Vk's.

removeRedundant: Returns those Vk which are not contained in other subsets; i.e. gives the maximal sets. If maximal is FALSE then returns the minimal sets; i.e. Vk is returned if Vk is contained in one of the other sets Vl and there are no set Vn contained in Vk.

Notice that the comparisons are made by turning the elements into characters and then comparing these. Hence 1 is identical to "1".

Author(s)

Søren Højsgaard, sorenh@agrsci.dk

Examples


is.subsetof(c(1,2),c(1,2,3))
is.subsetof(c(1,2,3), c(1,2))

l <- list(c(1,2),c(1,2,3),c(2,4),c(5,6), 5)

#subsetofList(c(1,2), l)
#subsetofList(c(1,2,3,4), l)

removeRedundant(l)
removeRedundant(l, maximal=FALSE)

is.insetlist (c(2,4), l)
is.insetlist (c(2,8), l)


[Package gRbase version 1.1.2 Index]