[R] Retrieving objects from functions...

[Uwe Ligges]

Kevin Wang wrote:

> Hi,
> 
> On Thu, 30 Sep 2004, Jonathan Harris wrote:
> 
> 
>>I've written a program that involves a loop that creates a matrix. I'd
>>like to be able to manipulate that matrix on my R desktop, but after I
>>run the function, that matrix does not appear when I type ls(). How can
>>I make that matrix become an object that I can manipulate?
> 
> 
> If I understand you right, you want something like:
>   foo <- function() {
>      goo <- matrix(1:10, nrow = 5, ncol = 2)
>   }
> then be able to call goo after running foo()?  If this is what you want,
> then you need to do something like:
>   foo <- function() {
>      goo <<- matrix(1:10, nrow = 5, ncol = 2)

No, you don't want to do it that way, but you want to return(), in 
almost all cases I can imagine ...

Uwe


>   }
> to force goo to become a global variable, instead of a local variable to
> foo().
> 
> HTH,
> 
> Kevin
> 
> --------------------------------
> Ko-Kang Kevin Wang
> PhD Student
> Centre for Mathematics and its Applications
> Building 27, Room 1004
> Mathematical Sciences Institute (MSI)
> Australian National University
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> 
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