Beast Mode Calculation
Hi Everyone,
Trying to come up with a beast mode calculation to calculate the percent difference between last weeks count and this weeks count.
This is the example of how the data would look:
Also I would like to know how to do a rolling 4 weeks count so an additional field with header 4 week count and then the percent difference between the four weeks count.
Let me know please and thanks!
Answers

@Shumilex I would point you to this post by @GrantSmith that should do the trick for you. You would add an extra calculation to divide the current week number from the previous week.
https://dojo.domo.com/discussion/52679/domoideasconferencebeastmodesrollingaverages#latest
0 
Hi @Shumilex
I'd recommend utilize a custom date offset where you can compare one date to a different date. In your case you're just wanting to know the value from last week. I've done a write up / walk through of this methodology before. You can find more information here: https://dojo.domo.com/discussion/53481/amoreflexiblewaytodoperiodoverperiodcomparisons#latest
You'd then just need to calculate your percentage difference:
(SUM(CASE WHEN `Period Type` = 'Current' THEN `Value` END)  SUM(CASE WHEN `Period Type` = 'Last Week' THEN `Value` END)) / WHEN `Period Type` = 'Last Week' THEN `Value` END)
0 
To address the 4 week rolling average you could utilize the LAG window function however you'd need to have 28 different LAG functions (I'm assuming your date has a day grain and not a week grain here. If you have it by week this becomes easier and you can refer to the post @MarkSnodgrass mentioned) called in your beast mode which is a bit much to write. What I might also recommend is to have a 2 weeks ago, 3 weeks ago and 4 weeks ago offset you define and then just tweak your PoP beast mode (this is assuming you want weeks 03 vs 14 if not you could apply the same method for weeks 58):
(SUM(CASE WHEN `Period Type` IN ('Current', 'Last Week', '2 Weeks Ago', '3 Weeks Ago') THEN `Value` END)  SUM(CASE WHEN `Period Type` IN ('Last Week', '2 Weeks Ago', '3 Weeks Ago', '4 Weeks Ago') THEN `Value` END)) / WHEN `Period Type` IN ('Last Week', '2 Weeks Ago', '3 Weeks Ago', '4 Weeks Ago') THEN `Value` END)
0