[rrd-users] Combining Multi-RRD Datapoints in Graph

Alex van den Bogaerdt alex at vandenbogaerdt.nl
Sat Feb 14 14:45:02 CET 2009

> That CDEF function (as well as the similar add and divide averaging in 
> CDEF notation) works great!  I gather the 'AVG' function does the exact 
> same, as I see from the graphs.  In any case, this works perfectly.

It does not. The difference is in how it handles unknown data.

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