How do you reply to a specific post on this board instead of the thread? I am too incompetent to find this out myself.
Thanks, Michael unaffiliated ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.