[R] plotting values "by"

[Jeff D. Hamann]

I would like to produce a set of values, on the same chart, from an sql
table that is structured like...

species dbh ht expf
DF 1.2 8.9 10.0
DF 2.4 17.3 12.4342
DF 3.1 20.9 56.76
PP 2.3 16.9 100.0
PP 12.8 97.3 40.3
PP 8.2 63.0 98.34
.
.
.
SS blah, blah, blah...

is it possible to, using a single command in the plot command to plot the
different groups on the same plot or will I have to iterate through the data
set (sql select) and use the points() to get this done? Is it possible to do
the same to produce histograms...

Thanks,
Jeff.


Jeff D. Hamann
Hamann, Donald and Associates
PO Box 1421
Corvallis, Oregon USA 97339-1421
Bus. 541-753-7333
Cell. 541-740-5988
jeff_hamann at hamanndonald.com
www.hamanndonald.com


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