panel.xyplot {lattice}R Documentation

Default Panel Function for xyplot


This is the default panel function for xyplot. Also see panel.superpose. The default panel functions for splom and qq are essentially the same function.


panel.xyplot(x, y, type = "p",
             groups = NULL,
             pch, col, col.line, col.symbol,
             font, fontfamily, fontface,
             lty, cex, fill, lwd,
             horizontal = FALSE, ...)


x,y variables to be plotted in the scatterplot
type character vector consisting of one or more of the following: "p", "l", "h", "b", "o", "s", "S", "r", "a", "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 type is similar to the effect of type in plot (type "b" is actually the same as "o"). "r" adds a regression line (same as panel.lmline, except for default graphical parameters), and "smooth" adds a lowess fit (same as panel.loess). "g" adds a reference grid using panel.grid in the background. "a" has the effect of calling panel.linejoin, which can be useful for creating interaction plots. The effect of several of these specifications depend on the value of horizontal.
See example(xyplot) and demo(lattice) for examples.
groups an optional grouping variable. If present, panel.superpose will be used instead to display each subgroup
col, col.line, col.symbol default colours are obtained from plot.symbol and plot.line using trellis.par.get.
font, fontface, fontfamily font used when pch is a character
pch, lty, cex, lwd, fill other graphical parameters. fill serves the purpose of bg in points for certain values of pch
... extra arguments, if any, for panel.xyplot. In most cases panel.xyplot ignores these. For types "r" and "smooth", these are passed on to panel.lmline and panel.loess respectively.
horizontal logical. Controls orientation for certain type's, e.g. one of "h", "s" or "S"



Creates scatterplot of x and y, with various modifications possible via the type argument. panel.qq draws a 45 degree line before calling panel.xyplot.

Note that most of the arguments controlling the display can be supplied directly to the high-level (e.g. xyplot) call.


Deepayan Sarkar

See Also

panel.superpose, xyplot, splom

[Package lattice version 0.15-4 Index]