>    I try to add three different lines (solid, short dash, long dash)
>    in to current barplot.

Have a look at the lty parameter. It's documented in ?par. If I
understand your question correctly, you may also be interested in
segments() to actually draw the lines (or maybe abline()).

cu
        Philipp

-- 
Dr. Philipp Pagel                              Tel.  +49-8161-71 2131
Lehrstuhl für Genomorientierte Bioinformatik   Fax.  +49-8161-71 2186
Technische Universität München
Wissenschaftszentrum Weihenstephan
85350 Freising, Germany
 
 and
 
Institut für Bioinformatik und Systembiologie / MIPS
Helmholtz Zentrum München -
Deutsches Forschungszentrum für Gesundheit und Umwelt
Ingolstädter Landstrasse 1
85764 Neuherberg, Germany
http://mips.gsf.de/staff/pagel

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