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MrGriff's avatar
MrGriff
Frequent Visitor
5 years ago
Solved

Working out difference between rows

Hi, 

How do I work out the difference between rows? 
 

I have the below dataset but would like to create the column "Power Used" this would show me as below;

 

DateNamePowerPower Used
03/05/2021 12:38Projector19634204
03/05/2021 12:54Projector19634244
03/05/2021 13:10Projector19634283
03/05/2021 13:26Projector19634314
03/05/2021 13:42Projector19634354
03/05/2021 13:58Projector19634394
05/05/2021 04:12Computer300086917
05/05/2021 04:28Computer300088617
05/05/2021 04:44Computer300090318
05/05/2021 05:00Computer300092119
05/05/2021 05:16Computer300094017
05/05/2021 03:24Light758055521
05/05/2021 03:40Light758057625
05/05/2021 03:56Light758060123
05/05/2021 04:12Light758062423
05/05/2021 04:28Light758064723
05/05/2021 04:44Light758067021

 

Is there a way to do this in the M Code?

 

Thanks

Need Help
  • Jihwan_Kim's avatar
    Jihwan_Kim
    5 years ago

    Hi, MrGriff 

    Please check the below picture and the formula for creating a new column.

     

     

    Power Used CC =
    VAR currentname = 'Table'[Name]
    VAR currentpower = 'Table'[Power]
    VAR nextpower =
    CALCULATE (
    MIN ( 'Table'[Power] ),
    FILTER ( 'Table', 'Table'[Name] = currentname && 'Table'[Power] > currentpower )
    )
    RETURN
    IF ( NOT ISBLANK ( nextpower ), nextpower - currentpower )
     

    Hi, My name is Jihwan Kim.


    If this post helps, then please consider accept it as the solution to help other members find it faster, and give a big thumbs up.


    Linkedin: linkedin.com/in/jihwankim1975/

    Twitter: twitter.com/Jihwan_JHKIM

3 Replies

  • Jihwan_Kim's avatar
    Jihwan_Kim
    Super User
    5 years ago

    Hi, MrGriff 

    Please check the below picture and the formula for creating a new column.

     

     

    Power Used CC =
    VAR currentname = 'Table'[Name]
    VAR currentpower = 'Table'[Power]
    VAR nextpower =
    CALCULATE (
    MIN ( 'Table'[Power] ),
    FILTER ( 'Table', 'Table'[Name] = currentname && 'Table'[Power] > currentpower )
    )
    RETURN
    IF ( NOT ISBLANK ( nextpower ), nextpower - currentpower )
     

    Hi, My name is Jihwan Kim.


    If this post helps, then please consider accept it as the solution to help other members find it faster, and give a big thumbs up.


    Linkedin: linkedin.com/in/jihwankim1975/

    Twitter: twitter.com/Jihwan_JHKIM

    • MrGriff's avatar
      MrGriff
      Frequent Visitor
      5 years ago

      Jihwan_Kim 

      Sorry to re-open this again but I have seen that the calculation is wrong, If the current and next power are the calculation just looks a the next value that is higher in value... but really I if the value is the same the result should be 0..

       

      If you can help that would be great