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    \code{\link{options}(keep.source = *)} for more details.}
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    \code{\link{options}(keep.source = *)} for more details.}
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}
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}
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\details{
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\details{
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  For large files, \code{keep.source = FALSE} may save quite a bit of
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  For large files, \code{keep.source = FALSE} may save quite a bit of
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  memory.
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  memory.
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%%FIXME:  the following paragraph should be somewhere it's likely to be seen
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  In order for the code being evaluated to use the correct environment
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  (for example, in global assignments), source code in packages should
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  call
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  \code{\link{topenv}}(), which will return the namespace, if any, the
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  environment set up by \code{sys.source}, or the global environment
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  if a saved image is being used.
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}
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}
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\seealso{\code{\link{source}}, and \code{\link{library}} which uses
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\seealso{\code{\link{source}}, and \code{\link{library}} which uses
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  \code{sys.source}.
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  \code{sys.source}.
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}
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}
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\keyword{file}
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\keyword{file}