I'd like to insert always after 3 bars a small mark, so the groups of three can be distinguished easier.
Thanks for your help! David -- ______________________________________________ R-help@stat.math.ethz.ch 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.
