autolayer: Create a ggplot layer appropriate to a particular data type
Description
autolayer() uses ggplot2 to draw a particular layer for an object of a
particular class in a single command. This defines the S3 generic that
other classes and packages can extend.
Usage
autolayer(object, ...)
Value
a ggplot layer
Arguments
object
an object, whose class will determine the behaviour of autolayer