Is this <https://github.com/ampl/gsl/tree/master/bspline> the relevant section of the github repository you are referring to?
Am Mi., 8. März 2023 um 06:21 Uhr schrieb Patrick Alken <al...@colorado.edu >: > Its also worth mentioning that there has been a substantial overhaul to > the B-splines routines since v2.7. The new routines are on the git > repository, along with documentation. If you have the ability to clone > the git and build the documentation from there I highly encourage it. > There are many example programs in the git documentation which are not > in the 2.7 docs which may help you. > > On 3/7/23 22:07, Rhys Ulerich wrote: > > This time remembering to CC the mailing list... > > > > On Tue, Mar 7, 2023, 9:57 PM Rhys Ulerich <rhys.uler...@gmail.com> > wrote: > > > >> On Tue, Mar 7, 2023, 5:11 PM Simon Wiesheier <simon.wieshe...@gmail.com > > > >> wrote: > >> > >>> After reading the manual, it is not clear to me how GNU internally > >>> constructs the knot vector. > >>> There are the functions, > >>> gsl_bspline_knots > >>> gsl_bspline_knots_uniform, > >>> that create the knot vector based on given breakpoints. > >>> > >> I encourage you to initialize a cubic workspace (k=4, pick nbreak) then > to > >> use gsl_bspline_knots_uniform to have the GSL construct the knot vector > for > >> you given some [a, b]. You will be able to observe the multiplicity of > the > >> various knots in the resulting w->knots. The multiplicity is a > consequence > >> of the chosen k meaning that if you opted for quadratic or quintic k you > >> will see a different knot multiplicity. Play around a bit. > >> > >> You may (or may not) find the routines at > >> https://github.com/RhysU/suzerain/blob/master/suzerain/bspline.h to be > >> useful worked examples. Those include forming linear combinations of the > >> basis. > >> > >> - Rhys > >> > >
