circles: Add circles to plot
Description
Base R has a function for plotting circles called "symbols". Unfortunately, the size of the circles is inconsistent across devices. This function plots circles whose radius is specified in used coordinates.
Usage
circles(x, y, radius, bg = NULL, fg = "white", ...)
Value
none, used for side effect
Arguments
- x
centers (x coordinate)
- y
centers (y coordinate)
- radius
radius (in user coordinates)
- bg
background colour
- fg
foreground colour
- ...
passed to polygon, e.g. lwd