plot(data$x, data$y) # Draw Base R plot without circleAfter executing the previous syntax the scatterplot shown in Figure 1 has been plotted.Let’s assume that we want to add a circle to this plot. In this case, we can use the plotrix package....
Lemon, JimBolker, BenOom, SanderKlein, EduardoRowlingson, BarryWickham, HadleyTyagi, AnupamEterradossi, OlivierGrothendieck, GaborToews, Michael