relrisk.Rd
\name{relrisk}
\alias{relrisk}
\title{
Estimate of Spatially-Varying Relative Risk
}
\description{
Generic command to estimate the
spatially-varying probability of each type of point, or the ratios of
such probabilities.
}
\usage{
relrisk(X, \dots)
}
\arguments{
\item{X}{
Either a point pattern (class \code{"ppp"})
or a fitted point process model (class \code{"ppm"})
from which the probabilities will be estimated.
}
\item{\dots}{
Additional arguments appropriate to the method.
}
}
\details{
In a point pattern containing several different types of points,
we may be interested in the spatially-varying probability of each
possible type, or the relative risks which are the
ratios of such probabilities.
The command \code{\link{relrisk}} is generic and can be used to
estimate relative risk in different ways.
The function \code{\link{relrisk.ppp}} is the method for point pattern
datasets. It computes \emph{nonparametric} estimates of relative risk
by kernel smoothing.
The function \code{\link{relrisk.ppm}} is the method for fitted point
process models (class \code{"ppm"}). It computes \emph{parametric}
estimates of relative risk, using the fitted model.
}
\seealso{
\code{\link{relrisk.ppp}},
\code{\link{relrisk.ppm}}.
}
\author{\adrian
\rolf
and \ege
}
\keyword{spatial}