4.1.3.2.10 WeightedSampleVariance

Prototype:

function WeightedSampleVariance (TableOrLayer :TObjectWrapper; const AttributeName :string; const WeightAttribute :string; const NullAsZero :boolean) : extended;

Description:

Calculates weighted variance of a specific attribute

Syntax:

variable := WeightedSampleVariance (tab, AttributeName, WeightAttribute, NullAsZero);

Part

Description

variable

A variable declared as type of extended

tab

Table containing source variables

AttributeName

Attribute of source table containing data to enter calculations

WeightAttribute

Attribute of source table containing weights

NullAsZero

Boolean expression defining whether to exclude null (false) entries or replace nulls with zeros (true)

Return value:

Weighted variance