> The other one in that graph *might* be close to the one on wiki? > http://en.wikipedia.org/wiki/Monotone_cubic_interpolation > > However, I would prefer to have a GSL implementation.
I suspect a GSL implementation would look enough like http://bzr.savannah.gnu.org/lh/gsl/trunk/annotate/head:/interpolation/cspline.c that those data structures could be used as a fruitful starting point. - Rhys
