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  \code{\link{getwd}} for the working directory.
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  \code{\link{getwd}} for the working directory.
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  The help for \sQuote{\link{environment variables}} lists many of the
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  The help for \sQuote{\link{environment variables}} lists many of the
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  environment variables used by \R.
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  environment variables used by \R.
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}
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}
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\examples{\dontshow{## IGNORE_RDIFF_BEGIN}
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\examples{\dontdiff{
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## whether HOST is set will be shell-dependent e.g. Solaris' csh did not.
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## whether HOST is set will be shell-dependent e.g. Solaris' csh did not.
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Sys.getenv(c("R_HOME", "R_PAPERSIZE", "R_PRINTCMD", "HOST"))
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Sys.getenv(c("R_HOME", "R_PAPERSIZE", "R_PRINTCMD", "HOST"))
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s <- Sys.getenv() # *all* environment variables
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s <- Sys.getenv() # *all* environment variables
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op <- options(width=111) # (nice printing)
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op <- options(width=111) # (nice printing)
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## Language and Locale settings -- but rather use Sys.getlocale()
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## Language and Locale settings -- but rather use Sys.getlocale()
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s[grep("^L(C|ANG)", names(s))]
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s[grep("^L(C|ANG)", names(s))]
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## typically R-related:
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## typically R-related:
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s[grep("^_?R_", names(s))]
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s[grep("^_?R_", names(s))]
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options(op)# reset
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options(op)# reset
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\dontshow{## IGNORE_RDIFF_END}
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}
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}}
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\keyword{environment}
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\keyword{environment}
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\keyword{utilities}
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\keyword{utilities}