L<rrdgraph_rpn> describes the B<RPN> language used in the B<xDEF> statements.
L<rrdgraph_graph> page describes all the graph and print functions.
-Make sure to read L<rrdgraph_examples> for tipsE<amp>tricks.
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=head1 AUTHOR
Program by Tobias Oetiker E<lt>tobi@oetiker.chE<gt>