Matrix total not average

[newhopepdx]

Visual is a matrix with Venues as rows and months as columns.  Values are attendance totals. Measure calculates the Average monthly attendance.

AvAtt = AVERAGEX( 'tblAttendance', 'tblAttendance'[Attendance] )

Cells are accurately reflecting the average attendance for each event in the month (5 in the case of April). The column total (128) is incorrect and should be 512. I know it has to do with averaging averages, but can't find the right DAX formlua.

Here's a screen print of the matrix and a spreadsheet showing the raw data and hand calculated values expected...

[tamerj1 · Accepted solution]

Hi @newhopepdx 

please try

AvAtt =
SUMX (
VALUES ( 'tblAttendance'[Venue] ),
CALCULATE ( AVERAGE ( 'tblAttendance'[Attendance] ) )
)

[newhopepdx]

Elegant!

"VALUES", I was trying to configure something with SUMMERIZE and hadn't hit on the right arguments.

[tamerj1]

@newhopepdx 

SUMMARIZE would work just fineand probably more efficient without the need for CALCULATE

AvAtt =
SUMX (
SUMMARIZE (
'tblAttendance',
'tblAttendance'[Venue],
"@Average", AVERAGE ( 'tblAttendance'[Attendance] )
),
[@Average]
)

[newhopepdx]

Just curious... why the @before the Average? Just a personal convention, or does it have a more important meaning?

Thanks

[tamerj1]

@newhopepdx 

Just to distinguish between newly created columns and original data model measures. 

[Greg_Deckler]

@newhopepdx First, please vote for this idea: https://ideas.powerbi.com/ideas/idea/?ideaid=082203f1-594f-4ba7-ac87-bb91096c742e

This looks like a measure totals problem. Very common. See my post about it here: https://community.powerbi.com/t5/DAX-Commands-and-Tips/Dealing-with-Measure-Totals/td-p/63376

Also, this Quick Measure, Measure Totals, The Final Word should get you what you need:
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

Also: https://youtu.be/uXRriTN0cfY
And: https://youtu.be/n4TYhF2ARe8