[R] a question about scoping functions

[Liaw, Andy]

Here's one possible alternative:

-  Write the helper functions outside of func().
-  source() the file containing all the functions.
-  save(helper1, helper2, file="helperfuns.rda")
-  rm(helper1, helper2)
-  attach("helperfuns.rda")

Eventually you may want to put things into a package...

HTH,
Andy

> From: Rajarshi Guha
> 
> Hi,
>  I've written some helper functions which are used by another function
> (called func()). When func() is sourced I dont want the 
> helper function
> to be seen in the global namespace (as shown by ls()).
> 
> Currently what I have done is:
> 
> func <- function() {
>   helper1 <- function() {
>     ...
>   }
>   helper2 <- function() {
>     ...
>   }
>   # some code
> }
> 
> Is there anyway to take the functions helper1 and helper2 outside func
> (but in the same file) yet keep them from showing up in the global
> namespace when the source file for func() is loaded?
> 
> A related question is: say I move helper1 and helper2 to a file called
> helper.R
> 
> When I want to use the helper functions inside func() I can do
> source('helper.R') - but that would place them in the global 
> namespace.
> Is it possible to source some file within a func() such that 
> the sourced
> functions will be local to func()?
> 
> Thanks,
> -------------------------------------------------------------------
> Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
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