Calculating Cumulative total of average using DAX expression

[Anonymous]

Hello there, 

I am stuck with one scenario and having tough time figuring out the running total of averages using DAX expression, i would be glad if anyone could help me out on this, 

below is the scenarios,

YEAR	OVC_Value	Average of OVC_Value	ExpectedColumn: Cumulative Average
2015	1055603.6	1466.116111	1466.116111
2016	51279418.59	26763.78841	28229.90452
2017	409404085.2	145799.1756	175495.1963
2018	798181874.5	264473.7822	438502.8623
2019	1243794804	412125.5151	850628.3774
2020	2303576361	763279.1124	1613907.49
2021	3163317748	1048150.347	2662057.837
2022	3198071221	1059665.746	3721723.583
2023	2824829664	935993.9244	4657717.507
2024	1342139881	451898.9497	5109616.457
2025	17620535.63	7667.770073	5117284.227

as we can see there are different OVC_Value for different years, 3rd column 'Average of OVC_Value' is the instance of first OVC_VALUE and i have applied Average Data operation on it,  what i need is 4th Column, i.e. ExpectedColumn: Cumulative Average which will calculate the values of average cumulatively as displayed in column,

is there any way to figure this out with DAX expression, i am sure there should be one but i am having hard time to figure that out, 

any help would be greatly appreciated, Thanks alot in advance,

Regards, 
Malav

[Anonymous]

HI @Anonymous,

You can try to use below column formula to get cumulative average value from summary table.

Column formula:

Calculate column =
SUMX (
    FILTER (
        SUMMARIZE (
            Table,
            [Year],
            "Total Value", SUM ( Table[OVC_Value] ),
            "AVG Value", AVERAGE ( Table[OVC_Value] )
        ),
        [Year] <= Table[Year]
    ),
    [AVG Value]
)

If above not help, please share some sample data for test and coding formula.

Regards,

Xiaoxin Sheng

[Anonymous]

Hi Xiaoxin Sheng, 

I tried the given solution but it did not work because i belive that while adding cumulative average it is also adding the cumulative counts of values and as a result the cumulative average keeps in decreasing, i am attaching the database, thank you very much for helping me on this... 

https://files.fm/u/3ma7vse6

Regards,

Malav 

[Anonymous · Accepted solution]

Hi @Anonymous,

After play with your data, I create a measure to calculate cumulative average:

Measure =
VAR currYear =
    MAX ( OVC_data[OVC_YEAR] )
RETURN
    SUMX (
        FILTER (
            SUMMARIZE (
                ALLSELECTED ( OVC_data ),
                [OVC_YEAR],
                "Total Value", SUM ( OVC_data[OVC_Value] ),
                "AVG Value", AVERAGE ( OVC_data[OVC_Value] )
            ),
            [OVC_YEAR] <= currYear
        ),
        [AVG Value]
    )

Regards,

Xiaoxin Sheng