xquery-aggregate-functions-avg

          fn:avg($arg as xdt:anyAtomicType*) as xdt:anyAtomicType?
        

Returns the average of a sequence of numbers.

$arg

The sequence of atomic values whose average is computed.

All the types of the atomized values that are passed to

have to be a subtype of exactly

one of the three built-in numeric base types or xdt:untypedAtomic. They cannot be a mixture.

Values of type xdt:untypedAtomic are treated as xs:double. The result of

receives the

base type of the passed in types, such as xs:double in the case of xdt:untypedAtomic.

If the input is statically empty, empty is implied and a static error is raised.

The

function returns the average of the numbers computed. For example:

$arg

$arg

If

$arg

is an empty sequence, the empty sequence is returned.

If an xdt:untypedAtomic value cannot be cast to xs:double, the value is disregarded in the input

sequence,

$arg.

In all other cases, the function returns a static error.

fn:avg($arg as xdt:anyAtomicType*) as xdt:anyAtomicType?