ggproto

ggproto_parent

Class name to assign to the object. This is stored as the class
attribute of the object. If <code>NULL</code> (the default), no class name will
be added to the object.

_class

ggproto object to inherit from. If <code>NULL</code>, don't inherit
from any object.

_inherit

Access parent class <code>parent</code> of object <code>self</code>.

parent, self


ggproto is inspired by the proto package, but it has some important
differences. Notably, it cleanly supports cross-package inheritance, and has
faster performance.


An implementation of the grammar of graphics in R. It combines the
advantages of both base and lattice graphics: conditioning and shared axes
are handled automatically, and you can still build up a plot step by step
from multiple data sources. It also implements a sophisticated
multidimensional conditioning system and a consistent interface to map
data to aesthetic attributes. See http://ggplot2.org for more information,
documentation and examples.

Hadley Wickham

ggplot2

An Implementation of the Grammar of Graphics

ggproto function

 ggproto methods can take an optional <code>self</code> argument: if it is present,
it is a regular method; if it's absent, it's a "static" method (i.e. it
doesn't use any fields). Imagine you have a ggproto object <code>Adder</code>, which has a
method <code>addx = function(self, n) n + self$x</code>. Then, to call this
function, you would use <code>Adder$addx(10)</code> -- the <code>self</code> is passed
in automatically by the wrapper function. <code>self</code> be located anywhere
in the function signature, although customarily it comes first.

Calling ggproto methods

 To explicitly call a methods in a parent, use
<code>ggproto_parent(Parent, self)</code>.

ggproto: Create a new ggproto object

Description

Usage

Arguments

Calling ggproto methods

Calling methods in a parent