Calculate the difference between multiple columns in matrix

[Christian_Power]

Hello!

I'm scratching my brain out of this calculation.. Can anyone maybe help me on the way if it's even possible? 🙂

I'm trying to calculate difference between multiple columns in a Matrix.

I just want to see the different between each "Date" column of my choice, for example to see how many calls where made in "2018-03" vs "2019-03".

So the "Total Difference" is the correct value but since i want to select more than just the two dates then i can't use the "Total" value anymore because i just want to see the difference to the "Count of Call ID" value of the right column.

The "Difference" measure is:

Difference = CALCULATE (
        COUNT('Table1'[Call ID]),
        FILTER ('Table1', 'Table1'[Date] = MAX ('Table1'[Date]))
    )
        - CALCULATE (
            COUNT('Table1'[Call ID]),
            FILTER ('Table1', 'Table1'[Date] = MIN ('Table1'[Date]))
        )

Example data:

[v-yuezhe-msft · Accepted solution]

@Christian_Power ,

Create the following column in your table.

NEWDATE = DATE(LEFT(Table1[Date],4),RIGHT(Table1[Date],2),1)

Then create a new table using DAX below.

Table = SUMMARIZE(Table1,Table1[Cities],Table1[Date],Table1[NEWDATE],"countvalue",COUNT(Table1[Call ID]))

Create the diff column in  the new table as below.

diff = var pre= CALCULATE(FIRSTNONBLANK('Table'[countvalue],1),FILTER('Table','Table'[NEWDATE]>EARLIER('Table'[NEWDATE])&&'Table'[Cities]=EARLIER('Table'[Cities]))) return IF(ISBLANK(pre),BLANK(),pre-'Table'[countvalue])

Regards,
Lydia