Top 6 rolling weekly date sorted by most recent

[CMSGuy]

I have a chart that has a total number of "incidents" and is stacked by type.  The manager wants to see this sorted by week number, but also wants to see the past six weeks.  Can someone direct me on what I need to do here?  Thanks

[amitchandak · Accepted solution]

@CMSGuy ,

make sure you have column Year Week or week start date in your table and create a rank on that

Have these new columns in Date Table, Week Rank is Important in Date/Week Table
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
WeekDay = weekday([Date],2)
Have these new columns in Date Table, Week Rank is Important in Date/Week Table

Week Rank = RANKX('Date','Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX('Date','Date'[Year Week],,ASC,Dense) //YYYYWW format

Then you can have measure like

Last 6 weeks =
var _max = maxx(allselected(Date), Date[Week Rank]) // Or// Maxx(filter(Date, Date[Date] = Today()), Date[Week Rank])
var _min = _max -5
return
calculate([Meausre], filter(Date, 'Date'[Week Rank] >=_min && 'Date'[Week Rank] <=_max))

This measure will work with not filter or when you have range greater than 6 week .

In comment check code for today 

If you want to select a date and then want 6 week refer

Need of an Independent Date Table:https://www.youtube.com/watch?v=44fGGmg9fHI

Power BI — Week on Week and WTD
https://medium.com/@amitchandak.1978/power-bi-wtd-questions-time-intelligence-4-5-98c30fab69d3
https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-La...
https://www.youtube.com/watch?v=pnAesWxYgJ8

[CMSGuy]

For this part, what is [Measure]?

return
calculate([Meausre], filter(Date, 'Date'[Week Rank] >=_min && 'Date'[Week Rank] <=_max))