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Calculates the average of the argument with respect to its reference as defined by:
\[ y = \int_{0}^{t}\frac{x}{t}dt \]where $x$ is the argument and $t$ is the reference of $x$. See Vector References for details.
The function uses simple trapezoidal integration.
An error will occur if the argument supplied has no reference.
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | real array | Yes | 
 | vector | 
Return type: real array
| 
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