Marc, Thanks a lot -- the axTicks(), segments() and mtext() solution looks like what I was looking for.
Regards, Dirk
--
Those are my principles, and if you don't like them... well, I have others.
-- Groucho Marx
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
