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added notes about VDEF expressions not being general purpose
[rrdtool.git]
/
doc
/
rrdgraph_data.pod
diff --git
a/doc/rrdgraph_data.pod
b/doc/rrdgraph_data.pod
index
c3891d4
..
04d9761
100644
(file)
--- a/
doc/rrdgraph_data.pod
+++ b/
doc/rrdgraph_data.pod
@@
-71,6
+71,9
@@
elements.
Example: C<VDEF:avg=mydata,AVERAGE>
+Note that currently only agregation functions work in VDEF rpn expressions.
+Patches to change this are welcome.
+
=head1 CDEF
B<CDEF>:I<vname>=I<RPN expression>