scale_size_area: Scale area instead of radius, for size.
Description
When scale_size_area is used, the default behavior is to scale the
area of points to be proportional to the value.Usage
scale_size_area(..., max_size = 6)
Arguments
...
Other arguments passed on to continuous_scale
to control name, limits, breaks, labels and so forth. max_size
Size of largest points.
Details
Note that this controls the size scale, so it will also control
the thickness of lines. Line thickness will be proportional to the square
root of the value, which is probably undesirable in most cases.