To create a accumulated/YTD and LYTD for weekly basis.

[Anonymous]

Hi Everyone,

Can someone help me to create a accumulated/YTD for weekly basis. Below is the measure I am created, but not given as excepted.

For example, if I am selecting 202147 as a week, its should give data between 202136 to 202047 (My fisical year starts from Sep thats why we considering week 36 as 1st week).
I need to calculate LYTD which would consider 202036 to 202047.

accTest =

Var _currentweek = SELECTEDVALUE('Date'[Week])

Var _previousWeek = _currentweek-100

RETURN

TOTALYTD (

SUM ( FACT_Table[Value EUR] ),

FILTER('Date','Date'[Week] = _previousWeek),

ALL('Date'),

"08/31"

)

Thanks in advance.

[amitchandak]

@Anonymous , Create a date/ week table with week, year, year week and year week rank

New columns in date /week tables 

new columns
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)
Week = WEEKNUM([Date],2)
year Week = if('Date'[Week Number]<10,'Date'[Year]*10 & 'Date'[Week Number],'Date'[Year]&'Date'[Week Number])
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))
Last year Week= CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=(max('Date'[Week Rank]) -52)))
or
Last year Week= CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]=(max('Date'[Week Rank]) -53)))
or
This year week= CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Year]=max('Date'[Year]) && 'Date'[Week] = Max('Date'[Week]) ))
Last year same week = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Year]=max('Date'[Year])-1 && 'Date'[Week] = Max('Date'[Week])))

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-Last-Week/ba-p/1051123
https://www.youtube.com/watch?v=pnAesWxYgJ8