[Gretl-devel] Re: Another extra.gfn candidate?
On Mon, 20 May 2019, Riccardo (Jack) Lucchetti wrote:
Sorry for the bombardment: I just realised that, much to my surprise,
not only
we don't have a numerical root-finding function in hansl; it seems we don't
have one in libgretl either!
So I put together a quick hansl prototype for the crudest algorithm there is
(the bisection method). It's reportd below, with a few examples. The question
is very much similar to the one in the other thread: shall we put this into
extra.gfn, or add this (hopefully, in a refined form) to libgretl and
eventually expose a user-level function?
The prototype seems to work very nicely. I've added a C translation as
a hansl built-in under the name fzero (might as well use the matlab
name, I guess). Not yet documented.
Allin