[Help-gsl] Spline coefficients

[Paolo Franzetti]

Hello all,

For the purposes of a piece of software I am writing I have
to perform a "linear least squares fit to data using cubic B-spline
basis functions with uniform breakpoints" which is exactly what is done
in the example code:

http://www.gnu.org/software/gsl/manual/html_node/Example-programs-for-B_002dsplines.html

This code works really fine for me, but I have a further problem.
I need to store the fit results in an output file to be used by other programs
to recover the best-fitting curve.

Which is the best way to to this ?
How many coefficients I have to store and how is the best way to reload
them in a new program ?

Thanks in advance for any help,
Paolo