SWITCH with SAMEPERIODLASTYEAR does not work well

[IliaS]

I am writing a DAX like this

VAR sv = SELECTEDVALUE(‘select type’[type])

VAR test = SWITCH(sv, “Off”, SUM(prod[abs_off]), “On”, SUM(prod[abs_onl]))

VAR previos_val = CALCULATE (

      test,

    SAMEPERIODLASTYEAR(‘Date’[Date]) )

RETURN DIVIDE (test, previos_val) * 100

in the result it always returns 100, although if I insert a value from switch results into calculate(), all works well. How to fix this issue?

[Greg_Deckler · Accepted solution]

@IliaS Variables (VAR) are not dynamic or well, variable. Confusing yes. Variables are static once calculated so you can't recalculate them using CALCULATE. If you separate into 2 measures then yes. Also, I recommend avoiding TI functions. You may find this helpful - https://community.powerbi.com/t5/Community-Blog/To-bleep-With-Time-Intelligence/ba-p/1260000

Also, see if my Time Intelligence the Hard Way provides a different way of accomplishing what you are going for.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Time-Intelligence-quot-The-Hard-Way-quot-TIT...