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Lew_14's avatar
Lew_14
Frequent Visitor
4 years ago

Populate missing data using last populated row

I'm looking for some help!   I have a table that shows minute-by-minute data logs for machines in a production environment. Each row should have a 'RefNo' value however i'm finding that the last se...
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Anonymous's avatar
Anonymous
Not applicable
4 years ago

Hello Lew_14 

You can create a calculated column. If RefNo is blank and value > 0 then Index else blank().

  • Lew_14's avatar
    Lew_14
    Frequent Visitor
    4 years ago

    I'm not sure how that would work, Tarun. Could you please explain further? I've previously added a calculated column that brings across the previous RefNo if the current RefNo is blank (using the Index, DAX below) but obviously that only works for the last populated row +1, whereas i need all unpopulated rows to be filled in with the RefNo for that particular run.

     

    RefNo (amended) = if(ISBLANK('TABLE'[RefNo]),LOOKUPVALUE('TABLE'[RefNo],'TABLE'[Index],'TABLE'[Index]-1),'TABLE'[RefNo])
     
    It could work by capturing the index of the last populated row of RefNo for any given run and then bring across that variable to any row where the RefNo is blank, however i'm not sure how i'd do this.
     
    Many thanks
    • Anonymous's avatar
      Anonymous
      Not applicable
      4 years ago

      Hello Lew_14 
      Could you please share the pbix file after removing the sensitive information? Also, please share the expected outcome also.

      Thank You.

    • v-easonf-msft's avatar
      v-easonf-msft
      Community Support
      4 years ago

      Hi, Lew_14 

      Try calculated columns as below:

      Index (amended) = 
VAR a =
    CALCULATE (
        Max ( 'Table'[Index] ), 
        FILTER (
            'Table',
            'Table'[Index] <= EARLIER ( 'Table'[Index] )  
                && 
                'Table'[RefNo] <> BLANK () 
        )
    )  
RETURN
    IF ( ISBLANK ( 'Table'[RefNo] ), a, 'Table'[Index] )
      RefNo2 (amended) = 
IF (
    ISBLANK ( 'TABLE'[RefNo] ),
    LOOKUPVALUE ( 'TABLE'[RefNo], 'TABLE'[Index], 'Table'[Index (amended)] ),
    'TABLE'[RefNo]
)

      Best Regards,
      Community Support Team _ Eason

      • Lew_14's avatar
        Lew_14
        Frequent Visitor
        4 years ago

        Hi v-easonf-msft,

         

        Thankyou for your reply, this works perfectly...almost!

         

        I mentioned that there were blank RefNo's at the start of the run and this wasn't an issue however it seems i was wrong now i've impemented your suggestion. Once the count resets to 0 i'd like the RefNo to be remain blank (as it is currently bringing across the previous RefNo and this is altering some of my visuals incorrectly), however it would be perfect if the code could look forward and grab the next available RefNo once the 'Value' count resets to 0 and the RefNo is blank, if that's possible?

         

        Many thanks,

        Lewis