Hi, I just responded this post, then have just realised it was already responded to last month with a similar answer.
I'm very sorry, I just started reading this mailing list a few days ago. Should be more aware of the discussion in future. -- Charlotte Maia http://sites.google.com/site/maiagx/home ______________________________________________ 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.
