[R] Retrieving objects from functions...

[Kevin Wang]

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)
  }
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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Australia

Homepage: http://wwwmaths.anu.edu.au/~wangk/
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