This function draws a circle using the polygon function from the graphics package. It is
an auxiliary function used by radviz2d.
Usage
circledraw (numpts = 200, radius = 1)
Arguments
numpts
Number of edges of the polygon, default is 200.
radius
Radius of the circle to be drawn, default is 1.
Value
Displays a circle of radius = radius.
Details
A circle of a specified radius is drawn by the polygon function of the graphics library
by constructing a polygon with numpts number of edges. It is intended to be an auxiliary
function for the radviz2d visualization.