[R] changing function argument

[Thomas Mang]

Hi,

I wonder if the following is possible in R:

Suppose a function takes an argument, and wants to modify this argument 
so that the change is visible _at the call side_. It would be what is 
for example known as pass-by-reference-to-non-const in C++.

test <- function(x)
{
  x <- 10
  ...
  return (somethingElse) # I do NOT want having to return x
}

number = 5
test(number)
stopifnot(number == 10)


Is there some trick with scoping rules and maybe <<- to achieve this ?

thanks,
Thomas