[R] Creating an environment for a function.

[Thomas Lumley]

On Thu, 13 Apr 2006, Rolf Turner wrote:

> Brian Ripley wrote:
>
>> Can I also suggest local()?  This does a similar thing in a perhaps
>> more natural way.
>
> Sorry, I'm not with you.  I'm slow, and as I said, I don't
> really grok environments.
>
> Let's look at a toy example.  Suppose I want to create a function foo:
>
> 	function(x){x^n}
>
> and assign n the value of 4, say, in the environment of foo.
>
> Duncan Murdoch's solution was to create a function make.foo:
>
> 	make.foo <- function() {
> 		n <- 4
> 		foo <- function(x){x^n}
> 		foo
> 	}
>
> and then execute
>
> 	foo <- make.foo()
>
> How would I go about accompishing the same (toy) task making use of the
> local() function?
>
         foo <- local({
                       n <- 4
                       function(x) {x^n}
                     })

       -thomas


Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle