Rounding in capsule properties

[Tayyab]

When using capsule properties to do calculated values, the outputs of the signals have a lot of decimal places. I'm looking to trim that down to just 2. Example code:

 

($signal > $mop)
.removeLongerThan(1d)
.setProperty("MOP Percent",$mp,maxValue())

Where, $mp is $p/$l*100 (pressure signal/limit signal)

I've tried adding .round(2) to the $signal, to the output of ($signal > $mop) and to $mp within the .setProperty() and all of them have the same issue of the .round() function converting the signal to a step function first, then applying the rounding criteria. This causes problems because I want the interpolated value between two raw data points. Resampling the data to a more frequent amount is not desired for risk of losing short (<2s) spikes that need to be caught. Resampling every second would be a lot of data points to calculate when doing historical analysis.

Example condition, desired value is these to 2 decimal places. Samples are hours apart.

Using .round() I get

 

 

What's the best way to achieve this outcome?

[John Brezovec]

One way of achieving this would be to compute the aggregate value (maxValue in your case) outside the call to setProperty() and then round the result before you use setProperty:

// condition you want the aggregate of
$condition = ($t > 100).removeLongerThan(1d)

// output the maxValue as a signal that we can then round easily
$maxPerCapsule = $t.aggregate(maxValue(), $condition, startKey())
                   .round(2) // round to two decimal places

// use the rounded maxValue to set the property in the condition
$condition.setProperty('Max Value', $maxPerCapsule, startValue())

This results in the aggregates getting computed with the original data and then rounded: