[R] getting caller's environment

[Gabor Grothendieck]

Try this:

myassign <- function(x, val, env = parent.frame())
assign(deparse(substitute(x)), val, env)
myassign(x, 3)
x # 3

On Wed, Jan 21, 2009 at 8:03 PM, Yi Zhang <yizhang84 at gmail.com> wrote:
> On Wed, Jan 21, 2009 at 5:57 PM, Gabor Grothendieck
> <ggrothendieck at gmail.com> wrote:
>> Try this:
>>
>> f <- function(env = parent.frame()) env$x
> Thanks. What if the x in "env$x" is an argument passed in? e.g. f <-
> function(x, env=parent.frame()) { #assign to 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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>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>
>
>
> --
> Yi
>