Use of LinRegSlope in Pivot Table

Question

Hi, I am new to OLAP and am having a hard time using the LinRegSlope function on a pivot table. I have a pivot table which pulls data from a server and has "store names" (rows) and "dates" (columns) as the dimensions. i.e.
[State].[City].[Store] and [year].[month].[date]. The measure being displayed is Revenue.
I would like to calculate the slope of the "Revenues", such that I could tell whether the revenue on a specifc store is going up or down through a deternimed period of time - only the period being displayed on the table (e.g. 10/10/2014
through 10/25/2014). I want the slope to appear as a column within the pivot table, and I want it to adjust to the number of stores and dates being displayed at the time (i.e. in the example above the slope should be calculated over a 16 day period because
there are 16 dates being displayed).
Any help on the syntax of the function would be greatly appreciated.
-Jose

Answer 1

Hi Josemp,
According to your description, you want to calculate the sales slope from 10/10/2014 to 10/25/2014. Right?
In Analysis Services, we can use LinRegSlope() function, specify Sales as Y axis value, Date as X axis value. Please refer to the query below:
WITH
      MEMBER Measures.[Slope] AS
       LINREGSLOPE(LASTPERIODS(16) AS
      [TimeSet],[Measures].[Internet Sales Amount] , RANK([Date].[Fiscal].CurrentMember, [TimeSet]))
SELECT
      {[Measures].[Slope]} ON COLUMNS,
       {[Date].[Date].&[20051010]:[Date].[Date].&[20051025]}ON ROWS
FROM
      [Adventure Works]
If you have any question, please feel free to ask.
Simon Hou
TechNet Community Support