I'm trying to get the time difference between the first and the last item
within a window of 10 minutes using kapacitor. E.g.
var vids = stream
|from()
.measurement('control')
.groupBy('vid')
|window()
.period(10m)
.every(1m)
var mins = vids
|min('ping')
.as('minping')
var first = vids
|first('ping')
var last = vids
|last('ping')
It seems that first and last indeed contain the value of 'ping' of the
first resp. last time point in the window.
My question is: is it possible to get the time difference between these two
points.
(too) simply said: last.time - first.time
thanks
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