[rrd-users] problems summing many sources together

Georges Toth georges at norm.lu
Wed Jun 7 17:26:08 MEST 2006

Hi all,

I need to sum 21 sources.
What's the best way to do that ?

I tried it like this:

Which "looks" fine if all the soruces contain data.
But if some sources don't contain data, I just get NAN.

I also tried this:

Which doesn't work neither.
I'm not sure if that is the correct way to do it....

Could somebody please help me ? :-)


Georges Toth

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