Returns the group delay of the argument. Group delay is defined as:
\[ \frac{d}{dx}\left(\text{phase}\left(y\right)\right)\cdot \frac{1}{2\pi} \]
where ???MATH???y???MATH??? is the supplied vector and ???MATH???x???MATH??? is its reference. The GroupDelay function expects the result of an AC analysis where ???MATH???y???MATH??? is a voltage or current and its reference is frequency.
This function will yield an error if its argument is complex and has no reference.
| Number | Type | Compulsory | Default | Description |
| 1 | real/complex array | Yes | Vector |
Return type: real array
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