1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/* multimin/fminimizer.c
*
* Copyright (C) 2002 Tuomo Keskitalo, Ivo Alxneit
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_multimin.h>
gsl_multimin_fminimizer *
gsl_multimin_fminimizer_alloc (const gsl_multimin_fminimizer_type * T,
size_t n)
{
int status;
gsl_multimin_fminimizer *s =
(gsl_multimin_fminimizer *) malloc (sizeof (gsl_multimin_fminimizer));
if (s == 0)
{
GSL_ERROR_VAL ("failed to allocate space for minimizer struct",
GSL_ENOMEM, 0);
}
s->type = T;
s->x = gsl_vector_calloc (n);
if (s->x == 0)
{
free (s);
GSL_ERROR_VAL ("failed to allocate space for x", GSL_ENOMEM, 0);
}
s->state = malloc (T->size);
if (s->state == 0)
{
gsl_vector_free (s->x);
free (s);
GSL_ERROR_VAL ("failed to allocate space for minimizer state",
GSL_ENOMEM, 0);
}
status = (T->alloc) (s->state, n);
if (status != GSL_SUCCESS)
{
free (s->state);
gsl_vector_free (s->x);
free (s);
GSL_ERROR_VAL ("failed to initialize minimizer state", GSL_ENOMEM, 0);
}
return s;
}
int
gsl_multimin_fminimizer_set (gsl_multimin_fminimizer * s,
gsl_multimin_function * f,
const gsl_vector * x,
const gsl_vector * step_size)
{
if (s->x->size != f->n)
{
GSL_ERROR ("function incompatible with solver size", GSL_EBADLEN);
}
if (x->size != f->n || step_size->size != f->n)
{
GSL_ERROR ("vector length not compatible with function", GSL_EBADLEN);
}
s->f = f;
gsl_vector_memcpy (s->x,x);
return (s->type->set) (s->state, s->f, s->x, &(s->size), step_size);
}
void
gsl_multimin_fminimizer_free (gsl_multimin_fminimizer * s)
{
(s->type->free) (s->state);
free (s->state);
gsl_vector_free (s->x);
free (s);
}
int
gsl_multimin_fminimizer_iterate (gsl_multimin_fminimizer * s)
{
return (s->type->iterate) (s->state, s->f, s->x, &(s->size), &(s->fval));
}
const char *
gsl_multimin_fminimizer_name (const gsl_multimin_fminimizer * s)
{
return s->type->name;
}
gsl_vector *
gsl_multimin_fminimizer_x (const gsl_multimin_fminimizer * s)
{
return s->x;
}
double
gsl_multimin_fminimizer_minimum (const gsl_multimin_fminimizer * s)
{
return s->fval;
}
double
gsl_multimin_fminimizer_size (const gsl_multimin_fminimizer * s)
{
return s->size;
}
|
