I am trying to use the Relationship visualization with two numeric attributes; however, one of the variables is negative and therefore, I'd like to use an Arcade expression to look at the absolute value instead. I wrote a simple Arcade expression to return the absolute value. To my chagrin, I found that smart mapping doesn't recognize the transformed variable as numeric and therefore won't allow me use it the relationship. Is this by design or is this a bug?
Does anyone have any ideas on how to achieve this without having to add a field?
You can see/test the issue in this example map from the documentation where global species rarity are displayed in relation to species richness. If I attempt to transform one of the variables by multiplying it by -1, I get a result but it's not interpreted as numeric and therefore the Relationship visualization is not available.
Species Rarity and Richness example map
NegativeRarityAll_TEST expression: return Number(-1* $feature.Rar_all);
