[R] getting caller's environment

[Gabor Grothendieck]

Try this:

f <- function(env = parent.frame()) env$x
g <- function(x=1) f()
x <- 2
g() # 1

On Wed, Jan 21, 2009 at 5:45 PM, Yi Zhang <yizhang84 at gmail.com> wrote:
> Hello,
>
> I'm writing a function like this:
>
> f<-function(x,y,...) {
> ...
> assign(x,y,envir=?)
> }
>
> I need the caller (of f) 's environment for the "?" so that the
> assignment is done at the right place. To be specific, when the code
> "f(x,1)" appears in environment A, I need the assignment of 1 to x
> happen in environment A. So my question is how to get the correct
> environment?
>
> Thanks for any suggestions!
>
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