poseticDataAnalysis (version 1.0.0)

IsUpset: Checking upsets.

Description

Checks whether the input elements form an upset, in the input poset.

Usage

IsUpset(poset, elements)

Value

A boolean value.

Arguments

poset

An object of S4 class POSet. Argument poset must be created by using any function contained in the package aimed at building object of S4 class POSet (e.g. POSet(), LinearPOSet(), ProductPOSet(), ...) .

elements

A vector of character strings (the names of the input elements).

Examples

elems <- c("a", "b", "c", "d")

dom <- matrix(c(
  "a", "b",
  "c", "b",
  "b", "d"
), ncol = 2, byrow = TRUE)

pos <- POSet(elements = elems, dom = dom)

chk <- IsUpset(pos, c("a", "b", "c"))