Account the number of time that something happen

[Fermin]

Hi, I dont speak english, but I wait that you can understand me. I seek a expression that it account the frequency, the number of times, that something happen, for example, the number of times that the car is in second gear, etc.

I can do this, but I need five expressions by each parameter that I want know the number of times

Example that I do:

A: 'Gear' == 2
B: time_shift('A',0.001) [Rate:1000Hz]
C: max('A' - 'B',0)
D: integrate('C') [Rate:1000Hz]
Nº of time in 2º gear: (stat_max('D') - stat_min('D')) * 1000 [Rate:1000Hz]

I seek something more simple, this way consume many resources of the PC.

Can you help me?

Thanks.

[OmarK]

i2 doesn't have a "count" function that you are looking for yet. I usually export data into excel and perform maths calculations as well as produce summary charts and graphs, maybe this could be an option.

[mangel83]

3 years after the original post I wanted to know if the function was included, i.e. to count the number of gearshifts per lap.

Is it possible?

[Martin]

this is how I count
integrate(abs(derivative('Gear')))

[ElectronSpeed]

Martin,

I like your solution.

I was having a problem trying to count RISING edges of a pulsed signal. Ultimately, I took your solution and divided by 2.

Eric Schieb