Hi djoekdjoek,
I follow the steps inthis article and success to get the average per day in period of month.
The point is add DAX measures:
- Total Insidents = SUM([insidents])
- Distinct Day Count = DISTINCTCOUNT([Date])
- Daily Average = [Total insidents]/[Distinct Day Count]
You should modify the formula according to your column title.
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Regards,
Eric