choices {prefio}

Choices Object

Description

Convert a set of preferences to a list of choices, alternatives, and preferences.

Usage

choices(preferences, names = FALSE)

Arguments

preferences

a preferences object, or an object that can be coerced by as.preferences.

names

logical: if TRUE use the object names in the returned choices object, else use object indices.

Value

A data frame of class choices with elements:

choices

A list where each element represents the items chosen for a single rank in the ordering.

alternatives

A list where each element represents the alternatives (i.e. the set of remaining items to choose from) for a single rank.

ordering

A list where each element represents the ordering that the choice belongs to.

The list stores the number of choices and the names of the objects as the attributes nchoices and objects respectively.

Examples

R <- matrix(c(
  1, 2, 0, 0,
  4, 1, 2, 3,
  2, 1, 1, 1,
  1, 2, 3, 0,
  2, 1, 1, 0,
  1, 0, 3, 2
), nrow = 6, byrow = TRUE)
colnames(R) <- c("apple", "banana", "orange", "pear")
R <- preferences(R, format = "ranking")

actual_choices <- choices(R, names = TRUE)
actual_choices[1:6, ]

coded_choices <- choices(R, names = FALSE)
coded_choices[1:2, ]
as.data.frame(coded_choices)[1:2, ]
attr(coded_choices, "objects")