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  \command{Rscript --version} gives the version of \command{Rscript}.
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  \command{Rscript --version} gives the version of \command{Rscript}.
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  Other invocations invoke the \R front-end with selected options.  This
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  Other invocations invoke the \R front-end with selected options.  This
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  front-end is convenient for writing \samp{#!} scripts since it is an
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  front-end is convenient for writing \samp{#!} scripts since it is an
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  executable and takes \code{file} directly as an argument.  Options
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  executable and takes \code{file} directly as an argument.  Options
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  \option{--slave --no-restore} are always supplied: these imply
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  \option{--no-echo --no-restore} are always supplied: these imply
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  \option{--no-save}. Arguments that contain spaces cannot be specified
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  \option{--no-save}. Arguments that contain spaces cannot be specified
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  directly on the \samp{#!} line, because spaces and tabs are interpreted as
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  directly on the \samp{#!} line, because spaces and tabs are interpreted as
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  delimiters and there is no way to protect them from this interpretation on
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  delimiters and there is no way to protect them from this interpretation on
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  the \samp{#!} line. (The standard Windows command line has no concept
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  the \samp{#!} line. (The standard Windows command line has no concept
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  of \samp{#!} scripts, but Cygwin shells do.)
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  of \samp{#!} scripts, but Cygwin shells do.)