Class "positioned", extends "ordered" to specify the position for graphing the levels of a factor.
The default values for plotting a factor
x are the integers
1:length(levels(x)). This class and its functions provide a way of
specifying alternate plotting locations for the levels.
Objects from the Class
A virtual Class: No objects may be created from it.
"factor", by class "ordered", distance 2.
"oldClass", by class "ordered", distance 3.
No methods defined with class "positioned" in the signature.
S3-type methods are
interaction.positioned should be a method, it isn't
interaction is not a generic and can't easily be made one
since the name
Heiberger, Richard M. and Holland, Burt (2015). Statistical Analysis and Data Display: An Intermediate Course with Examples in R. Second Edition. Springer-Verlag, New York. https://www.springer.com/us/book/9781493921218