Rolling 4 week average by state

[Jacob1832]

I am trying to create a rolling 4 week average of the Actuals column and grouped on the State. 

So startring at the bottom, the 4 week average for TX in the final row would be, (1+ 0 (no sales in week of may22) + 1+3) / 4 (number of weeks). 

So in think for a given week and state observation, i would need to sum all 'Actual' values in a 4 week period including the current obersation, grouped by the State, then divide by the number of weeks.

[v-cgao-msft · Accepted solution]

Hi @Jacob1832 ,

Please try this measure.

Rolling 4 week average of the Actuals = 
VAR _given_week =
    MAX ( 'Table'[Week] )
VAR _sum =
    CALCULATE (
        SUM ( 'Table'[Actuals] ),
        'Table'[Week] >= _given_week - 21
            && 'Table'[Week] <= _given_week
    ) 
VAR _average =
    DIVIDE ( _sum , 4 ) + 0
RETURN
    _average

Attached PBIX file for reference.

Best Regards,
Gao
Community Support Team

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