[Gretl-devel] Re: hdprod() extension

On Mon, 25 Jan 2021, Riccardo (Jack) Lucchetti wrote: > On Mon, 25 Jan 2021, Sven Schreiber wrote: > >> Sounds good to me. Does this operation have a name in algebra? > > To the best of my knowledge, it's a variant of the Khatri-Rao product (as > mentioned in the help files). I've just learned that Wikipedia also calls > it the "face-splitting" product. OK; I just pushed to git the modifications needed to gretl_matrix.c to handle the case when B is NULL. Seems to work ok. However, this is not user-visible yet because I'm not sure of how to handle a hansl function whose signature would be the one I proposed, that is: two matrix arguments, with the second one optional. Allin: I mucked about a little with geneval.c, but I was afraid I was mishandling things, so I'd rather wait for a hint from you. Thanks!