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    \item{\option{--verbose}}{gives details of what \command{Rscript} is
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    \item{\option{--verbose}}{gives details of what \command{Rscript} is
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      doing.  Also passed on to \R.}
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      doing.  Also passed on to \R.}
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    \item{\option{--default-packages=list}}{where \code{list} is a
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    \item{\option{--default-packages=list}}{where \code{list} is a
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      comma-separated list of package names or \code{NULL}.  Sets the
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      comma-separated list of package names or \code{NULL}.  Sets the
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      environment variable \env{R_DEFAULT_PACKAGES} which determines the
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      environment variable \env{R_DEFAULT_PACKAGES} which determines the
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      packages loaded on startup.  The default for \command{Rscript}
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      packages loaded on startup.
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      omits \pkg{methods} as it takes about 60\% of the startup time.
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    }
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    }
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  }
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  }
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  Spaces are allowed in \code{expression} and \code{file} (but will need
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  Spaces are allowed in \code{expression} and \code{file} (but will need
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  to be protected from the shell in use, if any, for example by
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  to be protected from the shell in use, if any, for example by
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  enclosing the argument in quotes).
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  enclosing the argument in quotes).
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  If \option{--default-packages} is not used, then \command{Rscript}
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  checks the environment variable \env{R_SCRIPT_DEFAULT_PACKAGES}. If
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  this is set, then it takes precedence over \env{R_DEFAULT_PACKAGES}.
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#ifdef unix
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#ifdef unix
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  Normally the version of \R is determined at installation, but this can
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  Normally the version of \R is determined at installation, but this can
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  be overridden by setting the environment variable \env{RHOME}.
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  be overridden by setting the environment variable \env{RHOME}.
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#endif
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#endif
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#ifdef windows
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#ifdef windows