zdelta

Article summary

Did you find this summary helpful?

Thank you for your feedback

PostFunction: [zdelta]

i.e., Subtracts the previous row from the current row.

First row is 0.00

Note: to have first row returned as null, see PostFunction: delta

Use this function to:

zdelta = Row(X) - Row(X-1)

Row(X) = "value for current row"
Row(X-1) = "value for previous row"
zdelta= Row(X) - Row(X-1)

zdelta_sample

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
PostFunction	zdelta
*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 / %

The order of the dimensions is important as this will affect the inter-row calculations. Sort by Label or Value, Ascending or Descending.

Can be used with multiple dimensions as calculates difference between each row.

Calculate difference in sales from one month to the next (Month on Previous Month)

e.g Sales difference by month

Table: Transactions

Dimension: [Transactions].[YearMonth]

Measure: [Transactions].[CastPrice], SUM, zdelta

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:=Line Popup:=Default Prefix:=
Measure 2	Name: =Monthly Change Measure: =transactions.castprice Function: =sum Post: =zdelta Value: =	Axis: =0 Plot:=Y Resolve:= Series Type:=Bar Popup:=Default Prefix:=