Two functions with the same name in R [duplicate]

Question

Possible Duplicate:
Masked functions in R
R: Masked Functions
function naming conflicts

If I have two packages: A and B. Say there is function named funfun in A and there is function named funfun in B too. When I load A and B, how do I use the first funfun?

require(A)
require(B)

If I want to use funfun in A, how do I write this?

Answer 1

You can explictily refer to a package and function combination like this:

A::funfun
B::funfun

---

In unusual circumstances, you may have to refer to functions that are not exported in the namespace, in which case you need to use:

A:::funfun
B:::funfun

(But this would be unusual, and since non-exported functions do not form part of the package API, these functions could change without warning in subsequent releases of a package.)