On Wed, Feb 25, 2009 at 8:41 AM, Wacek Kusnierczyk <waclaw.marcin.kusnierc...@idi.ntnu.no> wrote: > hadley wickham wrote: >> And for completeness here's a function that returns the next integer >> on each call. >> >> n <- (function(){ >> i <- 0 >> function() { >> i <<- i + 1 >> i >> } >> })() >> > > actually, you do not need the external function to have the functionality: > > n = local({ > i = 0 > function() (i <<- i + 1)[1] }) > > n() > # 1 > n() > # 2
Yes, I'm just using the function as a way of creating an environment. The function method is a little more flexible if you want multiple independent counters though. Hadley -- http://had.co.nz/ ______________________________________________ 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.