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  Summarize information about installed packages and packages
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  Summarize information about installed packages and packages
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  available at various repositories, and automatically upgrade outdated
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  available at various repositories, and automatically upgrade outdated
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  packages.
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  packages.
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}
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}
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\usage{
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\usage{
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packageStatus(lib.loc = NULL, repositories = NULL, method)
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packageStatus(lib.loc = NULL, repositories = NULL, method,
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              type = getOption("pkgType"))
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\method{summary}{packageStatus}(object, \dots)
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\method{summary}{packageStatus}(object, \dots)
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\method{update}{packageStatus}(object, lib.loc = levels(object$inst$LibPath),
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\method{update}{packageStatus}(object, lib.loc = levels(object$inst$LibPath),
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       repositories = levels(object$avail$Repository), \dots)
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       repositories = levels(object$avail$Repository), \dots)
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    library trees to search through, or \code{NULL}.  The default value
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    library trees to search through, or \code{NULL}.  The default value
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    of \code{NULL} corresponds to all libraries currently known.}
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    of \code{NULL} corresponds to all libraries currently known.}
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  \item{repositories}{a character vector of URLs describing the location of \R
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  \item{repositories}{a character vector of URLs describing the location of \R
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    package repositories on the Internet or on the local machine.}
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    package repositories on the Internet or on the local machine.}
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  \item{method}{Download method, see \code{\link{download.file}}.}
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  \item{method}{Download method, see \code{\link{download.file}}.}
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  \item{type}{type of package distribution:
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    see \code{\link{install.packages}}.}
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  \item{object}{an object of class \code{"packageStatus"} as returned by
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  \item{object}{an object of class \code{"packageStatus"} as returned by
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    \code{packageStatus}.}
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    \code{packageStatus}.}
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  \item{ask}{if \code{TRUE}, the user is prompted which packages should
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  \item{ask}{if \code{TRUE}, the user is prompted which packages should
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    be upgraded and which not.}
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    be upgraded and which not.}
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  \item{\dots}{currently not used.}
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  \item{\dots}{currently not used.}