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sam_hoccane's avatar
sam_hoccane
Helper I
4 years ago
Solved

Multiplication with Previous Values

Excel File: Link

 

Hello,
Could you please help me write the following DAX Querry?

I want to create a measure to calculate values highlighted blue in the predicted-CO2 emission column using the formula given in the formula column.


So, for the forecast emission for July, I am taking the previous month's value ( i.e. actual emission in june=100) and multiplying it by 1.15 to get a 15% increase for July. For August, I take the forecast value of July (i.e. 100*1.15= 115) and multiply it by 1.15 to get a 15% increase ( (i.e. 115*1.15= 132). 

Any given help will be appreciated. 

 

Thanks,

Sam

 

 

 

 

  • tamerj1's avatar
    tamerj1
    4 years ago

    sam_hoccane 
    Your wishes are my command ğŸ˜‰ Here is the workable solution exactly as you wish 
    https://we.tl/t-bo914kjbfJ

    Predicted_Measure_4 = 
VAR CurrentEmission = SUM ( Data[Emission] )
VAR CurrentMonth = SELECTEDVALUE ( data[Year_Month] )
VAR CurrentForcast = SELECTEDVALUE ( Data[forcast] )
VAR PreviousMonths = FILTER ( ALLSELECTED ( Data ), data[Year_Month] < CurrentMonth )
VAR PreviousN_Months = FILTER ( PreviousMonths, Data[forcast] = "N" )
VAR PreviousN_Month = MAXX ( PreviousN_Months, data[Year_Month] )
VAR PreviousN_Emission = SUMX ( FILTER ( PreviousN_Months, data[Year_Month] = PreviousN_Month ), Data[Emission] )
VAR YearMonthOnly = DISTINCT ( SELECTCOLUMNS ( PreviousMonths, "@YearMonth", Data[Year_Month] ) )
VAR NumberOfY_Months = COUNTROWS ( FILTER ( YearMonthOnly, [@YearMonth] > PreviousN_Month && [@YearMonth] <= CurrentMonth ) ) + 1
VAR Result =
    IF (
        CurrentForcast = "N",
        CurrentEmission,
        PreviousN_Emission * POWER ( 1.15, NumberOfY_Months )
    )
RETURN
    Result

12 Replies

  • tamerj1's avatar
    tamerj1
    Community Champion
    4 years ago

    Hi sam_hoccane 
    Here is a sample file with the solution https://we.tl/t-cRyZP69iRO

    For calculated column:

     

     

    Predicted = 
VAR CurrentEmission = Sheet1[CO2 Emission]
VAR CurrentMonth = Sheet1[Month]
VAR PreviousMonths = FILTER ( Sheet1, Sheet1[Month] < CurrentMonth )
VAR PreviousN_Months = FILTER ( PreviousMonths, Sheet1[forecast] = "N" )
VAR PreviousN_Month = MAXX ( PreviousN_Months, Sheet1[Month] )
VAR PreviousN_Emission = MAXX ( FILTER ( PreviousN_Months, Sheet1[Month] = PreviousN_Month ), Sheet1[CO2 Emission] )
VAR NumberOfY_Months = COUNTROWS ( FILTER ( PreviousMonths, Sheet1[Month] > PreviousN_Month && Sheet1[Month] <= CurrentMonth ) ) + 1
VAR Result =
    IF (
        Sheet1[forecast] = "N",
        Sheet1[CO2 Emission],
        PreviousN_Emission * POWER ( 1.15, NumberOfY_Months )
    )
RETURN
    Result

     

    For measure:

     

    Predicted Measure = 
VAR CurrentEmission = SELECTEDVALUE ( Sheet1[CO2 Emission] )
VAR CurrentMonth = SELECTEDVALUE ( Sheet1[Month] )
VAR CurrentForcast = SELECTEDVALUE ( Sheet1[forecast] )
VAR PreviousMonths = FILTER ( ALL ( Sheet1 ), Sheet1[Month] < CurrentMonth )
VAR PreviousN_Months = FILTER ( PreviousMonths, Sheet1[forecast] = "N" )
VAR PreviousN_Month = MAXX ( PreviousN_Months, Sheet1[Month] )
VAR PreviousN_Emission = MAXX ( FILTER ( PreviousN_Months, Sheet1[Month] = PreviousN_Month ), Sheet1[CO2 Emission] )
VAR NumberOfY_Months = COUNTROWS ( FILTER ( PreviousMonths, Sheet1[Month] > PreviousN_Month && Sheet1[Month] <= CurrentMonth ) ) + 1
VAR Result =
    IF (
        CurrentForcast = "N",
        CurrentEmission,
        PreviousN_Emission * POWER ( 1.15, NumberOfY_Months )
    )
RETURN
    Result

     

     

  • Dhacd's avatar
    Dhacd
    Resolver III
    4 years ago

    Hi sam_hoccane,

    Please find another way to achieve the desired solution below,

     

    PredictedEmissions = 

Var TableN = filter('Table','Table'[forecast]="N")
Var MaxMonth = CALCULATE(MAX('Table'[Month]),TableN)
Var LastEmission = CALCULATE(MAX('Table'[CO2 Emission]),'Table'[Month]=MaxMonth,all('Table'))
Var Difference =datediff(MaxMonth,'Table'[Month],MONTH)
Var Predicted = (LastEmission *power(1.15,Difference))
return  if( 'Table'[forecast]="Y",Predicted,'Table'[CO2 Emission])

     


    Screenshot Attached

     



    If this post helps, then please consider accepting it as the solution to help the other members find it more quickly.

    Regards,

    Atma.

    • tamerj1's avatar
      tamerj1
      Community Champion
      4 years ago

      Dhacd 
      Good job!
      A few issues here.
      We don't know whether "N" and "Y" cycle overtime. Therefore the maximum Month with "N" might be after the first "Y" row.
      If a month reading is missing from the data (not taken or not recorded for any reason) the DATEDIFF will not provide a correct result. COUNTROWS seems to be more reliable in this case.

  • sam_hoccane's avatar
    sam_hoccane
    Helper I
    4 years ago

    tamerj1 

     

    Please use this link for sample data - DATA

    There was some issue  in early sample. 

     

    I would really appreciate for any given help. Thankuyou 🙂

      • sam_hoccane's avatar
        sam_hoccane
        Helper I
        4 years ago

        Yes please, I also want  apply filter on Manager level and also I need without manager filter.