Get Insured Members with No Claims

[Anonymous]

Hello,

I am looking for some help writing a DAX formula to find the average weight of members who did not have any claims during the year. 

My Table has the total amount of claims for each member by month, as follows:

Month_Bracket	MemberID	Claimed Amount($)	Weight_lbs
201905	xyz	1000.0	220
201905	ijw	45.12	170
201905	rtl	0	110
201906	rtl	0	110
201906	xyz	0	220
201912	eet	147.85	145

so in this contrived example, only member rtl had zero claims throughout 2019, so the average weight would be 110lbs. 

Any idea how I would go about doing this in DAX?

I am able to write measures that filter the table, but I can't figure out how to operate on the filtered table.

[AlexisOlson · Accepted solution]

Let's do it in two steps. First, calculate the total claims for each member. Then, filter and average.

AvgWeight =
VAR MemberSummary =
    SUMMARIZE (
        Table1,
        Table1[MemberID],
        "TotalClaimed", SUM ( Table1[Claimed Amount($)] ),
        "Weight", AVERAGE ( Table1[Weight_lbs] )
    )
RETURN
    AVERAGEX ( FILTER ( MemberSummary, [TotalClaimed] = 0 ), [Weight] )

This assumes all the dates are in the same year.

[Anonymous]

Wow, this is elegant and simple! 

I was trying to use SUMMARIZE but was missing the final step of filtering. Thank you so much.