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Hi,
Here is the kind of data set i have :
Date | Product | Price | Rank |
22/08/2017 | A | 95.50 | 1 |
22/08/2017 | B | 61.11 | 1 |
22/08/2017 | C | 65.74 | 1 |
21/08/2017 | A | 49.61 | 2 |
21/08/2017 | B | 60.61 | 2 |
21/08/2017 | C | 52.30 | 2 |
20/08/2017 | A | 75.13 | 3 |
20/08/2017 | B | 91.19 | 3 |
20/08/2017 | C | 85.00 | 3 |
16/08/2017 | A | 37.84 | 4 |
16/08/2017 | B | 99.51 | 4 |
16/08/2017 | C | 94.63 | 4 |
I 'm trying to compute the Day on Day price variation for each product. I managed to have something that works only if i have data on each days (but i will not have always daily datas, most of the time, nothing on weekend and sometimes one data points can miss on week days also)
Here is my column formula :
DoD Price= CALCULATE( ((AVERAGE(DataBase[Price]))-CALCULATE( AVERAGE(DataBase[Price]);DATEADD(DataBase[Date];-1;DAY); ALLEXCEPT(DataBase;DataBase[Date];DataBase[Product]))); ALLEXCEPT(DataBase;DataBase[Date];DataBase[Product]) )
I was thinking about using the "Rank" column wich is computed with this formula :
Rank = RANKX(DataBase;DataBase[Date];;DESC;Dense)
But i don't know if and how i can use to compute somthing like
CALCULATE ( AVERAGE(DataBase[Price]) - CALCULATE( AVERAGE(DataBase[Price]);RANK=RANK+1))
since the Rank+1 will always existe except for the oldest value.
Many thanks for your help
Regards
Pierre
Solved! Go to Solution.
Hi @pitucc,
My formula is a measure, if you direct use it as calculate column ,it may caused the issue.
In addition, if you need you can also use below formula: (calculate column version)
DoD diff = VAR previous_date = MAXX ( FILTER ( ALL ( 'Sample' ), [Date] < EARLIER ( [Date] ) ), [Date] ) RETURN IF ( previous_date <> 0, AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = EARLIER ( [Product] ) && [Date] = EARLIER ( [Date] ) ), [Price] ) - AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = EARLIER ( [Product] ) && [Date] = previous_date ), [Price] ), 0 )
Regards,
Xiaoxin Sheng
Hello,
I just wnated to close the topic, to compute a variation for anything alse than day on day, in the computation of "previous_avg" just replace "current_date" by " (current_date-XX) where XX is the lag you want for your variation.
For a WoW variation I have used the code below :
WoW Cheap = VAR current_Product =LASTNONBLANK ( DataBase[Name]; [Name] ) VAR current_date = MAX ( DataBase[ValuationDate] ) VAR current_avg = AVERAGEX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] = current_date ); [Cheap] ) VAR previous_avg = AVERAGEX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] = MAXX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] < (current_date-6) ); [ValuationDate] ) ); [Cheap] ) RETURN IF ( previous_avg <> 0; current_avg - previous_avg; 0 )
Many thanks once again for your help !
So, in the case of a missing date, do you want to calculate from the last date that there is?
For example:
22/08/2017, A, 95.50
24/08/2017, A, 95.60
So, on 23/08/2017 the price difference should be 0 and on 24/08/2017 the price difference should be .10 (not 95.60)?
exactly yes ! That's why i was thinking about using the "rank" column.
Hi @pitucc,
If you want to calculate day of day moving average diff, you can try to use below formula:
DoD Avg Diff = VAR current_Product =LASTNONBLANK ( 'Sample'[Product], [Product] ) VAR current_date = MAX ( 'Sample'[Date] ) VAR current_avg = AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = current_Product && [Date] = current_date ), [Price] ) VAR previous_avg = AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = current_Product && [Date] = MAXX ( FILTER ( ALL ( 'Sample' ), [Product] = current_Product && [Date] < current_date ), [Date] ) ), [Price] ) RETURN IF ( previous_avg <> 0, current_avg - previous_avg, 0 )
Regards,
Xiaoxin Sheng
Hello,
Thanks for your help but I have litterally copy pasted your formula but it don't have the same result as you do...
Any idea why ?
Furthermore, is the formula easely adaptable to compte a Month on month variation difference ?
Thanks
Hi @pitucc,
My formula is a measure, if you direct use it as calculate column ,it may caused the issue.
In addition, if you need you can also use below formula: (calculate column version)
DoD diff = VAR previous_date = MAXX ( FILTER ( ALL ( 'Sample' ), [Date] < EARLIER ( [Date] ) ), [Date] ) RETURN IF ( previous_date <> 0, AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = EARLIER ( [Product] ) && [Date] = EARLIER ( [Date] ) ), [Price] ) - AVERAGEX ( FILTER ( ALL ( 'Sample' ), [Product] = EARLIER ( [Product] ) && [Date] = previous_date ), [Price] ), 0 )
Regards,
Xiaoxin Sheng
That's perfect many thanks !
Is it easely adaptable for MoM variation or 21days on 21 days variation ?
Oh and one last question, what is difference between using your solution as column formula or as a measure ?
Thanks
Hello,
I just wnated to close the topic, to compute a variation for anything alse than day on day, in the computation of "previous_avg" just replace "current_date" by " (current_date-XX) where XX is the lag you want for your variation.
For a WoW variation I have used the code below :
WoW Cheap = VAR current_Product =LASTNONBLANK ( DataBase[Name]; [Name] ) VAR current_date = MAX ( DataBase[ValuationDate] ) VAR current_avg = AVERAGEX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] = current_date ); [Cheap] ) VAR previous_avg = AVERAGEX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] = MAXX ( FILTER ( ALL ( DataBase ); [Name] = current_Product && [ValuationDate] < (current_date-6) ); [ValuationDate] ) ); [Cheap] ) RETURN IF ( previous_avg <> 0; current_avg - previous_avg; 0 )
Many thanks once again for your help !
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