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I am new to Power Query and I'm trying to create a query template that applies a 3 moving average to the volume and sales for the next 3 weeks grouped by weekday for each product.
My input table looks like this.
INPUT | ||||
SPAN | 07/01/2022 | Fri | 345 | 589 |
SPAN | 07/08/2022 | Fri | 453 | 124 |
SPAN | 07/08/2022 | Fri | 453 | 124 |
SPAN | 07/15/2022 | Fri | 789 | 793 |
SPAN | 07/22/2022 | Fri | 564 | 464 |
SPAN | 07/29/2022 | Fri | 645 | 548 |
PC | 07/01/2022 | Fri | 689 | 645 |
PC | 07/08/2022 | Fri | 564 | 646 |
PC | 07/08/2022 | Fri | 646 | 754 |
PC | 07/15/2022 | Fri | 564 | 744 |
PC | 07/22/2022 | Fri | 549 | 646 |
PC | 07/29/2022 | Fri | 979 | 319 |
SPAN | 07/06/2022 | Wed | 235 | 542 |
SPAN | 07/13/2022 | Wed | 234 | 589 |
SPAN | 07/20/2022 | Wed | 354 | 545 |
SPAN | 07/27/2022 | Wed | 545 | 435 |
PC | 07/06/2022 | Wed | 656 | 646 |
PC | 07/13/2022 | Wed | 968 | 346 |
PC | 07/13/2022 | Wed | 574 | 731 |
PC | 07/20/2022 | Wed | 878 | 464 |
PC | 07/27/2022 | Wed | 579 | 643 |
Note: I didn't include all the data but there is data for each weekday (Mon, Tue, Wed, Thu, Fri, Sat, Sun) and there are more products.
Below are the steps that I've been doing:
Sort the data first by call type and then by weekday.
Then grouped the rows and create an index for each product-weekday with the next code:
#"Grouped Rows" = Table.Group(#"Sorted Rows", {"product", "weekday"}, {{"Index", each
Table.AddIndexColumn(_,"Index", 1,1), type table}}),
#"Expanded Index" = Table.ExpandTableColumn(#"Grouped Rows", "Index", {"date", "volume", "sales",
"Index",} , {"Index.date", "Index.volume", "Index.sales", "Index.Index",}
Then I apply the 3 moving Average to the volume:
step1 = Table.AddColumn(#"Expanded Index", "Average_vol", each if [Index.Index] > 2 then List.Average(List.Range(#"Expanded Index"[Index.volume], _[Index.Index] -3, 3)) else null, type number)
So now I have this:
SPAN | 07/06/2022 | Wed | 235 | 542 | 1 | Null |
SPAN | 07/13/2022 | Wed | 234 | 589 | 2 | Null |
SPAN | 07/20/2022 | Wed | 354 | 545 | 3 | 558.666667 |
SPAN | 07/27/2022 | Wed | 545 | 435 | 4 | 523 |
SPAN | 07/01/2022 | Fri | 345 | 589 | 1 | Null |
SPAN | 07/08/2022 | Fri | 453 | 124 | 2 | Null |
SPAN | 07/08/2022 | Fri | 453 | 124 | 3 | 279 |
SPAN | 07/15/2022 | Fri | 789 | 793 | 4 | 347 |
SPAN | 07/22/2022 | Fri | 564 | 464 | 5 | 460.333333 |
SPAN | 07/29/2022 | Fri | 645 | 548 | 6 | 601.666667 |
PC | 07/06/2022 | Wed | 656 | 646 | 1 | Null |
PC | 07/13/2022 | Wed | 968 | 346 | 2 | Null |
PC | 07/13/2022 | Wed | 574 | 731 | 3 | 574.333333 |
PC | 07/20/2022 | Wed | 878 | 464 | 4 | 513.666667 |
PC | 07/27/2022 | Wed | 579 | 643 | 5 | 612.666667 |
PC | 07/01/2022 | Fri | 689 | 645 | 1 | Null |
PC | 07/08/2022 | Fri | 564 | 646 | 2 | Null |
PC | 07/08/2022 | Fri | 646 | 754 | 3 | 681.666667 |
PC | 07/15/2022 | Fri | 564 | 744 | 4 | 714.666667 |
PC | 07/22/2022 | Fri | 549 | 646 | 5 | 714.666667 |
PC | 07/29/2022 | Fri | 979 | 319 | 6 | 569.666667 |
the highlighted cells are the moving average expected for the next week.
It's working but now I need to include the numbers in red for the "next 2-week average" and the 3rd
So now I'm stuck on that step and I need to create the template.
Do you know how can I apply the moving average for the next 2 weeks including the calculated numbers for the next week(red numbers)?
Hi @donpep0
What do you currently have for the next 2nd and 3rd week? If you have null values in them, you can possibly use Fill Down feature. After that, transform the column to show null for index 1 and 2.
I'm not sure how to tell which week is expected to be the current week thus which values should be expected for next weeks. Can you explain the logic why you highlight those values? Is it because the latest week in the table is the week that 07/29/2022 lies in? If so, do we need to add new rows for those "next dates"?
Best Regards,
Community Support Team _ Jing
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