anova.slrm.Rd
\name{anova.slrm}
\Rdversion{1.1}
\alias{anova.slrm}
\title{
Analysis of Deviance for Spatial Logistic Regression Models
}
\description{
Performs Analysis of Deviance for two or more fitted Spatial Logistic
Regression models.
}
\usage{
\method{anova}{slrm}(object, ..., test = NULL)
}
\arguments{
\item{object}{
a fitted spatial logistic regression model.
An object of class \code{"slrm"}.
}
\item{\dots}{
additional objects of the same type (optional).
}
\item{test}{
a character string, (partially) matching one of
\code{"Chisq"}, \code{"F"} or \code{"Cp"}, indicating the
reference distribution that should be used to compute
\eqn{p}-values.
}
}
\details{
This is a method for \code{\link[stats]{anova}} for fitted spatial logistic
regression models (objects of class \code{"slrm"}, usually obtained
from the function \code{\link{slrm}}).
The output shows the deviance differences (i.e. 2 times log
likelihood ratio), the difference in degrees of freedom, and (if
\code{test="Chi"}) the two-sided \eqn{p}-values for the chi-squared tests.
Their interpretation is very similar to that
in \code{\link[stats]{anova.glm}}.
}
\value{
An object of class \code{"anova"}, inheriting from
class \code{"data.frame"}, representing the analysis of deviance table.
}
\seealso{
\code{\link{slrm}}
}
\examples{
X <- rpoispp(42)
fit0 <- slrm(X ~ 1)
fit1 <- slrm(X ~ x+y)
anova(fit0, fit1, test="Chi")
}
\author{Adrian Baddeley
\email{adrian@maths.uwa.edu.au}
\url{http://www.maths.uwa.edu.au/~adrian/}
and Rolf Turner
\email{r.turner@auckland.ac.nz}
}
\keyword{spatial}
\keyword{models}
\keyword{methods}