MEDIANX on the previous rows and FILTER that doesn’t seem to work with ALLEXCEPT

[Anonymous]

Hello,
I have a slight problem…
I have a table of products bought and the corresponding quantities. My goal is to predict (roughly) what will the next quantities I will buy… So I have made a measure that calculate the median of the quantities bought during the previous days to compare with the real value…

I made a simpler model to sort out all this…
The problem is that my measure works well when I consider just one product.

The visual:

The measure:

_median_apple =

VAR Current_date = MIN('Apple'[Date])

RETURN

VAR median_result =

    MEDIANX(

        FILTER(

            ALLEXCEPT('Apple', Apple[Label]),

            AND('Apple'[Date] < Current_date,

                'Apple'[Quantity] > 0

            )

        ),

        'Apple'[Quantity]

    )

RETURN

    IF(median_result = BLANK(),

    " ",

    median_result

    )

However, when I add another product in my table, I don’t get the right results…

The first line when “Pear” appears in the column “Label” should be left blank.

And it’s not the right result anyway…

Here’s the measure for the last table:

_median_apple_pear =

VAR Current_date = MIN('Apple-Pear'[Date])

RETURN

VAR median_result =

    MEDIANX(

        FILTER(

            ALLEXCEPT('Apple-Pear', 'Apple-Pear'[Label]),

            AND('Apple-Pear'[Date] < Current_date,

                'Apple-Pear'[Quantity] > 0

            )

        ),

        'Apple-Pear'[Quantity]

    )

RETURN

    IF(median_result = BLANK(),

    " ",

    median_result

    )

Shouldn’t the ALLEXCEPT filter the rows with the corresponding labels? It’s like it’s doing nothing.

Thank you for taking a look on my problem…

[Anonymous · Accepted solution]

Hi,@Anonymous 

Regarding the issue you raised, my solution is as follows:

1.First I have created the following table and the column names and data are the data you have given:

2. Below are the measure I've created for your needs:

Measure = 
var cc=CALCULATE(MEDIAN('Apple-Pear'[Quantity]),FILTER(ALLSELECTED('Apple-Pear'),'Apple-Pear'[Label]=MAX('Apple-Pear'[Label])&&'Apple-Pear'[Date]<MAX('Apple-Pear'[Date])))
RETURN IF(cc=BLANK()," ",cc)

3.Here's my final result, which I hope meets your requirements.

Please find the attached pbix relevant to the case.

Best Regards,

Leroy Lu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Anonymous]

It is indeed the results I wanted!

I have yet to understand why it didn’t work with my solution and how it works with yours…

Thank you very much. 🙂