Thanks Uwe, Dennis. However, I'm unable to make progress...this is what I get:
> data(ToothGrow) Warning message: In data(ToothGrow) : data set 'ToothGrow' not found > ToothGrow Error: object 'ToothGrow' not found TIA s.b. -- View this message in context: http://r.789695.n4.nabble.com/Missing-datasets-2-13-1-tp3743896p3744123.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.