Calculate total continuous duration when value is equal or above static threshold with resetting calculation when it goes below

[pawelzak]

I have a log that contains numerical value which is logged irregularly:

I would like to calculate (and show on timechart) total continuous duration when value is equal or above static threshold. But I'd like to reset this calculation when it goes below that threshold.

For threshold == 45 it should like this:

How can I get this? Thanks for your help.

[to4kawa · Accepted solution]

| makeresults 
| eval _raw="time,value
2020-03-31 22:00:00,40
2020-03-31 22:00:20,45
2020-03-31 22:01:03,46
2020-03-31 22:01:36,48
2020-03-31 22:02:01,52
2020-03-31 22:02:27,41
2020-03-31 22:03:11,43
2020-03-31 22:03:30,44
2020-03-31 22:04:08,48
2020-03-31 22:04:32,44
2020-03-31 22:05:01,46
2020-03-31 22:05:39,48
2020-03-31 22:06:00,52" 
| multikv forceheader=1 
| eval _time=strptime(time,"%F %T") 
| autoregress value as p_1 
| eval flag=if(value > 45 AND p_1 >= 45, 1, 0) 
| streamstats window=2 range(_time) as duration 
| streamstats reset_on_change=t sum(duration) as duration by flag 
| eval duration=if(flag=="0", "0", round(duration)) 
| table _time value duration

value are changed from original question.
flag is the key. Please modify as you like.

[pawelzak]

WOW! That was fast! Thank you!

I only corrected value>45 to value>=45 and it is almost what I wanted to get.
In you version duration is started to being calculated since the first value which crossed threshold (increasing direction). For that value I'd like to have 0 and duration should be started to being calculated for next value (of course only if that next value is still equal or above threshold).

Modified example:

Result of your search:

Is this even possible?

[to4kawa]

yes, check my answer.

[pawelzak]

This is exactly what I needed!

Thank you very much!