Dear Karl, thanks for your answer.
I am still wondering why the point "i~i" is plotted at "i" but not the vertical line? And how I can plot the vertical line at "i". Do you know a solution? Cheers, Marius ______________________________________________ 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.
