\Header{rank}{Sample Ranks}
\keyword{univar}{rank}
\begin{Description}\relax
\code{rank} returns the sample ranks of the values in \code{x}.
Ties result in ranks being averaged.
\code{\Link{NA}} values are not allowed in this function.\end{Description}
\begin{Usage}
\begin{verbatim}
rank(x)
\end{verbatim}
\end{Usage}
\begin{SeeAlso}\relax
\code{\Link{order}} and \code{\Link{sort}}.\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
(r1 <- rank(x1 <- c(3,1,4,59,26)))
(r2 <- rank(x2 <- c(3,1,4,5,9,2,6,5,3,5))) # ties

## rank() is "idempotent": rank(rank(x)) == rank(x) :
stopifnot(rank(r1) == r1, rank(r2) == r2)
\end{ExampleCode}
\end{Examples}

