\Header{rug}{Add a Rug to a Plot}
\keyword{hplot}{rug}
\begin{Description}\relax
Adds a \emph{rug} representation (1-d plot) of the data to the plot.\end{Description}
\begin{Usage}
\begin{verbatim}
rug(x, ticksize=0.03, side=1, lwd=0.5, col)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{x}] A numeric vector
\item[\code{ticksize}] The length of the ticks making up the `rug'. Positive
lengths give inwards ticks.
\item[\code{side}] On which side of the plot box the rug will be
plotted. Normally 1 (bottom) or 3 (top).
\item[\code{lwd}] The line width of the ticks.
\item[\code{col}] The colour the ticks are plotted in, default is black.
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
Because of the way \code{rug} is implemented, only values of \code{x}
that fall within the plot region are included.  There will be a
warning if any finite values are omitted, but non-finite values are
omitted silently.

Because of the way colours are done the axis itself is coloured the
same as the ticks.  You can always replot the box in black if you don't
like this feature.\end{Details}
\begin{Author}\relax
B. D. Ripley\end{Author}
\begin{SeeAlso}\relax
\code{\Link{jitter}} which you may want for ties in \code{x}.\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
data(faithful)
attach(faithful)
plot(density(eruptions, bw=0.15))
rug(eruptions)
rug(jitter(eruptions, amount = .01), side = 3, col = "light blue")
detach("faithful")
\end{ExampleCode}
\end{Examples}

