DAX Filter on matrix not working when using ALLSELECTED in measure

[Nico_Saar]

Hi everyone,

I need some help solving the following problem:

I have 3 tables (1 fact + 2 dimensions) which contain the following columns:

Fact_Table
ProductID	Grade	DefectCode	DateID
1	B	D1	20230101
1	B	D4	20230101
1	C	D4	20230101
2	B	D1	20230102
3	B	D2	20230105
3	C	D3	20230105
3	C	D4	20230105
4	B	D2	20230106
5	B	D1	20230114
5	C	D1	20230114

Dim_Table
DefectCode	DefectDescription
D1	Defect 1
D2	Defect 2
D3	Defect 3
D4	Defect 4

The second dimension table is a standard date dimension.

My goal is to build a matrix visual which looks like this:

Matrix
ProductID	Defect 1	Defect 2	Defect 3	Defect 4
1	B	A	A	C
2	B	A	A	A
3	A	B	C	C
4	A	B	A	A
5	C	A	A	A

• The column "ProductID" from my fact table is used as "Rows" in my matrix visual
• The column "DefectDescription" from my dimension table is used as a column in my matrix visual
• The column "Grade" should be used as values.
  • IMPORTANT: there could be multiple grades for one ProductID and for the same DefectCode. E.g. for ProductID = 1 and DefectCode = D4 there are 2 grades, "B" & "C".
    In this case, the "lowest" grade should be selected -> C
  • If there is no Grade available for a DefectCode, I want to show "A" instead of a blank cell.

In order to achieve this a created the following measure which I use in the matrix visual:

Grade =

VAR result =

    CALCULATE (

        MAX ( 'Fact_Table'[Grade] ),

        FILTER (           ALLSELECTED ( 'Fact_Table' ),

            'Fact_Table'[Grade] IN VALUES ( 'Fact_Table'[Grade] )

        )

    )

RETURN

    IF ( result <> BLANK (), result, "A+" )

On the first sight this works pretty well but a problem occures as soon as I want to filter the data inside the matrix using a slicer. (e.g. Date) Date date slicers is using the date dimension with a relationship to my fact table. When I set the date range starting at 20230102, all values for ProductID = 1 will bet set a "A". I know that the visual is supposed the replace not existing values with "A" but in this case, I don't want to show ProductID = 1 at all. 

I think that the problem is located in the "ALLSELECTED" part of the FILTER function but I can't figure out what to change in order to get the result needed.

Best regards

[v-rzhou-msft]

Hi @Nico_Saar ,

Here I create a sample to have a test.

I think you can try this code to create a measure.

M_Grade = 
VAR _Count =
    CALCULATE (
        COUNT ( Fact_Table[DefectCode] ),
        ALLEXCEPT ( Fact_Table, Fact_Table[ProductID], Dim_Date[DateID] )
    )
VAR _LowestGrade =
    CALCULATE ( MAX ( Fact_Table[Grade] ) )
RETURN
    IF ( _Count = 0, BLANK (), IF ( ISBLANK ( _LowestGrade ), "A", _LowestGrade ) )

Result is as below.

By Default:

Select "20230102" in slicer:

Best Regards,
Rico Zhou

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