Average over an 28 day period

[LRiley]

Hi all,

I'm hoping someone can help, I've been trying to Create a measure to work out an average of a column which has 1 & 0 over a 28 day period so when this is grouped by month or week in a matrix it would average the column 

Average over 28 day period = 
	VAR LAST_DATE = FIRSTDATE( 'Query1'[ORDERDATE].[Date])
	RETURN
		AVERAGEX(
			DATESBETWEEN(
				'Query1'[ORDERDATE].[Date],
				LAST_DATE,
				DATEADD(LAST_DATE,28,DAY)
			),
			CALCULATE(AVERAGE('Query1'[Call Driver]))
		)

This was my last attempt to create a measure.

as a calculated column, I would have used this 

Average over 28 days = 
VAR 28daysafter = [ORDERDATE] + 28
VAR IDtoCheck = [AGENTID]
RETURN
    CALCULATE (
        AVERAGE(Query1[Call Driver]),
        ALL(Query1),
        'Query1'[AGENTID] = IDtoCheck,
        Query1[ORDERDATE]+1 <= 28daysafter
    )

Any help would be appreciated 

Thanks 

Liam

[dax · Accepted solution]

Hi LRiley,

According to your description, it seems that you want to calculate rolling average based on month and id, right? If so, you could try to use below measure to see whether it work or not

rolling sum =
CALCULATE (
    SUM ( avg28[amount] ),
    FILTER (
        ALL ( avg28 ),
        avg28[date]
            <= MIN ( avg28[date] ) + 28
            && avg28[date] >= MIN ( avg28[date] )
            && avg28[id] = MIN ( avg28[id] )
            && avg28[month] = MIN ( avg28[month] )
    )
)

rolling avg = [rolling sum]/28

If this is not what you want, please correct me and inform me more detailed information(such as your sample data and expecting output), then I will help you more correctly.

Best Regards,

Zoe Zhi

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.