[R] How to plot two variables in one histogram?

[LIQING ZHANG]

Dear R members,

Is there a way I can include more than one variable in a histogram? Many
thanks in advance,

Liqing,

Liqing Zhang
Department of Ecology & Evolutionary Biology
321 Steinhaus Hall
U.C. Irvine
Irvine, CA 92697-2525
Phone:(949)-824-7703
Fax:  (949)-824-2181
Email: lzhang at uci.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._