MPQC 2.3.1
mcsearch.h
1//
2// mcsearch.h
3//
4// Based on line search routines found in lbfgs.f on the WWW.
5//
6
7#ifndef _math_optimize_mcsearch_h
8#define _math_optimize_mcsearch_h
9
10#ifdef __GNUC__
11#pragma interface
12#endif
13
14#include <math/optimize/opt.h>
15#include <util/misc/autovec.h>
16
17namespace sc {
18
24class MCSearch: public LineOpt {
25 protected:
26
27 // These are originally from the lb3 common block.
28 double gtol_, stpmin_, stpmax_;
29
30 // Local variables in mcsrch
31 double dg, fm, fx, fy, dgm, dgx, dgy, fxm, fym, stx, sty, dgxm,
32 dgym;
33 int infoc;
34 double finit, width, stmin, stmax;
35 bool stage1;
36 double width1, ftest1;
37 bool brackt;
38 double dginit, dgtest;
39
40 // Local variables in mcstep
41 double p, q, r__, s, sgnd, stpc, stpf, stpq, gamma, theta;
42 bool bound;
43
44 // these are saved from call to call
45 int info_;
47
48 void
49 mcstep(double *stx, double *fx, double *dx,
50 double *sty, double *fy, double *dy, double *stp,
51 double *fp, double *dp, bool *brackt, double *stpmin,
52 double *stpmax, int *info);
53
54 void
55 mcsrch(int *n, double *x, double *f,
56 double *g, double *s, double *stp, double *ftol,
57 double *xtol, int *maxfev, int *info, int *nfev,
58 double *wa);
59
60
61 void mcinit();
62 public:
63
68 ~MCSearch();
69 int update();
70
71 void init(RefSCVector& direction);
73
74};
75
76}
77
78#endif
79
80// Local Variables:
81// mode: c++
82// c-file-style: "CLJ"
83// End:
int update()
Take a step.
void init(RefSCVector &direction)
Initializes the line search object.
MCSearch(const Ref< KeyVal > &)
The MCSearch KeyVal CTOR does not read any input.
void init(RefSCVector &direction, Ref< Function > function)
Initializes the line search object.
Ref< Function > function() const
Returns information about the Function being optimized.
Definition opt.h:114
The RefSCVector class is a smart pointer to an SCVector specialization.
Definition matrix.h:55
A template class that maintains references counts.
Definition ref.h:332
The auto_vec class functions much like auto_ptr, except it contains references to arrays.
Definition autovec.h:58

Generated at Mon Jan 20 2025 00:00:00 for MPQC 2.3.1 using the documentation package Doxygen 1.13.2.