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\details{
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\details{
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  The following unary and binary operators are defined.  They are listed
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  The following unary and binary operators are defined.  They are listed
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  in precedence groups, from highest to lowest.
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  in precedence groups, from highest to lowest.
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  \tabular{ll}{
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  \tabular{ll}{
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    \code{[ [[}\tab indexing\cr
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    \code{[ [[}\tab indexing\cr
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    \code{::}\tab name space/variable name separator\cr
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    \code{:: :::}\tab access variables in a name space\cr
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    \code{$ @}\tab component / slot extraction\cr
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    \code{$ @}\tab component / slot extraction\cr
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    \code{^}\tab exponentiation (right to left)\cr
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    \code{^}\tab exponentiation (right to left)\cr
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    \code{- +}\tab unary minus and plus\cr
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    \code{- +}\tab unary minus and plus\cr
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    \code{:}\tab sequence operator\cr
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    \code{:}\tab sequence operator\cr
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    \code{\%any\%}\tab special operators\cr
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    \code{\%any\%}\tab special operators\cr
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  The links in the \bold{See Also} section covers most other aspects of
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  The links in the \bold{See Also} section covers most other aspects of
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  the basic syntax.
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  the basic syntax.
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}
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}
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\note{
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\note{
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  There are substantial precedence differences between \R and S.  In
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  There are substantial precedence differences between \R and S.  In
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  particular, in S \code{?} has the same precedence as \code{+ -} and
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  particular, in S \code{?} has the same precedence as (binary) \code{+ -}
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  \code{& && | ||} have equal precedence.
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  and \code{& && | ||} have equal precedence.
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}
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}
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\references{
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\references{
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  Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
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  Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
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  \emph{The New S Language}.
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  \emph{The New S Language}.
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  Wadsworth \& Brooks/Cole.
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  Wadsworth \& Brooks/Cole.