CIRCLES was inspired by the built-in function VISCIRCLES; the two main differences being that it draws circles as a patch rather than a line and offers a bit more flexibility (I think) in terms of coloring the faces/edges.
The only required inputs are vectors for the X and Y coordinates of each circle and the corresponding radii R.

>> circles(x,y,r);

See the function header for additional details and a list of optional parameters. Run the demo script if you want to view sample results fast without writing any code yourself.