\name{RPchi2}
\alias{RPchi2}
\title{Simulation of a Chi2 Random Fields}
\description{
\command{RPchi2} defines a chi2 fields.
}
\usage{
RPchi2(phi, f)
}
\arguments{
\item{phi}{the \command{\link{RMmodel}}. If a model for the
distribution is not specified, \command{\link{RPgauss}} is used as
default and a covariance model is expected.}
\item{f}{integer. Degree of freedom.}
}
\value{
The function returns an object of class \code{\link[=RMmodel]{RMmodel}}
}
\author{Martin Schlather, \email{schlather@math.uni-mannheim.de}
\url{http://ms.math.uni-mannheim.de/de/publications/software}
}
\seealso{
\command{\link{Auxiliary RMmodels}},
\command{\link{RP}},
\command{\link{RPgauss}}
}
\keyword{spatial}
\examples{
RFoptions(seed=0) ## *ANY* simulation will have the random seed 0; set
## RFoptions(seed=NA) to make them all random again
model <- RPchi2(RMexp(), f=2)
x <- seq(0, 10, if (interactive()) 0.01 else 2)
z <- RFsimulate(model=model, x, x, n=4)
plot(z)
\dontshow{FinalizeExample()}
}