New Measure with conditional counts

[pickslides]

Hi, 

I want to create a measure that counts the number of '1's in one field [Rank] and divides it by the total number of cells that have a numerical value populated in [Score], in other words ignore 'UN' or blank cells. I will put this in a table or matrix as a group by

Score	Rank
32	2
33	3
45	1
21	5
24	3
UN	-
34	1
UN	-
37	2

Result in this examaple would give 2/7

Thanks, MQ

[daXtreme · Accepted solution]

// Let your table be T.

[Measure] =
var NumberOfOnes =
    COUNTROWS(
        FILTER(
            T,
            // T[Rank] must be a numerical field
            // where "-" in your table must be
            // a real BLANK. Do not mix numbers
            // with text, please. Thanks.
            T[Rank] = 1
        )
    )
var NumberOfNonblanks =
    COUNTROWS(
        FILTER(
            T,
            T[Score] <> "UN"
        )
    )
var Output =
    DIVIDE( NumberOfOnes, NumberOfNonblanks )
return
    Output