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

[Liqing Zhang]

Dear R members,

I have a question on hist() function.  Is there a way that I can present
more than one variables in one histogram?  Many thanks in advance,

Liqing


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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
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