vcdExtra (version 0.7-1)

modFit: Brief Summary of Model Fit for a glm or loglm Object

Description

Formats a brief summary of model fit for a glm or loglm object, showing the likelihood ratio Chisq (df) value and or AIC. Useful for inclusion in a plot title or annotation.

Usage

modFit(x, ...)
# S3 method for glm
modFit(x, stats="chisq", digits=2, ...)
# S3 method for loglm
modFit(x, stats="chisq", digits=2, ...)

Arguments

x

A glm or loglm object

…

Arguments passed down

stats

One or more of chisq or aic, determining the statistics displayed.

digits

Number of digits after the decimal point in displayed statistics.

Value

A character string containing the formatted values of the chosen statistics.

See Also

Summarise (soon to be deprecated), LRstats

Examples

# NOT RUN {
data(Mental)
require(MASS)
(Mental.tab <- xtabs(Freq ~ ses+mental, data=Mental))
(Mental.mod <- loglm(~ses+mental, Mental.tab))
Mental.mod
modFit(Mental.mod)

# use to label mosaic()
mosaic(Mental.mod, main=paste("Independence model,", modFit(Mental.mod)))
# }