https://github.com/cran/Matrix
Tip revision: 0cd9844108843d8b916475ab1080dbeb26cc2d20 authored by Douglas Bates on 24 January 2005, 00:00:00 UTC
version 0.9-1
version 0.9-1
Tip revision: 0cd9844
expand.Rd
\name{expand}
\title{Expand a Decomposition into Factors}
\usage{
expand(x, \dots)
}
\alias{expand}
\alias{expand.default}
\description{
Expands decompositions stored in compact form into factors.
}
\arguments{
\item{x}{
a matrix decomposition.
}
\item{\dots}{further arguments passed to or from other methods.}
}
\value{
the expanded decomposition.
}
\details{
This is a generic function with special methods for different types
of decompositions.
Use \code{\link{methods}("expand")} to list all the methods for the
\code{expand} generic.
}
\section{NOTE}{
Factors for decompositions such as \code{lu} and \code{qr} can be
stored in a compact form.
The function \code{expand} allows all factors to be fully expanded.
}
\seealso{
% \code{\link{expand.lu.Matrix}}, \code{\link{expand.lu.Hermitian}},
% \code{\link{expand.qr.Matrix}}, \code{\link{expand.eigen.Matrix}},
\code{\link{facmul}}.
}
\examples{
library(Matrix)
x <- Matrix( 1:9, 3, 3)
\dontrun{
expand(qr(x))
}
}
\keyword{algebra}