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DEMDEJ's avatar
DEMDEJ
Frequent Visitor
3 years ago
Solved

Calculate Threshold Analysis

This is what I want to do:   But I have two issues that I have been stuck with: 1. When calculating my month fields, I can only go back to the previous month using this formula, else, it's b...
  • WinterMist's avatar
    WinterMist
    3 years ago

    DEMDEJ 

     

    Step 1 - Transform your Month only column to a full date.

    - Sep 2022 becomes 9/1/2022.

    - Feb 2023 becomes 2/1/2023

    This is easily done in Power Query Editor.

     

    Step 2 - Also in Power Query Editor, select all the month columns & unpivot them so that instead of a separate column for each month-year, you now only have 1 column for "Date" & 1 column for "Value" (or whatever you want to rename it).

     

     

    Step 3 - In the model, create the 1:* relationship between 'Date'[Date] & 'Data'[Date]

     

     

    Step 4 Create a new measure called _B4PrevMONTH V2 .

    This resolves the issue of (2 - 2 = 0) the invalid month number.

     

     

     

    You can upload a PBIX to Google Drive, make it public & then share the link here on forums.

     

    This should resolve the issue with your blank values for the "2 months ago" measure.

     

    Regards,

    Nathan

     

     

     

     

WinterMist's avatar
WinterMist
Impactful Individual
3 years ago

DEMDEJ 

 

I'm not sure I completely understand.

 

1) Are the numbers in the rows of the month columns actual data?  Or are they calculations?  Do you have a test data set sample so that we could look at an isolated example of the problem?

 

2) If I understand correctly:

- The [_PrevMONTH] measure works no problem.

- The [_B4PrevMONTH] measure does NOT work, & returns only BLANKS.

Is it possible for you to include a screenshot of the visual where you are including this measure & getting blanks so we can get an idea of the filter context?

 

3) How did you create your calendar table?  If by DAX, can you share the DAX used?  What is the start date & end date?

 

NOTE: It will not be sufficient to only have month.  For example, if the current month is Feb (month #2) & you try to subtract 2, you'll get 0, which is not a valid month.

 

Regards,

Nathan

 

 

DEMDEJ's avatar
DEMDEJ
Frequent Visitor
3 years ago

WinterMist  

1. It's actual data aggregated for each month

2. I added a few things in the calendar by DAX, but imported most.

Feb #2 - 2 months = 0 totally makes sense! Can you help with the work around?

 

How can I upload the powerbi file?

 

 

TYPEDATEMONTHYEARDAY
CASE22/20/2023FEB2022FRI
CASE21/31/2023JAN2022MON
CASE21/21/2023JAN2022FRI
CASE212/24/2022DEC2022FRI
CASE212/24/2022DEC2022SAT
CASE312/11/2022DEC2022MON
CASE111/8/2022NOV2022FRI
CASE211/20/2022NOV2022FRI
CASE110/17/2022OCT2022MON

 

Here's what the sample look like