I'm still a newbie and hoping to get some DAX help for a measure I'm trying to add. I've searched many forums and youtube tutorials with no definitive luck! I've also tried using rolling average quick measure however I get ERROR("Time intelligence quick measures can only be grouped or filtered by the Power BI-provided date hierarchy or primary date column.")in the calculation and I've ensured Auto Date/Time Time intelligence has been ticked in options for Data Load and also Marked my table as date.
Basically, at each date, I wanted to calculate the moving average of sales for that date, say 7 days before and after so total 14 days. See my basic average excel calculation below for a mockup with expected results in column C. Cell C23 shows my excel formula for your info.
I've been using the solution below to calculate the Average 14 Days which works well provided by @parry2k , however I need to add a day of week (DOW) slicer or filter criteria that will onlyconsider the day of week data/values selected for the calculation of the average.
Avg 14 Days =
VAR __startDate = CALCULATE( MIN( Table1[Date] ), DATEADD( Table1[Date], -6, DAY ) )
VAR __endDate = CALCULATE( MAX( Table1[Date] ), DATEADD( Table1[Date], 7, DAY ) )
CALCULATE( AVERAGE( Table1[SALES] ), DATESBETWEEN( Table1[Date], __startDate, __endDate ) )
Note: I've only averaged 3 days in the above example (plus and minus 1 day) just to show what I'm expecting.
The formula in the second screenshot is not only averaging 3 numbers - it is averaging all numbers from row 48 to 62. What exactly do you want to do? - Average only 3 numbers or all numbers between rows 48 and 62?
Thanks for getting back to me, yes, I would like to only average the 3 values (for example) in row 48, 55, 62 (i.e. the 3 Saturdays) when the DOW selector has been selected to Saturday.
Note: as this is dummy data, I only chose 3 days, 1 day before and 1 day after because my original sample data was small but in the working version/data set there will be two or more years worth of data and I would like the formula to be flexible so that the measure can include say 6 Saturday's before and 7 Saturday's after.