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\name{keep}
\alias{keep}
\title{Remove All Objects, Except Those Specified}
\description{
Remove all objects from the user workspace, except those specified.
}
\usage{
keep(\dots, list=character(), all=FALSE, sure=FALSE)
}
\arguments{
\item{\dots}{objects to be kept, specified one by one, quoted or
unquoted.}
\item{list}{character vector of object names to be kept.}
\item{all}{whether hidden objects (beginning with a \code{.}) should
be removed, unless explicitly kept.}
\item{sure}{whether to perform the removal, otherwise return names of
objects that would be removed.}
}
\details{
Implemented with safety caps: objects whose name starts with a
\code{.} are not removed unless \code{all=TRUE}, and an explicit
\code{sure=TRUE} is required to remove anything.
}
\value{
A character vector containing object names that are deleted if
\code{sure=TRUE}.
}
\author{Arni Magnusson}
\seealso{
\code{keep} is a convenient interface to \code{\link{rm}} for removing
most objects from the user workspace.
}
\examples{
data(trees, CO2)
keep(trees)
# To remove all objects except trees, run:
# keep(trees, sure=TRUE)
}
\keyword{data}
\keyword{environment}
\keyword{utilities}
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