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GSLMultiFitFunctionWrapper.h
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1 // @(#)root/mathmore:$Id$
2 // Authors: L. Moneta Dec 2006
3 
4  /**********************************************************************
5  * *
6  * Copyright (c) 2004 ROOT Foundation, CERN/PH-SFT *
7  * *
8  * This library is free software; you can redistribute it and/or *
9  * modify it under the terms of the GNU General Public License *
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13  * This library is distributed in the hope that it will be useful, *
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15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
16  * General Public License for more details. *
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20  * to the Free Software Foundation, Inc., 59 Temple Place, Suite *
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24 
25 // Header file for class GSLMultiMinFunctionWrapper
26 //
27 // Created by: moneta at Sat Nov 13 14:54:41 2004
28 //
29 // Last update: Sat Nov 13 14:54:41 2004
30 //
31 #ifndef ROOT_Math_GSLMultiFitFunctionWrapper
32 #define ROOT_Math_GSLMultiFitFunctionWrapper
33 
34 #include "gsl/gsl_multifit.h"
35 
37 
38 
39 #include <cassert>
40 
41 namespace ROOT {
42 namespace Math {
43 
44 
45 
46  typedef double ( * GSLMultiFitFPointer ) ( const gsl_vector *, void *, gsl_vector *);
47  typedef void ( * GSLMultiFitDfPointer ) ( const gsl_vector *, void *, gsl_matrix *);
48  typedef void ( * GSLMultiFitFdfPointer ) ( const gsl_vector *, void *, gsl_vector *, gsl_matrix *);
49 
50 
51 /**
52  wrapper to a multi-dim function withtout derivatives for multi-dimensional
53  minimization algorithm
54 
55  @ingroup MultiMin
56 */
57 
59 
60 public:
61 
63  {
64  fFunc.f = 0;
65  fFunc.df = 0;
66  fFunc.fdf = 0;
67  fFunc.n = 0;
68  fFunc.p = 0;
69  fFunc.params = 0;
70 #if GSL_MAJOR_VERSION > 1
71  fFunc.nevalf = 0;
72  fFunc.nevaldf = 0;
73 #endif
74  }
75 
76 
77  /// Fill gsl function structure from a C++ function iterator and size and number of residuals
78  template<class FuncVector>
79  void SetFunction(const FuncVector & f, unsigned int nres, unsigned int npar ) {
80  const void * p = &f;
81  assert (p != 0);
85  fFunc.n = nres;
86  fFunc.p = npar;
87  fFunc.params = const_cast<void *>(p);
88  }
89 
90  gsl_multifit_function_fdf * GetFunc() { return &fFunc; }
91 
92 
93  private:
94 
95  gsl_multifit_function_fdf fFunc;
96 
97 };
98 
99 
100 
101 } // namespace Math
102 } // namespace ROOT
103 
104 #endif /* ROOT_Math_GSLMultiMinFunctionWrapper */
Namespace for new ROOT classes and functions.
Definition: StringConv.hxx:21
#define f(i)
Definition: RSha256.hxx:104
void(* GSLMultiFitFdfPointer)(const gsl_vector *, void *, gsl_vector *, gsl_matrix *)
void(* GSLMultiFitDfPointer)(const gsl_vector *, void *, gsl_matrix *)
void SetFunction(const FuncVector &f, unsigned int nres, unsigned int npar)
Fill gsl function structure from a C++ function iterator and size and number of residuals.
Class for adapting a C++ functor class to C function pointers used by GSL MultiFit Algorithm The te...
Namespace for new Math classes and functions.
typedef void((*Func_t)())
wrapper to a multi-dim function withtout derivatives for multi-dimensional minimization algorithm ...
double(* GSLMultiFitFPointer)(const gsl_vector *, void *, gsl_vector *)