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Anonymous
Not applicable

Misunderstanding Lookupvalue

‎04-05-2017 08:46 AM

Hello all, 

I'm trying to do something which on the surface seems very simple but I'm struggling to make it work.

 

I have a table of users which are taking periodic tests. 

I've created a measure which shows me the date that a user last took a test:

Last Test Date = LastDate([TestDate])

 

Easy,

 

Now I'd like to see the last  score achieved by the student so I created another measure

 

Last Score = LookupValue([TestScore],[TestDate],[Last Test Date])

 

It always complains that I'm passing multiple values!

I've read that I shouldn't be using Lookups in measure but I can't think of another simple way to achieve what I want? Help greatly appreciated.

 

Thanks!

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Sean
Community Champion
Community Champion
In response to Anonymous

‎04-05-2017 10:29 AM

@Anonymous

There are several things you can do first

Last Score Measure 1 = 
CALCULATE (
    LASTNONBLANK ( 'Table'[Score], 1 ),
    VALUES ( 'Table'[Student] ),
    LASTDATE ( 'Table'[Date] )
)

Or you can imporve the above by calculating the average score for all students that took a test on the last day to be displayed in the total row

Last Score Measure 2 =
IF (
    HASONEVALUE ( 'Table'[Student] ),
    CALCULATE (
        LASTNONBLANK ( 'Table'[Score], 1 ),
        VALUES ( 'Table'[Student] ),
        LASTDATE ( 'Table'[Date] )
    ),
    DIVIDE (
        CALCULATE (
            SUM ( 'Table'[Score] ),
            VALUES ( 'Table'[Student] ),
            LASTDATE ( 'Table'[Date] )
        ),
        CALCULATE ( DISTINCTCOUNT ( 'Table'[Student] ), LASTDATE ( 'Table'[Date] ) ),
        0
    )
)

My Measures work with or without a separate student table!

Last Score on Last Date.png

Hope this helps! Smiley Happy

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