[rrd-users] A reason there isn't a CF SUM function?

[Tobias Oetiker]

Yesterday Derek Haynes wrote:

> > What might be more useful might be an option to handle unknowns
> > differently during consolidation.
>
> Yeah - that's the problem. Once an unknown is recorded, I don't
> believe this formula works. Related - ADDNAN treats unknowns as zero
> (looking for the same behavior here).
>
you can always 'convert' the unknowns to zero first using an
appropriate CDEF

cheers
tobi
-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900