The avg() Function

Syntax

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number avg(node-set)

Description

Function avg() returns the arithmetic average of the result of converting the string-values of each node in the argument node-set to a number. The sum is computed with sum(), and divided with div by the value computed with count(). If the parameter is an empty node-set, or if any of the nodes evaluate to NaN, the return value is NaN.

Example

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<xforms:model> <xforms:instance xmlns:ex="http://example.org">>    <ex:root>     <ex:value>2</ex:value>     <ex:value>6</ex:value>    </ex:root>   </xforms:instance> </xforms:model> ... <xforms:group>   <xforms:output value="avg(ex:value)">    <xforms:label>Average : </xforms:label>   </xforms:output> </xforms:group>

The above example will return 4.

Specification

Link to the XForms specification: the avg() function.