> >>>> ...linear algebra ... > >>> ... matrices and vectors . > >> ...Especially if some GIST or similar index could efficiently search > >> for vectors "close" to other vectors... > > > > Hmm. If I get some more interest on this list (I need just one LAPACK > > / BLAS hacker...), I will apply for a pgFoundry project and appoint > > myself head of the peanut gallery... > > I think you should start one. I'd be happy to help.
OK. You are on. I think designing an interface is the first step, and I am inclined to use matlab syntax plus cool things I wish they had (convolution matrices, recycling, etc). > I'm rather proficient in C; somewhat literate about postgres' GIST > stuff (I think a couple of my bugfix patches were accepted in postgis); Nifty! I am having trouble bending my head around how we can fit 10K by 10K matrices into Datums, but if you have worked with PostGIS then a lot of those big geographic fields might help. > and deal with a big database doing lots of similarity-based searches (a > 6'2" guy with light brown hair being similar to a 6'1" guy with dark > blond hair) - and am experimenting with modeling some of the data as > vectors in postgres. Well, I bet a good linear algebra library would help. A lot. :) ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org/