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Operator Type: 

Operator Scope of Action: 

Operator Purpose: 

Operator First Added: 

Operator Altered: 

 Function   [other Function type actions]

 Group   [operators of similar scope]

 Mathematical   [other Mathematical operators]




This computes the arithmetic mean of a value in a group. See avg_if() for a for a related conditional operator.

group describes the notes to be examined and may be any of {children,descendants,siblings,ancestors,all}.

value may be any valid expression, but will usually be a reference to an attribute; short form Boolean attribute expressions are acceptable.

For example:


returns the average price of all the items in Catalog.

A Tinderbox Reference File : Actions & Rules : Operators : Full Operator List : avg(group,value)