Is there an easier way to access attributes of a class in R, can I use dot notation?

Question

I have created an object in R that contains several attributes. How can I easily access them?

I can do:

attr(x, attributeName)

or:

Answer 1

probably there is no built-in function that is counter part of . in C++, but you can define it like this:

> `%.%` <- function(o, a) attr(o, as.character(substitute(a)))
> x <- 1
> attr(x, "orz") <- 2
> x%.%orz
[1] 2