[R] write data from function into external table

[Sebastian Leuzinger]

Dear list,
My apologies if a solution / explanation to this already exists on the list, 
but it is difficult to assign it to a certain keyword.

test<-c(1:3)
testfct <- function(x) {test[1]<-100}
 test
[1] 1 2 3
 testfct(1)
[1] 1 2 3

Basically, I would like to write data into an external table that the function 
does not know. Why is this not working / what alternatives exist?

Thanks, Sebastian 

------------------------------------------------
Sebastian Leuzinger
University of Basel, Department of Environmental Science
Institute of Botany
Schönbeinstr. 6 CH-4056 Basel
ph    0041 (0) 61 2673511
fax   0041 (0) 61 2673504
email Sebastian.Leuzinger at unibas.ch 
web   http://pages.unibas.ch/botschoen/leuzinger