Hello Ulrik Gregersen,
Could you post a simple Tableau Workbook (.twbx) with some sample data and a sample of the desired outcome. A workbook with sample data is always helpful for getting a quick response from the community.
I am attaching a sample twbx and the underlying excel spreadsheet.
My problem is, that I want YTD 2013 to show 780 and not 100 (780-560-120). And if I understand how to do that, afterwards I hope to add 2014 numbers ect, so that I can compare YTD and monthly with last year.
I need calculated fields for calculating various ratios on the rows, so I think I need dimensions on columns, if that makes sense.