[rrd-users] Plotting a derivative of gauge data

Aleksandr Pasechnik aleksandr.pasechnik at gmail.com
Tue Jun 14 14:38:50 CEST 2011


I have some temperature data stored and I would like to plot the derivative to observe the rate of change. I can't seem to find anything along the lines of a derivative function in the rpn documentation. Can it be done? How might one go about calculating the derivative? I suppose a simple diff would work, if I took the stack, and subtracted a stack shifted by one it would give me what I need, but I was hoping for a built in function of some sort.


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