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% File nlme/man/Variogram.Rd
% Part of the nlme package for R
% Distributed under GPL 2 or later: see nlme/LICENCE.note
\name{Variogram}
\title{Calculate Semi-variogram}
\usage{
Variogram(object, distance, \dots)
}
\alias{Variogram}
\arguments{
\item{object}{a numeric vector with the values to be used for
calculating the semi-variogram, usually a residual vector from a
fitted model.}
\item{distance}{a numeric vector with the pairwise distances
corresponding to the elements of \code{object}. The order of the
elements in \code{distance} must correspond to the pairs
\code{(1,2), (1,3), \dots, (n-1,n)}, with \code{n} representing the
length of \code{object}, and must have length \code{n(n-1)/2}.}
\item{\dots}{some methods for this generic function require additional
arguments.}
}
\description{
This function is generic; method functions can be written to handle
specific classes of objects. Classes which already have methods for
this function include \code{"gls"} and \code{"lme"}; there is also
a default method for arbitrary vectors (of residuals). See
the appropriate method documentation for a description of the
arguments.
}
\value{
will depend on the method function used; see the appropriate documentation.
}
\references{
Cressie, N.A.C. (1993), "Statistics for Spatial Data", J. Wiley &
Sons.
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models
in S and S-PLUS", Springer.
}
\author{José Pinheiro and Douglas Bates \email{bates@stat.wisc.edu}}
\seealso{
\code{\link{Variogram.corExp}},
\code{\link{Variogram.corGaus}},
\code{\link{Variogram.corLin}},
\code{\link{Variogram.corRatio}},
\code{\link{Variogram.corSpatial}},
\code{\link{Variogram.corSpher}},
\code{\link{Variogram.default}},
\code{\link{Variogram.gls}},
\code{\link{Variogram.lme}},
\code{\link{plot.Variogram}}
}
\keyword{models}
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