multiplex (version 1.6)

fltr: Principal filter

Description

A function to find principal filter in a partial order

Usage

fltr(e, PO, rclos = TRUE)

Arguments

e

the reference element in the partial order

PO

the partial order

rclos

(logical) apply reflexive closure?

Value

• A vector with elements belonging to the principal filter (or ideal) of the reference node in the partial order.

Details

This function helps to find principal filters in a partial order structure, or else principal ideals in case we use the transpose of the partial order.

See Also

galois, partial.order, diagram

Examples

## Create a data frame
dfr <- data.frame(x=1:3, y=5:7)

## Partial ordering of concepts
PO <- partial.order(galois(dfr),"galois")

## Filter for the first element
fltr(1, PO, rclos=TRUE)