[pdf-devel] pdf_function.c

[Hardy Falk]

Hi ,
cubic spline interpolation ( 1D case ) can be done in 
about 60 lines of C code implementing 

double pdf_eval_spline( double x, int nsamples,
        const double y[],
        const double y1[] ) 

void pdf_solve_spline(int nsamples, 
        const double y[], 
        double y1[] ) ;

http://mathworld.wolfram.com/CubicSpline.html

I have finished an implementation of type 2 functions.