BTabilities {BradleyTerry}R Documentation

estimated abilities in a Bradley-Terry model

Description

Extracts the abilities component from a model object of class BTm.

Usage

BTabilities(model)

Arguments

model a model object for which inherits(model, "BTm") is TRUE

Value

A two-column numeric matrix, with columns named "ability" and "se"; one row for each player.

Author(s)

David Firth

References

Firth, D. (2005) Bradley-Terry models in R. Journal of Statistical Software, to appear.

See Also

BTm, BTresiduals

Examples

data(citations)
origin <- factor(c("UK", "USA", "USA", "UK"))
citeModel2 <- BTm(citations ~ origin)
BTabilities(citeModel2)

[Package BradleyTerry version 0.8-7 Index]