Function Within Set Analysis

[ckiesling]

I am trying to get the value that is equal to the initial date minus the end date. How can you use subtraction within your set analysis? 

Sum({<[VitalSignset.Observation Unit Code]={'WE'}>}{1<[VitalSignset.Observation Value]=([VitalSignset.Create Date]-[VitalSignset.Observed Date]))

[Gabbar · Accepted solution]

If you want to subract 1 measure from another,  Use: Measure_1 - Measure_2.

If you want to remove second set expression data from first and then use in measure 
then try 

only({<1st_set_expression,Field_name_2=e({<Second Set expression>})>}Field_name)

You can also use two dimension to calculae like

Only({<Set_expression>}Field_1 - Field_2)