Re: [Help-gsl] monotone spline

[Rhys Ulerich]

> I wonder If it is possile
> to impose a monotone condition on the overall function
> (in order not to result in oscillations, due to
> scattering data points).

Offhand, I'm not aware of how to directly impose a monotonicity
condition using B-splines.  Of course, you could always choose a basis
with fewer degrees of freedom than your number of sample points and
then perform a least squares fit.  You may still get some oscillations
for oscillatory data, but they should be much slower ones.  Tune as
appropriate for your application.

- Rhys