trawl_supIG: Evaluates the supIG trawl function
Description
Evaluates the supIG trawl function
Usage
trawl_supIG(x, delta, gamma)
Value
The supIG trawl function evaluated at x
Arguments
- x
the argument at which the supIG trawl function will be evaluated
- delta
the parameter \(\delta\) in the supIG trawl
- gamma
the parameter \(\gamma\) in the supIG trawl
Details
The trawl function is parametrised by the two parameters \(\delta
\geq 0\) and \(\gamma \geq 0\) as follows: $$gd(x) =
(1-2x\gamma^{-2})^{-1/2}\exp(\delta \gamma(1-(1-2x\gamma^{-2})^{1/2})),
\mbox{ for } x \le 0.$$ It is assumed that \(\delta\) and \(\gamma\) are
not simultaneously equal to zero.