Set analysis within a class function

[#1]

Hi guys, Please find attached. Essentially I like to create a range with %Variance expression using the CLASS function  but it returns null. Please help!!

[sunny_talwar]

AFAIK, you cannot use Column() function in your dimension. It is only available within expressions.

[#3]

Alright then so does it mean i can't do my requirement in any other way?