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  \R package version numbers are of the form \code{x.y-z} for integers
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  \R package version numbers are of the form \code{x.y-z} for integers
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  \code{x}, \code{y} and \code{z}, with components after \code{x}
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  \code{x}, \code{y} and \code{z}, with components after \code{x}
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  optionally missing (in which case the version number is older than
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  optionally missing (in which case the version number is older than
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  those with the components present).
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  those with the components present).
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}
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}
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\seealso{\code{\link{library}}, \code{\link{packageStatus}}.}
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\seealso{\code{\link{library}}, \code{\link[utils]{packageStatus}}.}
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\examples{
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\examples{
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compareVersion("1.0", "1.0-1")
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compareVersion("1.0", "1.0-1")
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compareVersion("7.2-0","7.1-12")
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compareVersion("7.2-0","7.1-12")
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}
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}
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\keyword{utilities}
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\keyword{utilities}