Rank and Rank Increment/Decrement from selected week vs previous week - powerbi

Question

I have a table visual with branch, client and revenue information. The revenue is coming from a measure which is affected by the week selector slicer.
I need to show Rank for selected week and rank increment/decrement from selected week's rank vs previous week from selected week. In snapshot, Rank # and Rank are the requirements.
I tried to create rank with AllSelected function but it is always affected by week slicer and I cannot get previous week rank to compare and put Rank increment/decrement.
DAX I tried for Rank
This Week GP =
var _Total =
CALCULATE(
SUM(V_TopClients[revenue]),
DATESBETWEEN('Date'[date],[current_week_start_date], [current_week_end_date])
)
return _Total
Previous Week GP =
var _Total =
CALCULATE(
SUM(V_TopClients[revenue]),
DATESBETWEEN('Date'[date],[previous_week_start_date], [previous_week_end_date])
)
return _Total
Rank This Week =
RANKX(
ALLSELECTED(V_TopClients),
CALCULATE(SUM(V_TopClients[Revenue])
)
)
--Update: added dax for measures
Here I am able to get the rank for this week i.e. the week selected on slicer.
But unable to get rank for previous week.
I have v_TopClients that has weekly revenue information linking to dimCalendar, Date tables.

Answer 1

Here is another and probably the best option for you-
Step-1:
Create a new custom table based on your table "TopClient". The code is as below-
group_by_result_new =
VAR group_wise_revenue =
GROUPBY (
TopClients,
TopClients[CalendarWeekKey],
TopClients[clientID],
"gp_this_week", SUMX(CURRENTGROUP(), TopClients[GrossProfit])
)
RETURN
SELECTCOLUMNS (
group_wise_revenue,
"CalendarWeekKey", TopClients[CalendarWeekKey],
"clientID", TopClients[clientID],
"gp_this_week", [gp_this_week]
)
Step-2:
Create relation between table "DimCalendar" and "group_by_result_new" using the column "CalendarWeekKey"
Step-3:
Create a new column (remember it a column) as below-
gp_prev_week =
VAR client_id = group_by_result_new[clientID]
VAR calendar_key_this_week = group_by_result_new[CalendarWeekKey]
VAR end_date_this_week =
LOOKUPVALUE(
DimCalendar[WeekEndingDate],
DimCalendar[CalendarWeekKey], CONVERT(calendar_key_this_week,INTEGER)
)
VAR end_date_prev_week = CONVERT(end_date_this_week,DATETIME) - 7
VAR calendar_key_prev_week =
LOOKUPVALUE(
DimCalendar[CalendarWeekKey],
DimCalendar[WeekEndingDate] , end_date_prev_week
)
VAR gp_prev_week =
LOOKUPVALUE(
group_by_result_new[gp_this_week],
group_by_result_new[CalendarWeekKey],calendar_key_prev_week,
group_by_result_new[clientID], CONVERT(client_id,INTEGER)
)
RETURN gp_prev_week
Step-4:
Create a new column (remember it a column) for RANK this week as below-
rank_this_week =
RANKX (
FILTER (
group_by_result_new,
group_by_result_new[CalendarWeekKey] = EARLIER (group_by_result_new[CalendarWeekKey])
),
group_by_result_new[gp_this_week],
,
DESC
// ,
// DENSE
)
Step-5:
Create a new column (remember it a column) for RANK prev week as below-
rank_prev_week =
RANKX (
FILTER (
group_by_result_new,
group_by_result_new[CalendarWeekKey] = EARLIER (group_by_result_new[CalendarWeekKey])
),
group_by_result_new[gp_prev_week],
,
DESC
// ,
// DENSE
)
And that's all! This should also work same as my previous solution.
Cheers!!

Answer 2

In DAX, there are builtin function PREVIOUSMONTH, PREVIOUSQUARTER and PREVIOUSYEAR available. But as you are searching for weekly data comparison, you required your own date periods to calculate. I just can give you some idea as below-
First, crate 4 measure based on your slicer week/date selection.
Example:
current_week_end_date = SELECTEDVALUE(Dates[Date])
current_week_start_date = SELECTEDVALUE(Dates[Date]) - 7
previous_week_end_date = SELECTEDVALUE(Dates[Date]) - 8
previous_week_start_date = SELECTEDVALUE(Dates[Date]) - 15
Now, you need 2 separate measure to calculate this week and previous week total revenue. Example Measures are given below-
1.
this_week_revenue =
CALCULATE(
SUM(table[revenue]),
DATESBETWEEN(
'Dates'[Date],
[current_week_start_date],
[current_week_end_date]
)
)
2.
previous_week_revenue =
CALCULATE(
SUM(table[revenue]),
DATESBETWEEN(
'Dates'[Date],
[previous_week_start_date],
[previous_week_end_date]
)
)
Now you have both weekly value in your hand and you can compare measure "this_week_revenue " with measure "previous_week_revenue" to generate the directions indicators.
Hope this will help!
Below image is just for reference: