itemTuples: Create item tuples.

In eatATA: Create Constraints for Small Test Assembly Problems

Create item tuples.

Description

If item inclusions or exclusions are stored as a character vector, itemTuples separates this vector and creates item pairs ('tuples').

Usage

itemTuples(items, idCol = "ID", infoCol, sepPattern = ", ")

Arguments

items	A data.frame with information on an item pool.
idCol	character or integer indicating the item ID column in items.
infoCol	character or integer indicating the column in items which contains information on the tuples.
sepPattern	String which should be used for separating item IDs in the infoCol column.

Details

Tuples can be used by itemExclusionConstraint to set up exclusion constraints and by itemInclusionConstraint to set up inclusion constraints. Note that a separator pattern has to be used consistently throughout the column (e.g. ", ").

Value

A data.frame with two columns.

Examples

# Example data.frame
items <- data.frame(ID = c("item1", "item2", "item3", "item4"),
                     exclusions = c("item2, item3", NA, NA, NA))

# Create tuples
itemTuples(items = items, idCol = "ID", infoCol = 2,
                    sepPattern = ", ")

eatATA documentation built on May 29, 2024, 2:56 a.m.