\HeaderA{panel.xyplot}{Default Panel Function for xyplot}{panel.xyplot}
\aliasA{panel.qq}{panel.xyplot}{panel.qq}
\aliasA{panel.qqmath}{panel.xyplot}{panel.qqmath}
\aliasA{panel.splom}{panel.xyplot}{panel.splom}
\keyword{dplot}{panel.xyplot}
\begin{Description}\relax
This is the default panel function for \code{xyplot}. Also see
\code{panel.superpose}. The default panel functions for
\code{splom} and \code{qqmath} are essentially the same function.
\end{Description}
\begin{Usage}
\begin{verbatim}
panel.xyplot(x, y, type="p",
             pch = plot.symbol$pch,
             col,
             col.line = plot.line$col,
             col.symbol = plot.symbol$col,
             font = plot.symbol$font,
             fontfamily = plot.symbol$fontfamily,
             fontface = plot.symbol$fontface,
             lty = plot.line$lty,
             cex = plot.symbol$cex,
             lwd = plot.line$lwd,
             horizontal = FALSE, ...)
panel.splom(...)
panel.qqmath(...)
panel.qq(...)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{x,y}] variables to be plotted in the scatterplot
\item[\code{type}] character vector consisting of one or more of the
following: \code{"p", "l", "h", "b", "o", "s", "S", "r", "g",
      "smooth"}. If type has more than one element, an attempt is made
to combine the effect of each of the components.

The behaviour if any of the first six are included in \code{type} is
similar to the effect of \code{type} in \code{\LinkA{plot}{plot}} (type 'b'
is actually the same as 'o').  \code{"r"} adds a regression line
(same as \code{\LinkA{panel.lmline}{panel.lmline}}, except for default graphical
parameters), and \code{"smooth"} adds a lowess fit (same as
\code{\LinkA{panel.loess}{panel.loess}}). \code{"g"} adds a reference grid using
\code{\LinkA{panel.grid}{panel.grid}} in the background.

See \code{example(xyplot)} and \code{demo(lattice)} for examples.

\item[\code{col, col.line, col.symbol}] default colours are obtained from \code{plot.symbol} and
\code{plot.line} using \code{\LinkA{trellis.par.get}{trellis.par.get}}.

\item[\code{font, fontface, fontfamily}] font used when \code{pch} is a character

\item[\code{pch, lty, cex, lwd}] other graphical parameters.

\item[\code{...}] extra arguments, if any, for \code{panel.xyplot}. In
most cases \code{panel.xyplot} ignores these. For types "r" and
"smooth", these are passed on to \code{panel.lmline} and
\code{panel.loess} respectively.

\item[\code{horizontal}] logical. Controls orientation when \code{type} is
one of \code{"h"}, \code{"s"} or \code{"S"}
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
Creates scatterplot of \code{x} and \code{y}, with various
modifications possible via the type argument. \code{panel.qq} draws a
45 degree line before calling \code{panel.xyplot}.

Note that most of the arguments controlling the display can be
supplied directly to the high-level \code{xyplot} call.
\end{Details}
\begin{Author}\relax
Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}
\end{Author}
\begin{SeeAlso}\relax
\code{\LinkA{panel.superpose}{panel.superpose}},
\code{\LinkA{xyplot}{xyplot}},
\code{\LinkA{splom}{splom}},\code{\LinkA{qqmath}{qqmath}}
\end{SeeAlso}

