[R] environment and scoping

[hadley wickham]

What's wrong with explicitly passing the variables as arguments to the function?

aux.fun.one <- function(dat, x){
  median(dat) - x
}

Hadley

On Sat, Oct 4, 2008 at 11:50 AM, René Holst <rho at aqua.dtu.dk> wrote:
> I haven't quite figured out how I can change the environment of a function.
> I have a main function and want to use different auxillary functions, which I supply as parameter (or names). What I want to do is something like this:
>
> main.fun=function(aux.fun,dat){
>  x <- 1
>  fun.dat()
> }
>
> aux.fun.one=function(){
>  mean(dat)+x
> }
>
> aux.fun.one=function(){
>  median(dat)-x
> }
>
> I don't want to transfer the dat variable as a parameter as it can get pretty large. The enclosing environment of both auxillary functions is the Global environ, so they cannot see neither dat nor x as they exist inside the scope of the main function. So how do I do this?
>
> Thanks,
>
> René
>
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>
>
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