[R] help with oop in R - class structure and syntex

[Barry Rowlingson]

Duncan Murdoch wrote:

> Another problem is that there are two different class systems in R: 
> sometimes calls S3 and S4 (because of the versions of S where they were 
> introduced).  You were reading about S3.

  There's three different class systems if you also include the R.oo 
add-on package[1]. Even perl, the language seemingly founded on the 
concept of  TMTOWTDI[2], only has the one OOP system.

Barry

[1] http://www1.maths.lth.se/help/R/R.oo/
[2] There's More Than One Way To Do It