[R] Odp: Aggregation and the meaning of class

[Karl Ove Hufthammer]

Chip Barnaby:

> My question is: How does one learn the specifics?  For the case at
> hand, what are the specialized methods associated with class "by"?

The methods for the (S3) generic function 'by':

$ methods(by)
[1] by.data.frame by.default

Functions for objects of class 'by':

$ methods(class="by")
[1] print.by

Note that both of these may be extended by loading additional packages.

-- 
Karl Ove Hufthammer