Dear Berend and Petr,
I do apologise for the disorderly code I posted. I have tried to solve it in a
new mail.
Frank S.
[[alternative HTML version deleted]]______________________________________________ [email protected] 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.

