I'm trying to find a way to measure the delta of two measurements in a Grafana graph. For example, I have chart one with a plotted point 1 equal to 100 and five minutes later point 2 is 75, the second chart would plot a value of -25...the delta over five minutes from chart one. Or +25 would work for my purposes just as well.
Are there instructions on how to do that?
The database is InfluxDB. Grafana version 3.02.