DAX formula for percentage of time a value appears for each name

[7ea8ea]

Hi All,

I have a data set that looks something like this:

Date	Name	T or F
18/11/2020	A	T
18/11/2020	B	T
19/11/2020	A	T
19/11/2020	B	F

How should I go about writing a DAX formula if I want to know the percentage of times there is T for a certain name. For example, I would like to write a measure for A which equals 100%, and a measure for B which is 50%. Any help would be appreciated. Thanks

[v-easonf-msft]

Hi, @7ea8ea 

You can  try measure as below:

Count_T = 
VAR a =
    COUNTX ( FILTER ( 'Table', 'Table'[T or F] = "T" ), 'Table'[Date] )
RETURN
    IF ( ISBLANK ( a ), 0, a )

Count = COUNTX('Table', 'Table'[Date])

Percentage% = [Count_T]/[Count]

Check sample file for more details.

Best Regards,
Community Support Team _ Eason

[amitchandak]

@7ea8ea , Try measures for

A

calculate( divide(countx(filter(table, table[T of F] ="T"), Table[Date]), countx(Table, Table[Date])) , Table[Name] ="A")

or

calculate( divide(countx(filter(table, table[T of F] ="T"), Table[Date]), countx(allselected(Table), Table[Date])), Table[Name] ="A")

for B

calculate( divide(countx(filter(table, table[T of F] ="T"), Table[Date]), countx(Table, Table[Date])) , Table[Name] ="B")

or

calculate( divide(countx(filter(table, table[T of F] ="T"), Table[Date]), countx(allselected(Table), Table[Date])), Table[Name] ="B")

[7ea8ea]

Hi, thanks for the quick response. I tried using the formula you have stated but it doesn't seem to work. Maybe it's because my data has more names and dates? (I have thousands of rows). Any possible reason as to why this formula will not work for my data?