custom.draw.circle: Draws a circle
Description
Given a center, radius and color, this function draws a circle.
Usage
custom.draw.circle(x, y, r, col)
Value
This function does not return a value, it just draws a circle.
Arguments
- x
X coordinate of the center
- y
Y coordinate of the center
- r
Radius of the circle
- col
Color of the circle
References
http://www.r-bloggers.com/circle-packing-with-r/