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% File nlme/man/Names.pdMat.Rd
% Part of the nlme package for R
% Distributed under GPL 2 or later: see nlme/LICENCE.note
\name{Names.pdMat}
\title{Names of a pdMat Object}
\usage{
\method{Names}{pdMat}(object, \dots)
\method{Names}{pdMat}(object, \dots) <- value
}
\alias{Names.pdMat}
\alias{Names<-.pdMat}
\arguments{
\item{object}{an object inheriting from class \code{"\link{pdMat}"},
representing a positive-definite matrix.}
\item{value}{a character vector with the replacement values for the
column and row names of the matrix represented by \code{object}. It
must have length equal to the dimension of the matrix
represented by \code{object} and, if names have been previously
assigned to \code{object}, it must correspond to a permutation of the
original names.}
\item{\dots}{some methods for this generic require additional
arguments. None are used in this method.}
}
\description{
This method function returns the fist element of the \code{Dimnames}
attribute of \code{object}, which contains the column names of the
matrix represented by \code{object}.
}
\value{
if \code{object} has a \code{Dimnames} attribute then the first
element of this attribute is returned; otherwise \code{NULL}.
}
\author{José Pinheiro and Douglas Bates \email{bates@stat.wisc.edu}}
\section{SIDE EFFECTS}{
On the left side of an assignment, sets the \code{Dimnames} attribute
of \code{object} to \code{list(value, value)}.
}
\seealso{\code{\link{Names}}, \code{\link{Names.pdBlocked}}}
\examples{
pd1 <- pdSymm(~age, data = Orthodont)
Names(pd1)
}
\keyword{models}
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