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ElliotP's avatar
ElliotP
Post Prodigy
10 years ago
Solved

Moving Average

Hi,   I've just started using PowerBI and I'm a massive fan of the tool. I've been trying to calculate a simple moving average for Months vs Sessions.   I've tried quite a lot of things, googling...
General Comment
Need Help
  • v-sihou-msft's avatar
    v-sihou-msft
    10 years ago

    ElliotP

     

    Firstly you need a column of date with full date format. Then you can use calculated measure to get the expected result. Please refer to following steps.

     

    1. Create a calculated column for the date.
      FullDate =
DATE ( 2016, 'Session'[Month of the Year], 1 )
    2. Create a measure for 3 months moving average. You can change the number of months if you want.
      Moving_Average_3_Months = 
CALCULATE (
    AVERAGEX ( 'Session', 'Session'[Sessions] ),
    DATESINPERIOD (
        'Session'[FullDate],
        LASTDATE ( 'Session'[FullDate] ),
        -3,
        MONTH
    )
)
    3. Drag the Line Chart into your canvas as below.
sdjensen's avatar
sdjensen
Solution Sage
10 years ago

Hi,

 

I would recommend to read this article.

 

Basically you need to create a period table containing all the dates in your data set and then connect your table with your values to this period table. The article talk about marking your table as a period table - this is not needed in Power BI it's only needed in Power Pivot for Excel. There is many awesome articles about how you can create a period table in Power BI - I like this one.

 

If you only have a month value in your values table then you need to convert this into a date to be able to create the relationship from this table to your period table - just pick the first day of the month.