27.6 Higher-level Interface
The functions described in the previous sections required the user to
supply pointers to the x and y arrays on each call. The
following functions are equivalent to the corresponding
gsl_interp functions but maintain a copy of this data in the
gsl_spline object. This removes the need to pass both xa
and ya as arguments on each evaluation. These functions are
defined in the header file gsl_spline.h.
— Function: gsl_spline *
gsl_spline_alloc (
const gsl_interp_type * T, size_t size)
— Function: int
gsl_spline_init (
gsl_spline * spline, const double xa[]
, const double ya[]
, size_t size)
— Function: void
gsl_spline_free (
gsl_spline * spline)
— Function: const char *
gsl_spline_name (
const gsl_spline * spline)
— Function: unsigned int
gsl_spline_min_size (
const gsl_spline * spline)
— Function: double
gsl_spline_eval (
const gsl_spline * spline, double x, gsl_interp_accel * acc)
— Function: int
gsl_spline_eval_e (
const gsl_spline * spline, double x, gsl_interp_accel * acc, double * y)
— Function: double
gsl_spline_eval_deriv (
const gsl_spline * spline, double x, gsl_interp_accel * acc)
— Function: int
gsl_spline_eval_deriv_e (
const gsl_spline * spline, double x, gsl_interp_accel * acc, double * d)
— Function: double
gsl_spline_eval_deriv2 (
const gsl_spline * spline, double x, gsl_interp_accel * acc)
— Function: int
gsl_spline_eval_deriv2_e (
const gsl_spline * spline, double x, gsl_interp_accel * acc, double * d2)
— Function: double
gsl_spline_eval_integ (
const gsl_spline * spline, double a, double b, gsl_interp_accel * acc)
— Function: int
gsl_spline_eval_integ_e (
const gsl_spline * spline, double a, double b, gsl_interp_accel * acc, double * result)