delta(percent)

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PostFunction: [delta%]

Returns the change between rows as a percentage of the total change between the first and last rows in the result-table.

Calculates the difference between current row and previous row (deltaX)
Calculates the total change between the last row in the data set and the first row in the data set (TotalChange)
Divides the difference for current row by the total change (deltaX / TotalChange)

Purpose

Use this function to:

See change as a percentage of overall change from first row to last row
Calculate percentage change contribution for each reporting per

Calculation

Delta% = Delta(X) / TotalChange

Row(N) = "value for last row in resultset"
Row(0) = "value for first row in resultset"
Row(X) = "value for current row"
Row(X-1) = "value for previous row"
Delta(X) = Row(X) - Row(X-1)
TotalChange = Row(N) - Row(0)

Sample Result

deltapercent_sample

Parameters

Input	Description
Dimensions	Discrete field(s). All fields must come from the same table.
Name	Name 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.
Function	COUNT / SUM / AVG / MIN / MAX / STDEV
Post	delta
*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.
*Axis*	0 / 1. Y-Axis to use when plotting graph. Default = 0
*Plot*	Y / N. Specifies whether measure’s output column should be plotted on graph. Default = Y
*Resolve*	Optional. 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.
*Popup*	Default / None / Extended
*Prefix*	$ / £ / E / %

Usage Notes

Calculates the difference between current row and previous row (deltaX)
Calculates the total change between the last row in the data set and the first row in the data set (TotalChange)
Divides the difference for current row by the total change (deltaX / TotalChange)

Example

Calculate monthly sales growth as a percentage of total change over the period.

Note

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

Dimension(s):	[Transactions].[YearMonth]
Measure 1	Name: =Sales This Month Measure: = transactions.castprice Function: =sum Post: = Value: =	Axis: =0 Plot:=Y Resolve:= Series Type:=Default Popup:=Default Prefix:=
Measure 2	Name: =Monthly Change Measure: =transactions.castprice Function: =sum Post: =delta% Value: =	Axis: =0 Plot:=Y Resolve:= Series Type:=Default Popup:=Default Prefix:=

deltapercent_example1

deltapercent_example2

Here we can see that the period [200009 to 200010] had 17.83% of the total growth over the period.