Hi
On 7 Jun 2004 at 12:57, zze-PELAY Nicolas FTRD/DMR/BE
wrote:
> Hello,
>
> I'd like to know if I can modify a constant value with a function.
>
> Example :
>
> a=4
>
> f1<-function()
> {a=3}
Simply use <<- in the function. But I am not sure if this is
recommendable way of items manipulating in R.
> f1<-function() a<<-3
> f1()
> a<-4
> a
[1] 4
> f1()
> a
[1] 3
Cheers
Petr
BTW using informative subject is preferable to plain "question"
statement. :-)
>
> Of course, after the function f1() is executed , the value of a is
> always 4. I'd like the value returned is 3, like it is possible in C
> by doing *a=3
>
>
> Thank you
>
> nicolas
>
> [[alternative HTML version deleted]]
>
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Petr Pikal
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