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Detecting Increasing Values Using Analytics

Question asked by Steve Boyko Champion on Jan 7, 2016
Latest reply on Feb 23, 2016 by cvillanua

Is there a simple way to detect if a value is increasing over a period using PI Analytics?

 

The obvious thing to do is something like

if TagVal('tag', '*-5m')<'tag' then increasing else not-increasing

 

However that is not going to detect any ups or downs in the 5 minute period.

 

One could also do:

if TagMin('tag', '*-5m', '*') > TagVal('tag', '*-5m', '*') then it-increased else it-didn't-increase

 

but that doesn't detect a trend of increasing values either.

 

If the tag updates regularly then you could compare PrevEvents().

 

Any suggestions, squareheads?

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