[mrtg] maths in mrtg

Nick price np121 at hotmail.com
Tue Oct 20 15:57:59 CEST 2015

For my incoming mains power supply I have a monitor box that gives me kVA
and kVAR values via SNMP  I need to get kW into a graph.


I need to do the following maths  kW=(kVA^2-kVAR^2)^0.5 how do I get mrtg to
do this


Many thanks in advance



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