How to do a measure that does a conditional, and a groupby and a count of that group by result

[Anonymous]

Hi,

I recently started using PowerBI and learning DAX. I want to convert a conditional pseudocode into DAX, that would result in a column named "Percentage". So my table consist of columns Company (Dole, Dyson, Monsanto, and etc...), Fruit Name (Apples, Bananas, Pears, Tomatos, Cucumbers, and etc.), and Food Group (Vegetable, Meats, and etc.)

Company | Fruit Name | Food Group

-----------------------------------------

Dole         |    Apple      |  Fruit 

Dyson      |     Chicken  |  Meat

Dole         |     Pear        | Fruit

Dole         |     Tomato   | Vegetable

Here's the pseudocode for the conditional:

if(FruitName = 'Apple')                                        //for the rows that have 'Apples'

     then( 1/count( Food Group for Company) )   //percentage of apples within Fruits distributed by Company: probably a groupby

else (1/count(Food Group for Company) )           //percentage of value within 'Food Group' by Company

The result would output within the measure, is a column for the percentages.

Company | Fruit Name | Food Group | Percentage

--------------------------------------------------------

Dole         |    Apple      |  Fruit            |   33.33%

Dyson      |     Chicken  |  Meat           |  100%

Dole         |     Pear        | Fruit            |   33.33%

Dole         |    Banana    | Fruit             |  33.33%

Dole         |     Tomato   | Vegetable   |  100%

Could you please show me a way to write this conditional in DAX?

Thanks

[Ashish_Mathur]

Hi,

Try this measure

Percentage = 1/CALCULATE(COUNTROWS(Table1),ALL(Table1[Fruit Name]))

[v-shex-msft · Accepted solution]

Hi @Anonymous,

You can try to use following measure formula, it will calculate percent of same fruit name based current food group:

Measure =
DIVIDE (
    CALCULATE (
        COUNTA ( Table[Fruit Name] ),
        ALLSELECTED ( Table ),
        VALUES ( Table[Food Group] ),
        VALUES ( Table[Fruit Name] )
    ),
    CALCULATE (
        COUNTA ( Table[Fruit Name] ),
        ALLSELECTED ( Table ),
        VALUES ( Table[Food Group] )
    ),
    -1
)

Regards,

Xiaoxin Sheng

[AlB]

Hi @Anonymous

What is the point of checking if it's an apple? You seem to want the same behaviour in all cases. Maybe I'm missing something.

Try this for your new column:

Percentage =
DIVIDE (
    1,
    CALCULATE ( COUNT ( Table1[Fruit Name] ), ALL ( Table1[Fruit Name] ) )
)