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Geometric mean based on measure wrong
I am sure powerbi can do what excel can 🙂 I am just doing it wrong. Goal: calculate the geometric mean for a group of return values. I have the values, but fail to get the correct geomean in Po...
You've got a couple of issues. First, you calculate _ret once and use that same single value for each year. Second, I think you need 1 + _ret inside your GEOMEANX.
Try this:
TWR = VAR _YearReturns_ = ADDCOLUMNS ( VALUES ( Data[Year End] ), "@Return", [Return] ) VAR _NonBlank_ = FILTER ( _YearReturns_, NOT ISBLANK ( [@Return] ) ) VAR _Geomean = GEOMEANX ( _NonBlank_, 1 + [@Return] ) RETURN IF ( NOT ISBLANK ( _Geomean ), _Geomean - 1 )I think I got it.
I changed the geomeanx to the dates table instead the data table and it worked.
TWR test=GEOMEANX('Dates of Valuation', [GeoMeanvalues])-1
yes geomean needs pos values only so +1 is needed, i had backed that into geomeanvalues.
Hi, how did you define the geomean values column? or is it a measure, anyway can you give more information