4D Doc Center : Variance

4D v12.4

Variance


Variance ( series ) -> Function result

Parameter	Type	Description
series	Field	Data for which to return the variance
Function result	Real	Variance of series

Description

Variance returns the variance for series. If series is an indexed field, the index is used to find the variance.

Example

The following example is an object method for the variable var. The object method assigns the sum of squares for a data series to var:

var:=Variance(Students]Grades)

The following method is called to print the records in the selection and to activate break processing:

 ALL RECORDS([Students])

 ORDER BY([Students];[Students]Class;>)

 BREAK LEVEL(1)

 ACCUMULATE([Students]Grades)

 OUTPUT FORM([Students];"PrintForm")

 PRINT SELECTION([Students])

Note: The parameter to the BREAK LEVEL command should be equal to the number of breaks in your report. For more information about break processing, refer to the chapter Printing.