how to overlay many plot windows in a sigle frame

Hello R Users,

I want to plot many windows in a single frame.

For example, suppose I have to plot the
vertical profile of the aircraft co2
measurement in different months in a year,
and I want to plot these different months in
separate windows but the final 12 plots I
want to keep in single frame. So how I can do
this in R.

There would be any overlay command after
ploting the first winodw so I can send the
second plot window in the same frame, side by
side with the old window.

How I can do this ?

Many thanks for help,

Regards,
Yogesh

===========================================
Yogesh Tiwari,
Max-Planck Institute for Biogeochemistry,
Hans-Knoell Strasse 10,
D-07745 Jena,
Germany

Office   : 0049 3641 576 376
Home     : 0049 3641 223 163
Fax      : 0049 3641 577 300
Cell     : 0049 1520 4591 008
e-mail   : yogesh.tiwari at bgc-jena.mpg.de