natural_spline natural_spline_C spline_eval spline_eval_C

void spline_eval ( int  method, valarray< double >  u, valarray< double > &  v, const valarray< double > &  x, const valarray< double > &  y, const valarray< double > &  b, const valarray< double > &  c, const valarray< double > &  d  )