12 week average for a designated column


Hello, I'm trying to write a Beastmode that calculates the 12 week average. The column I want to average is "Net Cost" and the date column is "Week Start Date".

The end goal is to have a beastmode that I can use as a value on a table that shows each distinct "Week Start Date" and the 12-wk-avg of Net Cost preceding that Week Start Date.

Even though it's not working, I'll attach a screenshot of the beastmode as it currently stands.

What am I doing wrong?


Best Answer


  • RobSomers

    @AO3 Is the grain of your data week start date? Ex: Your data is simply Week Start Date and Net Cost, and there aren't any repeats of dates in Week Start Date?

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  • MarkSnodgrass
    Answer ✓

    Are you getting an error? Or just the wrong number? It looks like you are totaling 13 numbers (current week plus last 12) and then dividing by 12. Depending on what you are wanting to do, I would either drop the current week, or the last week.

    This post has good documentation on this if you haven't already looked at it.

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