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let () = Error.init ()
type t
type accel
type interp_type =
| LINEAR
| POLYNOMIAL
| CSPLINE
| CSPLINE_PERIODIC
| AKIMA
| AKIMA_PERIODIC
external _alloc : interp_type -> int -> t = "ml_gsl_interp_alloc"
external _free : t -> unit = "ml_gsl_interp_free"
let make t s =
let i = _alloc t s in
Gc.finalise _free i;
i
external _init : t -> float array -> float array -> int -> unit
= "ml_gsl_interp_init"
let init i x y =
let lx = Array.length x in
let ly = Array.length y in
if lx <> ly then invalid_arg "Interp: init";
_init i x y lx
external name : t -> string = "ml_gsl_interp_name"
external min_size : t -> int = "ml_gsl_interp_min_size"
external _accel_alloc : unit -> accel = "ml_gsl_interp_accel_alloc"
external _accel_free : accel -> unit = "ml_gsl_interp_accel_free"
let make_accel () =
let a = _accel_alloc () in
Gc.finalise _accel_free a;
a
external i_eval : t -> float array -> float array -> float -> accel -> float
= "ml_gsl_interp_eval"
external i_eval_deriv :
t -> float array -> float array -> float -> accel -> float
= "ml_gsl_interp_eval_deriv"
external i_eval_deriv2 :
t -> float array -> float array -> float -> accel -> float
= "ml_gsl_interp_eval_deriv2"
external i_eval_integ :
t -> float array -> float array -> float -> float -> accel -> float
= "ml_gsl_interp_eval_integ_bc" "ml_gsl_interp_eval_integ"
type interp = {
interp : t;
accel : accel;
xa : float array;
ya : float array;
size : int;
i_type : interp_type;
}
let make_interp i_type x y =
let len = Array.length x in
let ly = Array.length y in
if len <> ly then invalid_arg "Interp.make";
let t = _alloc i_type len in
let a = _accel_alloc () in
let v = { interp = t; accel = a; xa = x; ya = y; size = len; i_type } in
Gc.finalise
(fun v ->
_free v.interp;
_accel_free v.accel)
v;
init t x y;
v
let eval interp x = i_eval interp.interp interp.xa interp.ya x interp.accel
external eval_array : interp -> float array -> float array -> unit
= "ml_gsl_interp_eval_array"
let eval_deriv interp x =
i_eval_deriv interp.interp interp.xa interp.ya x interp.accel
let eval_deriv2 interp x =
i_eval_deriv2 interp.interp interp.xa interp.ya x interp.accel
let eval_integ interp a b =
i_eval_integ interp.interp interp.xa interp.ya a b interp.accel