Base class for statistical transformations. A stat receives the evaluated
aesthetic values and returns (possibly new) values for the geom to draw.
Arguments
- name
Human-readable stat name.
- provides
Aesthetics this stat computes itself. A geom's required
aesthetics are validated against the user's mapping plus these, so
e.g. geom_point(stat = stat_bin()) is accepted even though the user
maps only x - the stat supplies y.
Value
An S7 object of class Stat, the base class for statistical transformations.