You can use 'local'
> counter()
> # create a function with a 'local static' variable
> counter <- local({
+ i <- 0
+ function() {
+ i <<- i + 1
+ i
+ }
+ })
>
> counter()
[1] 1
> counter()
[1] 2
> i <- 42 # change 'i' at this level
> counter() # has not effect on the 'counter' i which is local
[1] 3
>
On Thu, Apr 16, 2009 at 8:46 AM, ivo welch <ivo...@gmail.com> wrote:
> dear R experts:
>
> does R have "static" variables that are local to functions? I know
> that they are usually better avoided (although they are better than
> globals).
>
> However, I would like to have a function print how often it was
> invoked when it is invoked, or at least print its name only once to
> STDOUT when it is invoked many times.
>
> possible without <<- ?
>
> sincerely,
>
> /iaw
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
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