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% $Id: varComb.Rd,v 1.5.2.1 2003/04/17 22:28:45 bates Exp $
\name{varComb}
\title{Combination of Variance Functions}
\usage{
varComb(\dots)
}
\alias{varComb}
\arguments{
\item{\dots}{objects inheriting from class \code{varFunc} representing
variance function structures.}
}
\description{
This function is a constructor for the \code{varComb} class,
representing a combination of variance functions. The corresponding
variance function is equal to the product of the variance functions of
the \code{varFunc} objects listed in \code{\dots}.
}
\value{
a \code{varComb} object representing a combination of variance
functions, also inheriting from class \code{varFunc}.
}
\references{
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models
in S and S-PLUS", Springer.
}
\author{Jose Pinheiro \email{Jose.Pinheiro@pharma.novartis.com} and Douglas Bates \email{bates@stat.wisc.edu}}
\seealso{
\code{\link{varClasses}},
\code{\link{varWeights.varComb}},
\code{\link{coef.varComb}}}
\examples{
vf1 <- varComb(varIdent(form = ~1|Sex), varPower())
}
\keyword{models}
|
