How to show values x-1 based on a filtered value

[NiekHacquebord]

Dears,

I am trying to create a dashboard as in the below picture. Bit of background info: the values in the coloured boxes are linked to a week number, and obviously they change when the slicer of the lefthand side is adjusted. The same goes for the value "46" in the top right corner. 

What I would like to add is the following: to make a comparison to the values of the previous week, I would like to add the values of the previous week as well (so essentially x-1 in which 'x' is the value indicated in the slicer: in case of the screenshot it would be week 45). I haven't figured out how to make this work, however. Could one of you help me with that? Thanks a lot!

[amitchandak · Accepted solution]

@NiekHacquebord , refer if my blogs or vieo can help

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

You need

new columns in date table 
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX(all('Date'),'Date'[Year Week],,ASC,Dense) //YYYYWW format

measures
This Week = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])))
Last Week = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=max('Date'[Week Rank])-1))

[NiekHacquebord]

Hi amitchandak,

I didnt have the time to work on this for a while but I managed to get some time for it today, and after implementing your solution I am very happy with the result. Thanks a lor for your help!

Regards,

Niek

[NiekHacquebord]

Hi amitchandak,

I didnt have the time to work on this for a while but I managed to get some time for it today, and after implementing your solution I am very happy with the result. Thanks a lor for your help!

Regards,

Niek