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Rev 88486 Rev 88606
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  \item{verbose}{a logical.  If \code{TRUE}, additional diagnostics are
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  \item{verbose}{a logical.  If \code{TRUE}, additional diagnostics are
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    printed, notably when a package is found more than once.}
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    printed, notably when a package is found more than once.}
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  \item{call}{call expression.}
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  \item{call}{call expression.}
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}
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}
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\details{
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\details{
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  \code{find.package} returns path to the locations where the
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  \code{find.package} returns the paths to the locations where the
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  given packages are found.  If \code{lib.loc} is \code{NULL}, then
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  given packages are found.  If \code{lib.loc} is \code{NULL}, then
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  loaded namespaces are searched before the libraries.  If a package is
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  loaded namespaces are searched before the libraries.  If a package is
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  found more than once, the first match is used.  Unless \code{quiet =
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  found more than once, the first match is used.  Unless \code{quiet =
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  TRUE} a warning will be given about the named packages which are not
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  TRUE} a warning will be given about the named packages which are not
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  found, and an error if none are.  If \code{verbose} is true, warnings
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  found, and an error if none are.  If \code{verbose} is true, warnings
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  available, \dots.
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  available, \dots.
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  \code{path.package} returns the paths from which the named packages
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  \code{path.package} returns the paths from which the named packages
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  were loaded, or if none were named, for all currently attached packages.
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  were loaded, or if none were named, for all currently attached packages.
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  Unless \code{quiet = TRUE} it will warn if some of the packages named
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  Unless \code{quiet = TRUE} it will warn if some of the packages named
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  are not attached, and given an error if none are.
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  are not attached, and give an error if none are.
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  \code{packageNotFoundError} creates an error condition object of class
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  \code{packageNotFoundError} creates an error condition object of class
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  \code{packageNotFoundError} for signaling errors. The condition object
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  \code{packageNotFoundError} for signaling errors. The condition object
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  contains the fields \code{package} and \code{lib.loc}.
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  contains the fields \code{package} and \code{lib.loc}.
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}
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}