Thanks to Dan Wang, Petr Pikal, Arun, Jim Holtman and Arun for all of your solutions.
All the best, KW -- ______________________________________________ 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.
