Thank you everybody for your help. I am sure using the information you provided I'll be able to do better than my current approach of using "cat" to trace my programmes!
cheers Worik [[alternative HTML version deleted]] ______________________________________________ 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.