Complete Orderings with the Missing Redundant Rank

Given orderings with one rank missing, complete the ordering by assigning the remaining item(s) to the final rank.

Usage

complete(orderings, items)

Arguments

orderings

A data frame of orderings with one rank missing.

items

A vector of item names.

Value

A vector of the missing items, which will be a list if there are any ties.

Examples

# Orderings of 3 items, when only the best and worst are recorded
orderings <- data.frame(best = c("A", "B", "A"),
                        worst = c("C", "C", NA))
orderings$middle <- complete(orderings, items = c("A", "B", "C"))