Re: [Rd] how to start local scope?

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Thu 27 Jul 2006 - 12:34:10 GMT

On 7/27/2006 8:16 AM, Tamas K Papp wrote:
> How can I start a local scope inside an R function? Eg in
>

>> b

> Error: object "b" not found
>> f <- function() {

> + {
> + b <- 1
> + }
> + b+2
> + }
>> f()

> [1] 3
>
> I would like f() to report an error, not finding b. I am thinking
> about something like let in Scheme/Lisp.

The local() function does this:

 > f <- function() {

+   local({ b <- 1 })
+   b + 2
+ }

 > f()
Error in f() : object "b" not found

R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu Jul 27 23:48:52 2006

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