[rrd-users] Struggling with rrdtool graph function.

Randy rrdtool at anr.net
Tue Mar 26 16:30:17 CET 2013

Quoting Simon Hobson <linux at thehobsons.co.uk>:

> There's no direct way. The only way I can think of would be to  
> create a CDEF that sets the data to 0 (or unknown) outside of the  
> times you are interested in - and then total that.

That's certainly along the lines of what I was thinking, but that's  
what I can't get my head around. Can you give me an example CDEF that  
would do that?

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