Thank you David, it is a good resouce to find related subjects. I need time to understand the topics.
Thank you again Bjørn-Helge for your response.
Euna
[[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.
