Adjusting Week Grouping Logic in Power BI Matrix Table

[Gemni]

hi! im new here, can someone pls help me with this? thank you!

i have a matrix table

rows: nr tagging[new region], customer[customer name]

columns: productivity[weekperiod]

values: productivity[actual]

currently this is the output of my columns in the table:

Wk - 1 Mon-Wed | Wk - 1 Thu-Sat | Wk -2 Mon-Wed | Wk -2 Thu-Sat

First column is always "Wk1 Mon-Wed", even if the first group of the first week of the month falls under the group of "Wk-1 Thu-Sat". How can I correct this? if week 1 starts on a tuesday or wednesday or thursday, then the first column should be Wk-1 Thu-Sat, if week 1 starts on a sat or sun or mon, then the first column should be Wk-1 Mon-Wed. The group should be complete (mon-wed) and (thu-sat). let’s say in the month of Sep 2024, week 5 is only until Monday, then there shouldn’t be Wk-5 Mon-Wed since Tues and Wed falls on the next month.

In June 2024, day 1 started on a Saturday, so the first column should be "Wk-1 Mon-Wed".

WeekPeriod = VAR WeekNum = “Wk - “ & Productivity[Week_5] VAR DayGroup = Productivity[Weekday Group] RETURN IF(ISBLANK(DayGroup), BLANK(), WeekNum & “ “ & DayGroup) Week_5 = VAR Num = INT ((Productivity[FORM ANSWER DATE] • [Day]-1)/7)+1 RETURN IF ( Num > 5, 5, Num )

Weekday Group = SWITCH ( TRUE () , Productivity [Weekday] >= 1 && Productivity[Weekday] <= 3, "Mon-Wed" , Productivity [Weekday] >= 4 && Productivity[Weekday], <= 6, "Thu-Sat", BLANK())

[lbendlin]

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[Gemni]

Thank you for the response!

To clarify my issue, here's some sample data that reflects the problem I'm encountering with my matrix table:

Rows: NAME

Columns: WeekPeriod

Values: Actual

Filtered by the month of October 

NAME	Week 1 Mon-Wed	Week 1 Thu-Sat	Week 2 Mon-Wed	Week 2 Thu-Sat	Week 3 Mon-Wed	Week 3 Thu-Sat
Brix	1	1	1	1	1	1
Zoey	1		1	1		1

- October 2024 starts on a Tuesday, so the first column should be "Week 1 Thu-Sat" because the first three days of the week (Mon-Wed) don't form a complete group.

- Only display complete groups of Mon-Wed and Thu-Sat. For example, if a week only has a part of Mon-Wed or Thu-Sat that spills into the next month, it shouldn't be displayed in the header.

here's more sample filtered by the month of April:

NAME	Week 1 Mon-Wed	Week 1 Thu-Sat	Week 2 Mon-Wed	Week 2 Thu-Sat	Week 3 Mon-Wed	Week 3 Thu-Sat	Week 4 Mon-Wed	Week 4 Thu-Sat	Week 5 Mon-Wed
Brix	1	1	1	1	1	1	1	1
Zoey	1		1	1		1	1	1	1

- this April table should only have 8 columns since the last group of Mon-Wed isn't complete April 29-30 as Monday and Tuesday, because Wed falls on the next month.

Please let me know if this helps or if you need further clarification. Thank you

[lbendlin · Accepted solution]

All of this is immutable.  There is no need to calculate this with Power Query or DAX.  Use an externally sourced calendar table that for each day indicated which week sub group it belongs to.