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Arcade Issue Using Average or Mean in an Attribute Rule

Question asked by Michael.Brown31@jacobs.com_Jacobs on Dec 3, 2019



I'm having trouble using the Average and Mean function in an attribute rule.  I am intersecting points with a polygon being inserted/updated and wish to get the average of a field value from all intersecting points.  I am able to use the Sum and Count functions just find and my current workaround is to use both to get the Average. 


When I use Average or Mean, I first got an error about how the field name was used to run the function.  I was able to fix that by calling it differently (you can see the difference in the expression below).


The error I am getting now is below.


My Arcade expression:


var cpm_field = "Counts_Per_Minute"
var fsGS = FeatureSetbyName($datastore, "sde.blah.Gamma_Survey",[cpm_field],true)
var fsGSIntersect = Intersects(fsGS ,$feature)
var result_avg = null
if (Count(fsGSIntersect) == 0)
   return result_avg ;
   //result_avg =  Sum(fsGSIntersect,cpm_field)/Count(fsGSIntersect) My workaround
   //result_avg =  Mean(fsGSIntersect,cpm_field) Does not work
   result_avg =  Mean(fsGSIntersect,fsGSIntersect[cpm_field])
return result_avg ;