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% File nlme/man/update.modelStruct.Rd
% Part of the nlme package for R
% Distributed under GPL 2 or later: see nlme/LICENCE.note
\name{update.modelStruct}
\title{Update a modelStruct Object}
\usage{
\method{update}{modelStruct}(object, data, \dots)
}
\alias{update.modelStruct}
\alias{update.corStruct}
\alias{update.reStruct}
\arguments{
\item{object}{an object inheriting from class \code{"modelStruct"},
representing a list of model components, such as \code{corStruct} and
\code{varFunc} objects.}
\item{data}{a data frame in which to evaluate the variables needed for
updating the elements of \code{object}.}
\item{\dots}{some methods for this generic require additional
arguments. None are used in this method.}
}
\description{
This method function updates each element of \code{object}, allowing
the access to \code{data}.
}
\value{
an object similar to \code{object} (same class, length, and names),
but with updated elements.
}
\author{José Pinheiro and Douglas Bates \email{bates@stat.wisc.edu}}
\seealso{
\code{\link{reStruct}}
}
\note{This method function is primarily used within model fitting
functions, such as \code{lme} and \code{gls}, that allow model
components such as variance functions.}
\keyword{models}
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