GrouBy Data Expression

[JanelleShank]

Good Afternoon, All!

I have a dataset of voting results and I can trying to create a data expression that returns the MAX value of registered voters within each district and then add the total of each MAX value to find the total number of those registered. I have written a data expression using the GoupBy function, however, it is returning a null value. I have provided examples of my data expression and data below. 

var fs = FeaturesetByPortalItem(Portal("https://bedfordplanning.maps.arcgis.com"), "78eb292ce436450b85dc249bd3069741", 0, ["Precinct_name", "Reg_voters"], false)

var out_dict = {

  fields: [

    {name: "Precinct_Name", type: "esriFieldTypeString"},

    {name: "Reg_voters", type: "esriFieldTypeString"}

  ],

  features: [],

  geometryType: ""

}

var maxvotes = GroupBy("out_dict", 'Precinct_Name', {name: 'Reg_voters', expression: 'Reg_Voters', statistic: "MAX"})

Thank you,

Janelle

[jcarlson]

GroupBy returns a FeatureSet, so return maxvotes should do it. What does your expression look like at this point?

[JanelleShank]

Thank you for your help. My expression is the same as above. Turns out it was not working correctly because I had the ID number wrong for my data.

Best,

Janelle