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\title{
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\title{
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   Show Package Maintainer
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   Show Package Maintainer
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}
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}
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\description{
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\description{
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  Show the name and email address of the maintainer of a package.
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  Show the name and email address of the maintainer of an installed package.
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}
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}
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\usage{
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\usage{
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maintainer(pkg)
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maintainer(pkg)
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}
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}
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\arguments{
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\arguments{
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   \item{pkg}{Character string.  The name of a single package.}
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   \item{pkg}{a character string, the name of an installed package.}
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}
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}
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\details{
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\details{
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   Accesses the package description to return the name and email address of
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   Accesses the \link[=packageDescription]{package description}
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   the maintainer.
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   to return the name and email address of the maintainer.
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   Questions about contributed packages should often be addressed to
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   Questions about contributed packages should often be addressed to
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   the package maintainer; questions about base packages should
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   the package maintainer; questions about base packages should
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   usually be addressed to the R-help or R-devel mailing lists.  Bug
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   usually be addressed to the R-help or R-devel mailing lists.  Bug
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   reports should be submitted using the \code{\link{bug.report}}
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   reports should be submitted using the \code{\link{bug.report}}
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   function.
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   function.
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}
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}
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\value{
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\value{
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   A character string giving the name and email address of the maintainer
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   A character string giving the name and email address of the maintainer
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   of the package, or \code{NA} if no such package is installed.
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   of the package, or \code{NA_character_} if no such package is installed.
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}
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}
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\author{
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\author{
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 David Scott <d.scott@auckland.ac.nz> from code on R-help originally
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 David Scott \email{d.scott@auckland.ac.nz} from code on R-help originally
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 due to Charlie Sharpsteen <source@sharpsteen.net>; multiple corrections
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 due to Charlie Sharpsteen \email{source@sharpsteen.net}; multiple corrections
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 by R-core.
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 by R-core.
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}
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}
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\references{
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\references{
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  \url{https://stat.ethz.ch/pipermail/r-help/2010-February/230027.html}
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  \url{https://stat.ethz.ch/pipermail/r-help/2010-February/230027.html}
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}
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}
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% failed 2011-07-07
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% \references{
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% \url{http://n4.nabble.com/R-help-question-How-can-we-enable-useRs-to-contribute-corrections-to-help-files-faster-tp1572568p1572868.html}
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% }
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\seealso{
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\seealso{
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\code{\link{packageDescription}}, \code{\link{bug.report}}
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\code{\link{packageDescription}}, \code{\link{bug.report}}
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}
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}
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\examples{
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\examples{
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maintainer("MASS")
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maintainer("MASS")