When you say you want to create seperate index , do you mean you want to create seperate coloumns essentially?
If so, you can just add an extra condition while creating these columns so that your fields are only linked with [15-49] age group.
For a separate 'Modern Method' Field , create your calculated field like this.
[Indicator] = 'Modern Method'
[Age Group] = '[15-49]'
Similarly you can make the change for rest of the 2 calculations.
Hope this helps.
Please see below and attached Tableau workbook for a solution. If this answers your question, please mark this response as correct. If helpful please mark as helpful. So that others may find it useful in the future. Thx, Don
Book1.twbx 2.0 MB
May I ask why you want to split the Indicator field? Do you want to present your results as tables or charts? There could be several other ways to resolve this if you can say what you want to achieve.
I wanted to see separately 'Modern method' 'Unmet need' and 'Demand Satisfied by modern method'. All these three indicators are now under one measure as 'Indicator'. It is not to make a table, I wanted to explore the trend of these three indicators for individual countries specifically for East and Southern Africa countries.