panel.xyplot(x, y, type = "p", ...)
panel.qq(x, y, type = "p", ...)
panel.qqmath(x, y, type = "p", ...)
panel.splom(x, y, type = "p", ...)

x:

horizontal coordinates of points to be plotted.

y:

vertical coordinates of points to be plotted.

type:

character string telling how to plot the x and y values: "p" for plotting points, "l" for lines, "b" for both points and lines.

...:

graphical parameters that are passed to points or lines. By default, the trellis parameter list plot.symbol will be used to control character size (cex), plotting symbol (pch), font, and color (col) for points; the plot.line parameters will be used to control line width (lwd), line type (lty), and color (col) for lines. panel.qq also plots a x=y line.