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Anonymous's avatar
Anonymous
Not applicable
3 years ago
Solved

get value from previous row

Hi all,

 

I have the following table structure within power bi

DateTimeINOUTINSIDE
28/11/2022 11:00:001 1
28/11/2022 12:00:00322
28/11/2022 13:00:00451
28/11/2022 14:00:00212

 

Is it possible to calculate the INSIDE column within power bi via a measure or calculated column?

When doing this in Excel it is very easy to calculate this, just take one cell from above and then add this number with the outcome of the IN - OUT calculation. That would be something like this in Excel (where C stands for INSIDE, A for IN and B for OUT.): 

=C1 + (A2 - B2) 

  

Need Help
  • v-yueyunzh-msft's avatar
    v-yueyunzh-msft
    3 years ago

    Hi , Anonymous 

    According to your description, you want to "get value from previous row".

    First , you need to sort the [DateTime] in Power Query and you need to check the [DateTime] is single value in each row. IF not , you need to add an index column in Power Query Editor as a row number to judge .

    Here, i use your [DateTime] as a row number to check which row is calculating.

    Then we can click "New Column" to add a calculated column by this dax code:

    Column = var _cur_row = [DateTime]
var _t =ADDCOLUMNS( FILTER('Table' , 'Table'[DateTime]<= _cur_row) , "cal" , [IN] - [OUT])
return
SUMX(_t ,[cal])

    Then we can meet your need:

    Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

     

    Best Regards,

    Aniya Zhang

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

  • FreemanZ's avatar
    FreemanZ
    3 years ago

    hi Anonymous 

    you may also add a calculated column like:

    INSIDE2 = 
SUMX(
    FILTER(
        TableName, 
        TableName[DateTime]<=EARLIER(TableName[DateTime])
    ),
    TableName[IN] - TableName[OUT]
)

     

    it worked like:

3 Replies

  • v-yueyunzh-msft's avatar
    v-yueyunzh-msft
    Community Support
    3 years ago

    Hi , Anonymous 

    According to your description, you want to "get value from previous row".

    First , you need to sort the [DateTime] in Power Query and you need to check the [DateTime] is single value in each row. IF not , you need to add an index column in Power Query Editor as a row number to judge .

    Here, i use your [DateTime] as a row number to check which row is calculating.

    Then we can click "New Column" to add a calculated column by this dax code:

    Column = var _cur_row = [DateTime]
var _t =ADDCOLUMNS( FILTER('Table' , 'Table'[DateTime]<= _cur_row) , "cal" , [IN] - [OUT])
return
SUMX(_t ,[cal])

    Then we can meet your need:

    Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

     

    Best Regards,

    Aniya Zhang

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

  • FreemanZ's avatar
    FreemanZ
    Super User
    3 years ago

    hi Anonymous 

    you may also add a calculated column like:

    INSIDE2 = 
SUMX(
    FILTER(
        TableName, 
        TableName[DateTime]<=EARLIER(TableName[DateTime])
    ),
    TableName[IN] - TableName[OUT]
)

     

    it worked like:

  • Anonymous's avatar
    Anonymous
    Not applicable
    3 years ago

    Thank you both v-yueyunzh-msft and FreemanZ . Both of you solutions works very good and do the job in a much better way than what I had created myself!

     

    I have made a small adjustment to the code so that it resets the counts to 0 every next day and also added a function that it prevents the number to be below 0. See the code below:

     

    INSIDE = 
MAX(0,
    SUMX(
        FILTER(
            Footfall,
            'Footfall'[Date.1] = EARLIER('Footfall'[Date.1]) &&
            Footfall[Date / time] <= EARLIER(Footfall[Date / time])
        ),
        Footfall[bezoekers(In)] - Footfall[bezoekers(Out)]
    )
)

     

     

    Thank you again both for your solution and help!