Difference from previous Row

[NewbieJono]

hello, I am looking to calculate the difference between the preview row in a matrix table.

I can do this in Excel, but not sure where to start with DAX.

[v-yifanw-msft · Accepted solution]

Thank you @VahidDM  for your prompt reply.

Hi @NewbieJono  ,

Depending on the information you have provided, you can add a new measure:

NEW Difference =
VAR _Totalswtiches =
    SELECTEDVALUE ( 'Table'[Total_switches] )
VAR _MOVEAVERAGE =
    MAXX (
        FILTER ( ALL ( 'Table' ), [Total_switches] < _Totalswtiches ),
        [NEW Average]
    )
RETURN
    IF ( _Totalswtiches = 0, 0, SUM ( 'Table'[NEW Average] ) - _MOVEAVERAGE )

 Final output:

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Best Regards,

Ada Wang

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[VahidDM]

Hi @NewbieJono 

Create a measure using this DAX Expression:

Difference = 
VAR _L =
    CALCULATE (
        SUM ( 'Table'[Calendar Days] ),
        'Table'[Col Numbe]
            = ( MAX ( 'Table'[Col Numbe] ) - 1 )
    )
RETURN
    SUM ( 'Table'[Calendar Days] ) - _L

Output:

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[NewbieJono]

Thank you, is there any method to stop day zero and the last zero showing incorrect. day zero difference should be 0. last day not calculating correct