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/* ocamlgsl - OCaml interface to GSL */
/* Copyright () 2002 - Olivier Andrieu */
/* distributed under the terms of the GPL version 2 */
#include <gsl/gsl_multifit_nlin.h>
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/fail.h>
#include "wrappers.h"
#include "mlgsl_fun.h"
#include "mlgsl_vector_double.h"
#include "mlgsl_matrix_double.h"
/* solvers */
static const gsl_multifit_fdfsolver_type *fdfsolver_of_value(value t)
{
const gsl_multifit_fdfsolver_type *solver_types[] = {
gsl_multifit_fdfsolver_lmsder,
gsl_multifit_fdfsolver_lmder, } ;
return solver_types[Int_val(t)];
}
value ml_gsl_multifit_fdfsolver_alloc(value type, value n, value p)
{
gsl_multifit_fdfsolver *S;
struct callback_params *params;
value res;
S=gsl_multifit_fdfsolver_alloc(fdfsolver_of_value(type),
Int_val(n), Int_val(p));
params=stat_alloc(sizeof(*params));
res=alloc_small(2, Abstract_tag);
Field(res, 0) = (value)S;
Field(res, 1) = (value)params;
params->gslfun.mffdf.f = &gsl_multifit_callback_f;
params->gslfun.mffdf.df = &gsl_multifit_callback_df;
params->gslfun.mffdf.fdf = &gsl_multifit_callback_fdf;
params->gslfun.mffdf.n = Int_val(n);
params->gslfun.mffdf.p = Int_val(p);
params->gslfun.mffdf.params = params;
params->closure = Val_unit;
params->dbl = Val_unit;
register_global_root(&(params->closure));
return res;
}
#define FDFSOLVER_VAL(v) ((gsl_multifit_fdfsolver *)(Field(v, 0)))
#define CALLBACKPARAMS_VAL(v) ((struct callback_params *)(Field(v, 1)))
value ml_gsl_multifit_fdfsolver_set(value S, value fun, value x)
{
struct callback_params *p=CALLBACKPARAMS_VAL(S);
_DECLARE_VECTOR(x);
_CONVERT_VECTOR(x);
p->closure = fun;
gsl_multifit_fdfsolver_set(FDFSOLVER_VAL(S), &(p->gslfun.mffdf), &v_x);
return Val_unit;
}
value ml_gsl_multifit_fdfsolver_free(value S)
{
struct callback_params *p=CALLBACKPARAMS_VAL(S);
remove_global_root(&(p->closure));
stat_free(p);
gsl_multifit_fdfsolver_free(FDFSOLVER_VAL(S));
return Val_unit;
}
ML1(gsl_multifit_fdfsolver_name, FDFSOLVER_VAL, copy_string)
ML1(gsl_multifit_fdfsolver_iterate, FDFSOLVER_VAL, Unit)
value ml_gsl_multifit_fdfsolver_position(value S, value x)
{
gsl_vector *pos;
_DECLARE_VECTOR(x);
_CONVERT_VECTOR(x);
pos=gsl_multifit_fdfsolver_position(FDFSOLVER_VAL(S));
gsl_vector_memcpy(&v_x, pos);
return Val_unit;
}
value ml_gsl_multifit_fdfsolver_get_state(value solv, value xo, value fo,
value dxo, value unit)
{
gsl_multifit_fdfsolver *S=FDFSOLVER_VAL(solv);
if(Is_block(xo)) {
value x=Unoption(xo);
_DECLARE_VECTOR(x);
_CONVERT_VECTOR(x);
gsl_vector_memcpy(&v_x, S->x);
}
if(Is_block(fo)) {
value f=Unoption(fo);
_DECLARE_VECTOR(f);
_CONVERT_VECTOR(f);
gsl_vector_memcpy(&v_f, S->f);
}
if(Is_block(dxo)) {
value dx=Unoption(dxo);
_DECLARE_VECTOR(dx);
_CONVERT_VECTOR(dx);
gsl_vector_memcpy(&v_dx, S->dx);
}
return Val_unit;
}
value ml_gsl_multifit_test_delta(value S, value epsabs, value epsrel)
{
gsl_multifit_fdfsolver *solv=FDFSOLVER_VAL(S);
int status = gsl_multifit_test_delta(solv->dx, solv->x,
Double_val(epsabs), Double_val(epsrel));
return Val_negbool(status);
}
value ml_gsl_multifit_test_gradient(value S, value epsabs, value g)
{
int status;
gsl_multifit_fdfsolver *solv=FDFSOLVER_VAL(S);
_DECLARE_VECTOR(g);
_CONVERT_VECTOR(g);
gsl_multifit_gradient(solv->J, solv->f, &v_g);
status = gsl_multifit_test_gradient(&v_g, Double_val(epsabs));
return Val_negbool(status);
}
value ml_gsl_multifit_covar(value S, value epsrel, value covar)
{
_DECLARE_MATRIX(covar);
_CONVERT_MATRIX(covar);
gsl_multifit_covar(FDFSOLVER_VAL(S)->J, Double_val(epsrel), &m_covar);
return Val_unit;
}
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