avoiding (another) error

Dear all,

Many thanks to all who always so quickly respond with helpful hints!

Currently I am working with R 0.63.1 on SuSE 5.2 which I installed this
morning within about half an hour: my deepest compliments to the
developpers! (I had still 0.62.2 before.)

This time I am trying the following:

xy <- list (a= c (1, 2, NA), b= c (2, 3))
list.name <- "xy"
get (list.name)$a [is.na (get (list.name)$a)] <- 0

Error: couldn't find function "get<-"

xy

$a
[1] 1 2 0

$b
[1] 2 3

So obvisouly R does what I would like it to do. How can I get it to do it
without the error? The problem is that I need to do this within a
function.

Thanks for ideas and hints! Regards,
--			~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lorenz Gygax		 LGygax at amath.unizh.ch;       room: 36-L-40
			 Department of Applied Mathematics
			 University of Zuerich-Irchel
			 Winterthurerstr. 190; CH-8057 Zurich
			 voice: 41-1-635-58-52  fax: 41-1-635-57-05
			~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


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