topic Re: Weekly group average in DAX Commands and Tips

Weekly group average

sdgiss — Sun, 01 Nov 2020 03:46:10 GMT

Hello all,

I am hoping someone can help me with calculating a weekly average for a group. The following returns the sum of the weekly totals for all of the racers who were competing in that respective week (which is the result I get when dropping [Total Dist] into the pivot table by itself). The desired value is next to Fall-Week01 for both 2019 and 2020. I believe I need a count of athletes per week to get to the outcome I desire, but that is proving difficult as well. The second measure is close but I get the same racer count (total of all racers in database) for each week even though the total number of racers per week never tops 24 in 2020.

Thank you, in advance, for the help!

Weekly average dist:=AVERAGEX(VALUES(dDate[WeekNum]),[Total Dist])

Weekly Average Dist-distinctcount:=DIVIDE(AVERAGEX(VALUES(dDate[WeekNum]), [Total Dist]),DISTINCTCOUNT(dRacer[Racer]))

Re: Weekly group average

AlB — Sun, 01 Nov 2020 06:58:06 GMT

Hi sdgiss

To get an accurate answer, you'd need to show your data model, the tables relevant to these calculations and their relationships. If dRace is a dimension table, you have to do the distinctcount on the fact table where the info on the races is, since that will (supposedly) be filtered by the week number. Assuming [Total Dist] works correctly, try something like:

Measure =

DIVIDE( [Total Dist], DISTINCTCOUNT(FactTable[RacerID])

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Cheers

Re: Weekly group average

sdgiss — Sun, 01 Nov 2020 19:02:26 GMT

Thank you AlB! Your answer makes complete sense and have should have seen this when posting my question. It is such a simple solution, yet my narrow view of how this should work was blocking my ability to think clearly. I've gotten so caught up in always using my dimension tables that I forget about how, in some instances, they don't apply.

Have a great week!