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      7avg
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      7avg

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      Article summary

      Returns the mean of the previous seven rows

      Takes the previous 7 rows, adds them up, and divides by 7.

      The first 7 rows will return NULL

      Purpose

      Use this function to: 

      • Calculate moving 7 day average
      • Smooth out peaks and troughs in data series

      Calculation

      7avg = Sum([x-1]:[x-7]) / 7

Row(X-1) = previous row

Row(X-7) = seventh previous row

sum([X-1]:[X-7]) = sum of previous 7 rows in result set


      Sample Result

      Parameters

      ParameterDescription
      DimensionsDiscrete field(s).    All fields must come from the same table.
      NameName to be displayed as Column Header in result grid
      Measure

      The field to be used in the post-function calculation.

      • Must be numeric if Function is anything other than COUNT.
      • Must come from same table as DIMENSIONS.
      • Supports Discrete or Continuous DataTypes.
      FunctionCOUNT / SUM / AVG / MIN / MAX / STDEV
      Post7avg
      Value

      Optional.   Filter to apply when evaluating FUNCTION.   Only records in the Filter Recordset will be included in the Function and Post-Function calculations.

      Must come from same table as DIMENSION/MEASURE or be linked to the Dimension table.

      Axis0 / 1.    Y-Axis to use when plotting graph.     Default = 0
      PlotY / N.   Specifies whether measure’s output column should be plotted on graph.  Default = Y
      ResolveOptional.   Resolve level for the measure.   If blank, Resolve = Dimension Table
      Series Type

      Default / Bar / Stacked Bar / Line / Spline / RangeLow / RangeHigh / CSLow / CSHigh / CSOpen / CSClose

      Determines the graph style for the measure.

      PopupDefault / None / Extended
      Prefix$ / £ / E / %

      Usage Notes

      Use 7day to smooth out a data series and help identify long-term trends.

      See Post Processing - MovingAverage for more rolling average options.

      Example

      • Example use: Running 7 day average for sales
      • e.g Running 7 day average Total of sales. Adds the last 7 days sales figures and divides by 7 to get the mean.

      NOTE: Measure 1 is included purely for illustration. It is not necessary to include this measure for the calculation to work.

      Dimension:  [transactions].[date]

      Measure 1

      • Name: = Sum
      • Measure:  = transactions.castprice
      • Function: = Sum
      • Post: =
      • Value: =
      • Axis: =0
      • Plot:=Y
      • Resolve:=
      • Series Type:=Bar
      • Popup:=Default
      • Prefix:=

      Measure 2

      • Name: = Rolling 7 day average
      • Measure:  = transactions.castprice
      • Function: = Sum
      • Post: = 7avg
      • Value: =
      • Axis: =0
      • Plot:=Y
      • Resolve:=
      • Series Type:=Line
      • Popup:=Default
      • Prefix:=



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