Sally Lee Posted March 16, 2022 Share Posted March 16, 2022 Good morning, I have a cross table with encounters as the value. Year in columns, and hospitals in rows. 2016 2020 Hospital A 30 40 Hospital B 70 80 Total 100 120 I have a custom expression that calculates the market share for each year: Sum(If([Calendar_Year]="2016",[Encounters] )) THEN [Value] / Sum([Value]) OVER (All([Axis.Rows])), Sum(If([Calendar_Year]="2020",[Encounters] )) THEN [Value] / Sum([Value]) OVER (All([Axis.Rows])) Result is: 2016 2020 Hospital A 30% 33% Hospital B 70% 67% Total 100% 100% The problem is calculating the change in market share from 2016 to 2020 (hospital A result would be +3%; hospital B would be -3%; total = 0%). Any suggestions I have tried : Sum(If([Calendar_Year]="2020",[Encounters] )) THEN [Value] / Sum([Value]) OVER (All([Axis.Rows])) - Sum(If([Calendar_Year]="2016",[Encounters] )) THEN [Value] / Sum([Value]) OVER (All([Axis.Rows])) This returns an invalid expression. I would appreciate any suggestions or ideas you may have. I am a newbie to Tibco. Thank you. Link to comment Share on other sites More sharing options...
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