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Anonymous's avatar
Anonymous
Not applicable
5 years ago
Solved

Weighted Average Calculation

Hey guys! I'm trying to formulate an weighted average for a product data. I have 4k rows of differents IDs divided by 9 categories (prod1 to prod9), each one with a value of time. I need an weighte...
Need Help
  • littlemojopuppy's avatar
    littlemojopuppy
    5 years ago

    I'm working with my assumption and came up with this...

     

    Weighted Average Product Time = 
    VAR AllProducts = 
        CALCULATETABLE(
            VALUES(Products[Product]),
            ALL(Products)
        )
    VAR	TotalProductCount =
	    CALCULATE(
		    [Product Count],
    		ALL(Products)
	    )
    RETURN 

    DIVIDE(
        SUMX(
            AllProducts,
            [Product Count] * [Total Product Time]
        ),
        TotalProductCount,
        BLANK()
    )

     

     

    Here's the results

    Hope this helps!  ğŸ™‚

     

     

CNENFRNL's avatar
CNENFRNL
Community Champion
5 years ago

Anonymous , I assume the logic of desired weighted average is like this

(total time of each product) * (occurrence of each product)/(total count of all products)

take Product1 for example:
(43.8+38.9+40.4+30.2)*(4/20)
Weighted Avg = 
VAR __t = COUNTROWS ( Table1 )
RETURN
    SUMX (
        DISTINCT ( Table1[Product] ),
        CALCULATE ( SUM ( Table1[Time] ) * COUNTROWS ( Table1 ) ) / __t
    )

 

btw, Excel array formula, our oldie but goodie, does the trick with ease,

=SUMPRODUCT(Table1[Time], COUNTIF(Table1[Product],Table1[Product]))/ROWS(Table1)

 

 

littlemojopuppy's avatar
littlemojopuppy
Community Champion
5 years ago

CNENFRNL  Didn't I offer a similar solution hours ago???