Arcade expression to calculate percentage

CMcDonald

Hello,

I would like to calculate the percentage of properties that are multiple occupancy.

There are 3 Layers required to do this

1) Multiple Occupancy (Points)

2) Addresses (Points)

3) Zones (Polygons)

I have created 2 expressions in the Zones Layer so that in the pop-up they 'count' the number of properties in both point Layers

Can I create another expression in the Zones Layer that will in effect

Multiple Occupancy Count / Address Count * 100

So that I can get a %

This is my arcade but the % returned although does not error is not the correct figure 

//count multiple occupancy properties
var hmo = FeatureSetByName($map, 'Houses in Multiple Occupation HMO')
var countHMO = Count(Intersects(hmo, $feature))
return countHMO
//count addresses
var address = FeatureSetByName($map,"CAG OldAbdn Sample")
var countAddress = Count(Intersects(address,$feature))
return countAddress
//calculate % of multiple occupancy
($feature["countHMO"]/$feature["countAddress"])*100

Thank you 🙂

 

JohannesLindner

1. You need to remove the return statements. If you return from a function, everything after the statement is not executed.
2. Arcade expressions don't know of each other. You cant call $feature["countHMO"], because that calls a field that does not exist. You have to calculate countHMO & countAddress again and use them for calculating the percentage.

//count multiple occupancy properties
var hmo = FeatureSetByName($map, 'Houses in Multiple Occupation HMO')
var countHMO = Count(Intersects(hmo, $feature))
//return countHMO
//count addresses
var address = FeatureSetByName($map,"CAG OldAbdn Sample")
var countAddress = Count(Intersects(address,$feature))
//return countAddress
//calculate % of multiple occupancy
return (countHMO/countAddress)*100