cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
music43
Helper II
Helper II

MAX difference between current row and previous row as a measure

Hi 
I am trying to learn how to DAX and I have been trying to figure this out for the last couple of days, but getting nowhere.

I am trying to subtract the value of the previous row from the of current row (which I appear to have managed) and then get the overall MAX. In the example below returning 15.
music43_0-1665064592845.png

My questions are:
1) Is the LOOKUPVALUE the best way to get the prevVal or are there better ways of doing this?
2) How do I then get the MAX?

I tried MAXX around the RETURN formula but wasn't getting anywhere...

Any guidance is appreciated.

Thanks

Oli

 

1 ACCEPTED SOLUTION
Jihwan_Kim
Super User
Super User

Hi,

I tried to create a sample pbix file like below.

Please check the below picture and the attached pbix file.

Jihwan_Kim_0-1665067219561.png

 

 

Expected result measure: = 
MAXX (
    ADDCOLUMNS (
        FILTER (
            ADDCOLUMNS (
                Data,
                "@prevvalue",
                    CALCULATE (
                        SUM ( Data[Value] ),
                        FILTER ( Data, Data[Index ID] = EARLIER ( Data[Index ID] ) - 1 )
                    )
            ),
            [@prevvalue] <> BLANK ()
        ),
        "@diff", Data[Value] - [@prevvalue]
    ),
    [@diff]
)

 

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


Go to My LinkedIn Page


View solution in original post

1 REPLY 1
Jihwan_Kim
Super User
Super User

Hi,

I tried to create a sample pbix file like below.

Please check the below picture and the attached pbix file.

Jihwan_Kim_0-1665067219561.png

 

 

Expected result measure: = 
MAXX (
    ADDCOLUMNS (
        FILTER (
            ADDCOLUMNS (
                Data,
                "@prevvalue",
                    CALCULATE (
                        SUM ( Data[Value] ),
                        FILTER ( Data, Data[Index ID] = EARLIER ( Data[Index ID] ) - 1 )
                    )
            ),
            [@prevvalue] <> BLANK ()
        ),
        "@diff", Data[Value] - [@prevvalue]
    ),
    [@diff]
)

 

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


Go to My LinkedIn Page


Helpful resources

Announcements
Carousel_PBI_Wave1

2023 Release Wave 1 Plans

Power BI release plans for 2023 release wave 1 describes all new features releasing from April 2023 through September 2023.

Power BI Summit Carousel 2

Global Power BI Training

Make sure you register today for the Power BI Summit 2023. Don't miss all of the great sessions and speakers!

BizApps LATAM 2023

Business Application LATAM Summit 2023

Join the biggest FREE Business Applications Event in LATAM this February.

Power Platform Bootcamp

Global Power Platform Bootcamp

In this bootcamp we will deep-dive into Microsoft’s Power Platform stack with hands-on sessions and labs, delivered to you by experts and community leaders.

Top Solution Authors
Top Kudoed Authors