Revision 702c47d9ac5fcb4662465063f86ff1aa6cdaee12 authored by Martin Schlather on 20 January 2006, 00:00:00 UTC, committed by Gabor Csardi on 20 January 2006, 00:00:00 UTC
1 parent 6fb75ab
parameter.range.Rd
\name{parameter.range}
\alias{parameter.range}
\title{Range of model specific parameters}
\description{
\code{parameter.range} returns the range of the parameters specific to
a parametrised variogram model or a covariance function
}
\usage{
parameter.range(model, dim)
}
\arguments{
\item{model}{the variogram model or covariance function, see \code{CovarianceFct}}
\item{dim}{the dimension of the random field}
}
\value{
If the model is not valid or not specified for the given dimension,
\code{NaN} is returned.
If the model does not have additional parameters, \code{NULL} is
returned. Otherwise a list is returned.
If the parameter space is simple, a list of the following elements
is returned
\item{theoretical}{The theoretical ranges of the parameters. Note that
open and closed intervals are not distinguished here.}
\item{practical}{The ranges of the parameters usually not exceeded in
practical applications.}
Both elements are matrices with two rows and the number of columns
being the number of parameters.
\cr\cr
If the parameter space is complex, the parameter space is devided into
rectangular areas and \code{theoretical} and \code{practical} are
lists where each element is a matrix as above.
}
\author{Martin Schlather, \email{schlath@hsu-hh.de}
\url{http://www.unibw-hamburg.de/WWEB/math/schlath/schlather.html}}
\seealso{\command{\link{CovarianceFct}}}
\examples{
parameter.range("exponential", 1) # NULL
str(parameter.range("power", 1))
str(parameter.range("power", 2))
str(parameter.range("gengneiting", 2))
str(parameter.range("nsst",1))
str(parameter.range("nsst2",1))
str(parameter.range("hyper",1))
}
\keyword{spatial}
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