GWRM (version 2.1.0.4)

add1.gw: Add All Possible Single Terms to a GWRM Model

Description

Compute all the single terms in the scope argument that can be added to the GWRM model, fit those models and compute a table of the changes in fit.

Usage

# S3 method for gw
add1(object, scope, test = c("none", "Chisq"), k = 2, trace = FALSE, ...)

Arguments

object

a fitted object of class inheriting from "gw".

scope

a formula giving the terms to be considered for adding.

test

"none", which considers the AIC criterion, or Chisq, which is the likelihood-ratio test.

k

the penalty constant in AIC / Cp.

trace

if TRUE, print out progress reports.

...

further arguments passed to or from other methods.

Value

An object of class "anova" summarizing the differences in fit between the models.

Examples

# NOT RUN {
data(goals)
fit0 <- gw(goals ~ offset(log(played)), data = goals)
summary(fit0)

fit1 <- add1(fit0, ~ position)
summary(fit1)

# }