https://github.com/cran/spatstat
Tip revision: 1b6f7ce253524f978d8945645a567ffe709bf90a authored by Adrian Baddeley on 13 October 2016, 01:00:59 UTC
version 1.47-0
version 1.47-0
Tip revision: 1b6f7ce
quadrat.test.splitppp.Rd
\name{quadrat.test.splitppp}
\alias{quadrat.test.splitppp}
\title{Dispersion Test of CSR for Split Point Pattern Based on
Quadrat Counts}
\description{
Performs a test of Complete Spatial Randomness
for each of the component patterns in a split point pattern,
based on quadrat counts.
By default performs chi-squared tests; can also perform
Monte Carlo based tests.
}
\usage{
\method{quadrat.test}{splitppp}(X, ..., df=NULL, df.est=NULL, Xname=NULL)
}
\arguments{
\item{X}{
A split point pattern (object of class \code{"splitppp"}),
each component of which will be subjected to the goodness-of-fit test.
}
\item{\dots}{Arguments passed to \code{\link{quadrat.test.ppp}}.}
\item{df,df.est,Xname}{Arguments passed to \code{\link{pool.quadrattest}}.}
}
\details{
The function \code{quadrat.test} is generic, with methods for
point patterns (class \code{"ppp"}), split point patterns
(class \code{"splitppp"}) and point process models
(class \code{"ppm"}).
If \code{X} is a split point pattern, then for each of the
component point patterns (taken separately) we test
the null hypotheses of Complete Spatial Randomness,
then combine the result into a single test.
The method \code{quadrat.test.ppp} is applied to each
component point pattern. Then the results are pooled using
\code{\link{pool.quadrattest}} to obtain a single test.
}
\seealso{
\code{\link{quadrat.test}},
\code{\link{quadratcount}},
\code{\link{quadrats}},
\code{\link{quadratresample}},
\code{\link{chisq.test}},
\code{\link{cdf.test}}.
To test a Poisson point process model against a specific Poisson alternative,
use \code{\link{anova.ppm}}.
}
\value{
An object of class \code{"quadrattest"} which can be printed and
plotted.
}
\examples{
data(humberside)
qH <- quadrat.test(split(humberside), 2, 3)
plot(qH)
qH
}
\author{\adrian
and \rolf
}
\keyword{spatial}
\keyword{htest}