GenDavidson
(Package: BradleyTerry2) :
Specify a Generalised Davidson Term in a gnm Model Formula
GenDavidson is a function of class "nonlin" to specify a generalised Davidson term in the formula argument to gnm, providing a model for paired comparison data where ties are a possible outcome.
● Data Source:
CranContrib
● Keywords: models, nonlinear
● Alias: GenDavidson
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BTm
(Package: BradleyTerry2) :
Bradley-Terry Model and Extensions
Fits Bradley-Terry models for pair comparison data, including models with structured scores, order effect and missing covariate data. Fits by either maximum likelihood or maximum penalized likelihood (with Jeffreys-prior penalty) when abilities are modelled exactly, or by penalized quasi-likelihood when abilities are modelled by covariates.
● Data Source:
CranContrib
● Keywords: models
● Alias: BTm
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countsToBinomial
(Package: BradleyTerry2) :
Convert Contingency Table of Wins to Binomial Counts
Convert a contingency table of wins to a four-column data frame containing the number of wins and losses for each pair of players.
● Data Source:
CranContrib
● Keywords: models
● Alias: countsToBinomial
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add1.BTm
(Package: BradleyTerry2) :
Add or Drop Single Terms to/from a Bradley Terry Model
Add or drop single terms within the limit specified by the scope argument. For models with no random effects, compute an analysis of deviance table, otherwise compute the Wald statistic of the parameters that have been added to or dropped from the model.
● Data Source:
CranContrib
● Keywords: models
● Alias: add1.BTm, drop1.BTm
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anova.BTm
(Package: BradleyTerry2) :
Compare Nested Bradley Terry Models
Compare nested models inheriting from class "BTm". For models with no random effects, compute analysis of deviance table, otherwise compute Wald tests of additional terms.
● Data Source:
CranContrib
● Keywords: models
● Alias: anova.BTm
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Obtain predictions and optionally standard errors of those predictions from a "BTglmmPQL" object.
● Data Source:
CranContrib
● Keywords: models
● Alias: predict.BTglmmPQL
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Plot proportions of tied matches and non-tied matches won by the first player, within matches binned by the relative player ability, as expressed by the probability that the first player wins, given the match is not a tie. Add fitted lines for each set of matches, as given by the generalized Davidson model.
● Data Source:
CranContrib
● Keywords: models, nonlinear
● Alias: plotProportions
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Fits GLMMs with simple random effects structure via Breslow and Clayton's PQL algorithm.
● Data Source:
CranContrib
● Keywords: models
● Alias: glmmPQL
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Computes residuals from a model object of class "BTm". In additional to the usual options for objects inheriting from class "glm", a "grouped" option is implemented to compute player-specific residuals suitable for diagnostic checking of a predictor involving player-level covariates.
● Data Source:
CranContrib
● Keywords: models
● Alias: residuals.BTm
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2 images
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BTabilities
(Package: BradleyTerry2) :
Estimated Abilities from a Bradley-Terry Model
Computes the (baseline) ability of each player from a model object of class "BTm".
● Data Source:
CranContrib
● Keywords: models
● Alias: BTabilities, coef.BTabilities, print.BTabilities, vcov.BTabilities
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