It would help to see your TWBX workbook even with some dummy data
the first thought is you should pivot the data to form a tall narrow column of data Pivot Data from Columns to Rows
then it will be a straight forward aggregation of the data
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PFA the tableau workbook. I want to separate out the turbine number and then be able to use it as a filter so that the same graph is there for any turbine ID.
PowerDef.twbx 8.5 MB