1. The points() function
points(x, y = NULL, type = "p", …)
2. The lines() function
lines(x, y = NULL, type = "l", …)
3. The rect() function
rect(xleft, ybottom, xright, ytop, density = NULL, angle = 45, col = NA, border = NULL, lty = par("lty"), lwd = par("lwd"), …)
4. The symbols() function
symbols(x, y = NULL, circles, squares, rectangles, stars, thermometers, boxplots, inches = TRUE, add = FALSE, fg = par("col"), bg = NA, xlab = NULL, ylab = NULL, main = NULL, xlim = NULL, ylim = NULL, ...)
5. The "shape" package
--Functions for plotting graphical shapes such as ellipses, circles, cylinders, arrows, ...