Jpp master_rocky-44-g75b7c4f75
the software that should make you happy
Loading...
Searching...
No Matches
Public Types | Public Member Functions | Public Attributes | Static Public Attributes | Protected Attributes | Private Member Functions | Static Private Member Functions | Private Attributes | List of all members
JROOT::JRootfit< JFs_t > Class Template Reference

ROOT Fit. More...

#include <JRootfit.hh>

Inheritance diagram for JROOT::JRootfit< JFs_t >:
JROOT::JRootfit_t< JFs_t > JFIT::JGandalf< JModel_t > JEEP::JMessage< T >

Public Types

typedef JRootfit_t< JFs_t > result_type
 
typedef JFIT_LOCAL::JTypedef_t< JModel_t >::parameter_type parameter_type
 Data type of fit parameter.
 

Public Member Functions

 JRootfit ()
 Default constructor.
 
template<class T >
const result_type & operator() (const TH1 &h1, const JFs_t &f1, const T &type, const index_list &ls=index_list(), const range_type &X=range_type())
 Fit.
 
template<class T >
const result_type & operator() (TH1 *h1, const JFs_t &f1, const T &type, const index_list &ls=index_list(), const range_type &X=range_type())
 Fit.
 
template<class T >
const result_type & operator() (const TH2 &h2, const JFs_t &f2, const T &type, const index_list &ls=index_list(), const range_type &X=range_type(), const range_type &Y=range_type())
 Fit.
 
template<class T >
const result_type & operator() (TH2 *h2, const JFs_t &f2, const T &type, const index_list &ls=index_list(), const range_type &X=range_type(), const range_type &Y=range_type())
 Fit.
 
template<class T >
const result_type & operator() (const TH3 &h3, const JFs_t &f3, const T &type, const index_list &ls=index_list(), const range_type &X=range_type(), const range_type &Y=range_type(), const range_type &Z=range_type())
 Fit.
 
template<class T >
const result_type & operator() (TH3 *h3, const JFs_t &f3, const T &type, const index_list &ls=index_list(), const range_type &X=range_type(), const range_type &Y=range_type(), const range_type &Z=range_type())
 Fit.
 
const JFs_t & getFunction () const
 Get function.
 
size_t getNumberOfParameters () const
 Get number of parameters.
 
size_t getNumberOfFreeParameters () const
 Get number of free parameters.
 
size_t getN () const
 Get number of data points.
 
double getChi2 () const
 Get chi2.
 
int getNDF () const
 Get number of degrees of freedom.
 
double getValue (size_t i) const
 Get value of parameter at given index.
 
double getError (size_t i) const
 Get error of parameter at given index.
 
template<class JFunction_t , class T , class ... Args>
result_type operator() (const JFunction_t &fit, T __begin, T __end, Args ...args)
 Multi-dimensional fit of multiple data sets.
 

Public Attributes

std::vector< parameter_type > parameters
 fit parameters
 
int numberOfIterations
 number of iterations
 
double lambda
 control parameter
 
JModel_t value
 value
 
JModel_t error
 error
 
JMATH::JMatrixNS V
 Hesse matrix.
 

Static Public Attributes

static JRootfit Fit
 Global fit object.
 
static int MAXIMUM_ITERATIONS = 1000
 maximal number of iterations
 
static double EPSILON = 1.0e-3
 maximal distance to minimum
 
static bool EPSILON_ABSOLUTE = false
 set epsilon to absolute difference instead of relative
 
static double LAMBDA_MIN = 0.01
 minimal value control parameter
 
static double LAMBDA_MAX = 100.0
 maximal value control parameter
 
static double LAMBDA_UP = 10.0
 multiplication factor control parameter
 
static double LAMBDA_DOWN = 10.0
 multiplication factor control parameter
 
static double PIVOT = std::numeric_limits<double>::epsilon()
 minimal value diagonal element of Hesse matrix
 
static int debug = 0
 debug level (default is off).
 

Protected Attributes

size_t npx
 number of data points
 
double chi2
 chi2
 

Private Member Functions

size_t getNumberOfFreeParameters ()
 
size_t getN ()
 
double getChi2 ()
 
int getNDF ()
 
template<class T >
const result_type & eval (const JFs_t &fs, const index_list &ls, const data_type< T > &data)
 Evaluate fit.
 
void reset ()
 Reset current parameters.
 
template<class JFunction_t , class T , class ... Args>
void update (const JFunction_t &fit, T __begin, T __end, Args ...args)
 Recursive method to update current parameters.
 
template<class JFunction_t >
void update (const JFunction_t &fit)
 Termination method to update current parameters.
 

Static Private Member Functions

static double get (const JModel_t &model, double JModel_t::*parameter)
 Read/write access to parameter value by data member.
 
static double & get (JModel_t &model, double JModel_t::*parameter)
 Read/write access to parameter value by data member.
 
static double get (const JModel_t &model, const size_t index)
 Read/write access to parameter value by index.
 
static double & get (JModel_t &model, const size_t index)
 Read/write access to parameter value by index.
 
static double get (const JModel_t &model, const int index)
 Read/write access to parameter value by index.
 
static double & get (JModel_t &model, const int index)
 Read/write access to parameter value by index.
 

Private Attributes

struct { 
 
typedef JGandalf< JFs_t >::result_type result_type
 
   result_type   result 
 
} fit 
 Auxiliary data structure for fit functions.
 
std::vector< double > h
 
JMATH::JVectorND x
 
struct { 
 
   result_type   result 
 
} current 
 
struct { 
 
   JModel_t   value 
 
   result_type   result 
 
} previous 
 

Detailed Description

template<class JFs_t>
class JROOT::JRootfit< JFs_t >

ROOT Fit.

Definition at line 938 of file JRootfit.hh.

Member Typedef Documentation

◆ result_type

template<class JFs_t >
JRootfit_t<JFs_t> JROOT::JRootfit< JFs_t >::result_type

Definition at line 943 of file JRootfit.hh.

◆ parameter_type

template<class JModel_t >
JFIT_LOCAL::JTypedef_t<JModel_t>::parameter_type JFIT::JGandalf< JModel_t >::parameter_type
inherited

Data type of fit parameter.

Definition at line 95 of file JGandalf.hh.

Constructor & Destructor Documentation

◆ JRootfit()

template<class JFs_t >
JROOT::JRootfit< JFs_t >::JRootfit ( )
inline

Default constructor.

Definition at line 949 of file JRootfit.hh.

950 {}

Member Function Documentation

◆ operator()() [1/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( const TH1 & h1,
const JFs_t & f1,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type() )
inline

Fit.

Parameters
h1histogram
f1start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Returns
result

Definition at line 964 of file JRootfit.hh.

969 {
970 return eval(f1, ls, data_type< m_1d<T> >(h1, X));
971 }
JROOT::JRootfit::eval
const result_type & eval(const JFs_t &fs, const index_list &ls, const data_type< T > &data)
Evaluate fit.
Definition JRootfit.hh:1136

◆ operator()() [2/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( TH1 * h1,
const JFs_t & f1,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type() )
inline

Fit.

The fitted function is added to the input histogram.

Parameters
h1pointer to histogram
f1start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Returns
result

Definition at line 987 of file JRootfit.hh.

992 {
993 (*this)(*h1, f1, type, ls, X);
994
995 h1->GetListOfFunctions()->Add(new JF1("f1",
996 this->value,
997 JTOOLS::join(X, getRange(h1->GetXaxis()))));
998
999 return static_cast<const result_type&>(*this);
1000 }
JFIT::JGandalf::value
JModel_t value
value
Definition JGandalf.hh:341
JROOT::JRootfit::result_type
JRootfit_t< JFs_t > result_type
Definition JRootfit.hh:943
GAUSS_LEGENDRE::f1
const JPolynome f1(1.0, 2.0, 3.0)
Function.
JROOT::getRange
range_type getRange(TAxis *pAxis)
Get range of given axis.
Definition JRootfit.hh:52
JTOOLS::join
JRange< T, JComparator_t > join(const JRange< T, JComparator_t > &first, const JRange< T, JComparator_t > &second)
Join ranges.
Definition JRange.hh:659

◆ operator()() [3/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( const TH2 & h2,
const JFs_t & f2,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type(),
const range_type & Y = range_type() )
inline

Fit.

Parameters
h2histogram
f2start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Yfit range
Returns
result

Definition at line 1015 of file JRootfit.hh.

1021 {
1022 return eval(f2, ls, data_type< m_2d<T> >(h2, X, Y));
1023 }

◆ operator()() [4/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( TH2 * h2,
const JFs_t & f2,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type(),
const range_type & Y = range_type() )
inline

Fit.

The fitted function is added to the input histogram.

Parameters
h2pointer to histogram
f2start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Yfit range
Returns
result

Definition at line 1040 of file JRootfit.hh.

1046 {
1047 (*this)(*h2, f2, type, ls, X, Y);
1048
1049 h2->GetListOfFunctions()->Add(new JF2("f2",
1050 this->value,
1051 JTOOLS::join(X, getRange(h2->GetXaxis())),
1052 JTOOLS::join(Y, getRange(h2->GetYaxis()))));
1053
1054 return static_cast<const result_type&>(*this);
1055 }

◆ operator()() [5/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( const TH3 & h3,
const JFs_t & f3,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type(),
const range_type & Y = range_type(),
const range_type & Z = range_type() )
inline

Fit.

Parameters
h3histogram
f3start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Yfit range
Zfit range
Returns
result

Definition at line 1071 of file JRootfit.hh.

1078 {
1079 return eval(f3, ls, data_type< m_3d<T> >(h3, X, Y, Z));
1080 }
f3
double f3(const double x, const double y, const double z)
3D function.
Definition JPolynome3D.cc:23

◆ operator()() [6/7]

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::operator() ( TH3 * h3,
const JFs_t & f3,
const T & type,
const index_list & ls = index_list(),
const range_type & X = range_type(),
const range_type & Y = range_type(),
const range_type & Z = range_type() )
inline

Fit.

The fitted function is added to the input histogram.

Parameters
h3pointer to histogram
f3start value
typetype of data for histogram unpacking
lslist of fixed parameters
Xfit range
Yfit range
Zfit range
Returns
result

Definition at line 1098 of file JRootfit.hh.

1105 {
1106 (*this)(*h3, f3, type, ls, X, Y, Z);
1107
1108 h3->GetListOfFunctions()->Add(new JF3("f3",
1109 this->value,
1110 JTOOLS::join(X, getRange(h3->GetXaxis())),
1111 JTOOLS::join(Y, getRange(h3->GetYaxis())),
1112 JTOOLS::join(Z, getRange(h3->GetZaxis()))));
1113
1114 return static_cast<const result_type&>(*this);
1115 }

◆ getNumberOfFreeParameters() [1/2]

template<class JFs_t >
size_t JROOT::JRootfit< JFs_t >::getNumberOfFreeParameters ( )
private

◆ getN() [1/2]

template<class JFs_t >
size_t JROOT::JRootfit< JFs_t >::getN ( )
private

◆ getChi2() [1/2]

template<class JFs_t >
double JROOT::JRootfit< JFs_t >::getChi2 ( )
private

◆ getNDF() [1/2]

template<class JFs_t >
int JROOT::JRootfit< JFs_t >::getNDF ( )
private

◆ eval()

template<class JFs_t >
template<class T >
const result_type & JROOT::JRootfit< JFs_t >::eval ( const JFs_t & fs,
const index_list & ls,
const data_type< T > & data )
inlineprivate

Evaluate fit.

Parameters
fsstart value
lslist of fixed parameters
datadata
Returns
result

Definition at line 1136 of file JRootfit.hh.

1139 {
1140 this->parameters.clear();
1141
1142 for (size_t i = 0; i != JFs_t::parameters.size(); ++i) {
1143 if (ls.count(i) == 0) {
1144 this->parameters.push_back(JFs_t::parameters[i]);
1145 }
1146 }
1147
1148 this->value = fs;
1149 this->npx = data.size();
1150 this->chi2 = static_cast<JGandalf<JFs_t>&>(*this)(this->fit, data.begin(), data.end()).chi2;
1151
1152 return static_cast<const result_type&>(*this);
1153 }
JFIT::JGandalf::parameters
std::vector< parameter_type > parameters
fit parameters
Definition JGandalf.hh:338
JROOT::JRootfit_t::chi2
double chi2
chi2
Definition JRootfit.hh:842
JROOT::JRootfit_t::npx
size_t npx
number of data points
Definition JRootfit.hh:841
JROOT::JRootfit::fit
const struct JROOT::JRootfit::@63 fit
Auxiliary data structure for fit functions.

◆ getFunction()

template<class JFs_t >
const JFs_t & JROOT::JRootfit_t< JFs_t >::getFunction ( ) const
inlineinherited

Get function.

Returns
function.

Definition at line 850 of file JRootfit.hh.

851 {
852 return this->value;
853 }

◆ getNumberOfParameters()

template<class JFs_t >
size_t JROOT::JRootfit_t< JFs_t >::getNumberOfParameters ( ) const
inlineinherited

Get number of parameters.

Returns
number of parameters

Definition at line 861 of file JRootfit.hh.

862 {
863 return JFs_t::parameters.size();
864 }

◆ getNumberOfFreeParameters() [2/2]

template<class JFs_t >
size_t JROOT::JRootfit_t< JFs_t >::getNumberOfFreeParameters ( ) const
inlineinherited

Get number of free parameters.

Returns
number of free parameters

Definition at line 872 of file JRootfit.hh.

873 {
874 return this->parameters.size();
875 }

◆ getN() [2/2]

template<class JFs_t >
size_t JROOT::JRootfit_t< JFs_t >::getN ( ) const
inlineinherited

Get number of data points.

Returns
number of data points

Definition at line 883 of file JRootfit.hh.

884 {
885 return npx;
886 }

◆ getChi2() [2/2]

template<class JFs_t >
double JROOT::JRootfit_t< JFs_t >::getChi2 ( ) const
inlineinherited

Get chi2.

Returns
chi2

Definition at line 894 of file JRootfit.hh.

895 {
896 return chi2;
897 }

◆ getNDF() [2/2]

template<class JFs_t >
int JROOT::JRootfit_t< JFs_t >::getNDF ( ) const
inlineinherited

Get number of degrees of freedom.

Returns
number of degrees of freedom

Definition at line 905 of file JRootfit.hh.

906 {
907 return (int) getN() - (int) getNumberOfFreeParameters();
908 }
JROOT::JRootfit_t::getNumberOfFreeParameters
size_t getNumberOfFreeParameters() const
Get number of free parameters.
Definition JRootfit.hh:872
JROOT::JRootfit_t::getN
size_t getN() const
Get number of data points.
Definition JRootfit.hh:883

◆ getValue()

template<class JFs_t >
double JROOT::JRootfit_t< JFs_t >::getValue ( size_t i) const
inlineinherited

Get value of parameter at given index.

Parameters
iindex

Definition at line 916 of file JRootfit.hh.

917 {
918 return getParameter(this->value, i);
919 }

◆ getError()

template<class JFs_t >
double JROOT::JRootfit_t< JFs_t >::getError ( size_t i) const
inlineinherited

Get error of parameter at given index.

Parameters
iindex

Definition at line 927 of file JRootfit.hh.

928 {
929 return getParameter(this->error, i);
930 }
JFIT::JGandalf::error
JModel_t error
error
Definition JGandalf.hh:342

◆ operator()() [7/7]

template<class JModel_t >
template<class JFunction_t , class T , class ... Args>
result_type JFIT::JGandalf< JModel_t >::operator() ( const JFunction_t & fit,
T __begin,
T __end,
Args ... args )
inlineinherited

Multi-dimensional fit of multiple data sets.

The fit function should return the chi2 as well as the partial derivatives for the current value of the model and a given data point.

Parameters
fitfit function
__beginbegin of data
__endend of data
argsoptional data
Returns
chi2 and gradient

Definition at line 160 of file JGandalf.hh.

161 {
162 using namespace std;
163 using namespace JPP;
164
165 // note that all model values should be assigned to the start value of the model before use
166 // because the actual list of model parameters can vary from fit to fit
167 // (e.g. if model consists of a container).
168
169 const size_t N = parameters.size();
170
171 V.resize(N);
172 h.resize(N);
173 x.resize(N);
174
175 previous.result.chi2 = numeric_limits<double>::max();
176
177 current.result.chi2 = numeric_limits<double>::max();
178 current.result.gradient = value;
179 current.result.gradient = zero;
180
181 error = value;
182 error = zero;
183
184 lambda = LAMBDA_MIN;
185
186 for (numberOfIterations = 0; numberOfIterations != MAXIMUM_ITERATIONS; ++numberOfIterations) {
187
188 DEBUG("step: " << numberOfIterations << endl);
189
190 reset();
191
192 update(fit, __begin, __end, args...);
193
194 DEBUG("lambda: " << FIXED(12,5) << lambda << endl);
195 DEBUG("chi2: " << FIXED(12,5) << current.result.chi2 << endl);
196
197 if (current.result.chi2 < previous.result.chi2) {
198
199 if (numberOfIterations != 0) {
200
201 const double tolerance = EPSILON * (EPSILON_ABSOLUTE ? 1.0 : fabs(previous.result.chi2));
202
203 if (fabs(previous.result.chi2 - current.result.chi2) <= tolerance) {
204
205 // normal end
206
207 const result_type result = current.result;
208
209 reset();
210
211 update(fit, __begin, __end, args...);
212
213 try {
214 V.invert();
215 }
216 catch (const exception& error) {}
217
218 for (size_t i = 0; i != N; ++i) {
219 get(error, parameters[i]) = sqrt(V(i,i));
220 }
221
222 return result;
223 }
224
225 if (lambda > LAMBDA_MIN) {
226 lambda /= LAMBDA_DOWN;
227 }
228 }
229
230 // store current values
231
232 previous.value = value;
233 previous.result = current.result;
234
235 } else {
236
237 value = previous.value; // restore value
238
239 lambda *= LAMBDA_UP;
240
241 if (lambda > LAMBDA_MAX) {
242 break;
243 }
244
245 reset();
246
247 update(fit, __begin, __end, args...);
248 }
249
250 DEBUG("Hesse matrix:" << endl << V << endl);
251
252 // force definite positiveness
253
254 for (size_t i = 0; i != N; ++i) {
255
256 if (V(i,i) < PIVOT) {
257 V(i,i) = PIVOT;
258 }
259
260 h[i] = 1.0 / sqrt(V(i,i));
261 }
262
263 // normalisation
264
265 for (size_t row = 0; row != N; ++row) {
266 for (size_t col = 0; col != row; ++col) {
267 V(row,col) *= h[row] * h[col];
268 V(col,row) = V(row,col);
269 }
270 }
271
272 for (size_t i = 0; i != N; ++i) {
273 V(i,i) = 1.0 + lambda;
274 }
275
276 // solve A x = b
277
278 for (size_t col = 0; col != N; ++col) {
279 x[col] = h[col] * get(current.result.gradient, parameters[col]);
280 }
281
282 try {
283 V.solve(x);
284 }
285 catch (const exception& error) {
286
287 ERROR("JGandalf: " << error.what() << endl << V << endl);
288
289 break;
290 }
291
292 // update value
293
294 for (size_t row = 0; row != N; ++row) {
295
296 DEBUG("u[" << noshowpos << setw(3) << row << "] = " << showpos << FIXED(15,5) << get(value, parameters[row]));
297
298 get(value, parameters[row]) -= h[row] * x[row];
299
300 DEBUG(" -> " << FIXED(15,5) << get(value, parameters[row]) << noshowpos << endl);
301 }
302
303 model(value);
304 }
305
306 // abnormal end
307
308 const result_type result = previous.result;
309
310 value = previous.value; // restore value
311
312 reset();
313
314 update(fit, __begin, __end, args...);
315
316 try {
317 V.invert();
318 }
319 catch (const exception& error) {}
320
321 for (size_t i = 0; i != N; ++i) {
322 get(error, parameters[i]) = sqrt(V(i,i));
323 }
324
325 return result;
326 }
DEBUG
#define DEBUG(A)
Message macros.
Definition JMessage.hh:62
ERROR
#define ERROR(A)
Definition JMessage.hh:66
JFIT::JGandalf::lambda
double lambda
control parameter
Definition JGandalf.hh:340
JFIT::JGandalf::LAMBDA_MIN
static double LAMBDA_MIN
minimal value control parameter
Definition JGandalf.hh:332
JFIT::JGandalf::x
JMATH::JVectorND x
Definition JGandalf.hh:483
JFIT::JGandalf::current
struct JFIT::JGandalf::@12 current
JFIT::JGandalf::reset
void reset()
Reset current parameters.
Definition JGandalf.hh:349
JFIT::JGandalf::LAMBDA_DOWN
static double LAMBDA_DOWN
multiplication factor control parameter
Definition JGandalf.hh:335
JFIT::JGandalf::LAMBDA_UP
static double LAMBDA_UP
multiplication factor control parameter
Definition JGandalf.hh:334
JFIT::JGandalf::numberOfIterations
int numberOfIterations
number of iterations
Definition JGandalf.hh:339
JFIT::JGandalf::EPSILON_ABSOLUTE
static bool EPSILON_ABSOLUTE
set epsilon to absolute difference instead of relative
Definition JGandalf.hh:331
JFIT::JGandalf::h
std::vector< double > h
Definition JGandalf.hh:482
JFIT::JGandalf::get
static double get(const JModel_t &model, double JModel_t::*parameter)
Read/write access to parameter value by data member.
Definition JGandalf.hh:412
JFIT::JGandalf::MAXIMUM_ITERATIONS
static int MAXIMUM_ITERATIONS
maximal number of iterations
Definition JGandalf.hh:329
JFIT::JGandalf::PIVOT
static double PIVOT
minimal value diagonal element of Hesse matrix
Definition JGandalf.hh:336
JFIT::JGandalf::update
void update(const JFunction_t &fit, T __begin, T __end, Args ...args)
Recursive method to update current parameters.
Definition JGandalf.hh:369
JFIT::JGandalf::result
result_type result
Definition JGandalf.hh:486
JFIT::JGandalf::EPSILON
static double EPSILON
maximal distance to minimum
Definition JGandalf.hh:330
JFIT::JGandalf::V
JMATH::JMatrixNS V
Hesse matrix.
Definition JGandalf.hh:343
JFIT::JGandalf::LAMBDA_MAX
static double LAMBDA_MAX
maximal value control parameter
Definition JGandalf.hh:333
JFIT::JGandalf::previous
struct JFIT::JGandalf::@13 previous
JFIT::model
void model(JModel_t &value)
Auxiliary function to constrain model during fit.
Definition JGandalf.hh:56
JPP
This name space includes all other name spaces (except KM3NETDAQ, KM3NET and ANTARES).
Definition JAAnetToolkit.hh:43
get_convergence_angle.args
args
Definition get_convergence_angle.py:19
FIXED
Auxiliary data structure for floating point format specification.
Definition JManip.hh:448
JMATH::JMatrixND::resize
void resize(const size_t size)
Resize matrix.
Definition JMatrixND.hh:446
JMATH::JMatrixNS::solve
void solve(JVectorND_t &u)
Get solution of equation A x = b.
Definition JMatrixNS.hh:308
JMATH::JMatrixNS::invert
void invert()
Invert matrix according LDU decomposition.
Definition JMatrixNS.hh:75

◆ reset()

template<class JModel_t >
void JFIT::JGandalf< JModel_t >::reset ( )
inlineprivateinherited

Reset current parameters.

Definition at line 349 of file JGandalf.hh.

350 {
351 using namespace JPP;
352
353 current.result.chi2 = 0.0;
354 current.result.gradient = zero;
355
356 V.reset();
357 }
JMATH::JMatrixND::reset
JMatrixND & reset()
Set matrix to the null matrix.
Definition JMatrixND.hh:459

◆ update() [1/2]

template<class JModel_t >
template<class JFunction_t , class T , class ... Args>
void JFIT::JGandalf< JModel_t >::update ( const JFunction_t & fit,
T __begin,
T __end,
Args ... args )
inlineprivateinherited

Recursive method to update current parameters.

Parameters
fitfit function
__beginbegin of data
__endend of data
argsoptional data

Definition at line 369 of file JGandalf.hh.

370 {
371 for (T i = __begin; i != __end; ++i) {
372
373 const result_type& result = fit(value, *i);
374
375 current.result.chi2 += result.chi2;
376 current.result.gradient += result.gradient;
377
378 for (size_t row = 0; row != parameters.size(); ++row) {
379 for (size_t col = row; col != parameters.size(); ++col) {
380 V(row,col) += get(result.gradient, parameters[row]) * get(result.gradient, parameters[col]);
381 }
382 }
383 }
384
385 update(fit, args...);
386 }
JFIT::JGandalf::result_type::gradient
JModel_t gradient
partial derivatives of chi2
Definition JGandalf.hh:136
JFIT::JGandalf::result_type::chi2
double chi2
chi2
Definition JGandalf.hh:135

◆ update() [2/2]

template<class JModel_t >
template<class JFunction_t >
void JFIT::JGandalf< JModel_t >::update ( const JFunction_t & fit)
inlineprivateinherited

Termination method to update current parameters.

Parameters
fitfit function

Definition at line 395 of file JGandalf.hh.

396 {
397 for (size_t row = 0; row != parameters.size(); ++row) {
398 for (size_t col = 0; col != row; ++col) {
399 V(row,col) = V(col,row);
400 }
401 }
402 }

◆ get() [1/6]

template<class JModel_t >
static double JFIT::JGandalf< JModel_t >::get ( const JModel_t & model,
double JModel_t::* parameter )
inlinestaticprivateinherited

Read/write access to parameter value by data member.

Parameters
modelmodel
parameterparameter
Returns
value

Definition at line 412 of file JGandalf.hh.

413 {
414 return model.*parameter;
415 }

◆ get() [2/6]

template<class JModel_t >
static double & JFIT::JGandalf< JModel_t >::get ( JModel_t & model,
double JModel_t::* parameter )
inlinestaticprivateinherited

Read/write access to parameter value by data member.

Parameters
modelmodel
parameterparameter
Returns
value

Definition at line 425 of file JGandalf.hh.

426 {
427 return model.*parameter;
428 }

◆ get() [3/6]

template<class JModel_t >
static double JFIT::JGandalf< JModel_t >::get ( const JModel_t & model,
const size_t index )
inlinestaticprivateinherited

Read/write access to parameter value by index.

Parameters
modelmodel
indexindex
Returns
value

Definition at line 438 of file JGandalf.hh.

439 {
440 return model[index];
441 }

◆ get() [4/6]

template<class JModel_t >
static double & JFIT::JGandalf< JModel_t >::get ( JModel_t & model,
const size_t index )
inlinestaticprivateinherited

Read/write access to parameter value by index.

Parameters
modelmodel
indexindex
Returns
value

Definition at line 451 of file JGandalf.hh.

452 {
453 return model[index];
454 }

◆ get() [5/6]

template<class JModel_t >
static double JFIT::JGandalf< JModel_t >::get ( const JModel_t & model,
const int index )
inlinestaticprivateinherited

Read/write access to parameter value by index.

Parameters
modelmodel
indexindex
Returns
value

Definition at line 464 of file JGandalf.hh.

465 {
466 return model[index];
467 }

◆ get() [6/6]

template<class JModel_t >
static double & JFIT::JGandalf< JModel_t >::get ( JModel_t & model,
const int index )
inlinestaticprivateinherited

Read/write access to parameter value by index.

Parameters
modelmodel
indexindex
Returns
value

Definition at line 477 of file JGandalf.hh.

478 {
479 return model[index];
480 }

Member Data Documentation

◆ Fit

template<class JFs_t >
JRootfit< JFs_t > JROOT::JRootfit< JFs_t >::Fit
static

Global fit object.

Definition at line 1118 of file JRootfit.hh.

◆ result

template<class JFs_t >
result_type JROOT::JRootfit< JFs_t >::result
mutableprivate

Definition at line 1223 of file JRootfit.hh.

◆ [struct]

const struct { ... } JROOT::JRootfit< JFs_t >::fit

Auxiliary data structure for fit functions.

◆ npx

template<class JFs_t >
size_t JROOT::JRootfit_t< JFs_t >::npx
protectedinherited

number of data points

Definition at line 841 of file JRootfit.hh.

◆ chi2

template<class JFs_t >
double JROOT::JRootfit_t< JFs_t >::chi2
protectedinherited

chi2

Definition at line 842 of file JRootfit.hh.

◆ MAXIMUM_ITERATIONS

template<class JModel_t >
int JFIT::JGandalf< JModel_t >::MAXIMUM_ITERATIONS = 1000
staticinherited

maximal number of iterations

maximal number of iterations.

Definition at line 329 of file JGandalf.hh.

◆ EPSILON

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::EPSILON = 1.0e-3
staticinherited

maximal distance to minimum

maximal distance to minimum.

Definition at line 330 of file JGandalf.hh.

◆ EPSILON_ABSOLUTE

template<class JModel_t >
bool JFIT::JGandalf< JModel_t >::EPSILON_ABSOLUTE = false
staticinherited

set epsilon to absolute difference instead of relative

set epsilon to absolute difference instead of relative.

Definition at line 331 of file JGandalf.hh.

◆ LAMBDA_MIN

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::LAMBDA_MIN = 0.01
staticinherited

minimal value control parameter

Definition at line 332 of file JGandalf.hh.

◆ LAMBDA_MAX

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::LAMBDA_MAX = 100.0
staticinherited

maximal value control parameter

Definition at line 333 of file JGandalf.hh.

◆ LAMBDA_UP

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::LAMBDA_UP = 10.0
staticinherited

multiplication factor control parameter

Definition at line 334 of file JGandalf.hh.

◆ LAMBDA_DOWN

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::LAMBDA_DOWN = 10.0
staticinherited

multiplication factor control parameter

Definition at line 335 of file JGandalf.hh.

◆ PIVOT

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::PIVOT = std::numeric_limits<double>::epsilon()
staticinherited

minimal value diagonal element of Hesse matrix

minimal value diagonal element of matrix

Definition at line 336 of file JGandalf.hh.

◆ parameters

template<class JModel_t >
std::vector<parameter_type> JFIT::JGandalf< JModel_t >::parameters
inherited

fit parameters

Definition at line 338 of file JGandalf.hh.

◆ numberOfIterations

template<class JModel_t >
int JFIT::JGandalf< JModel_t >::numberOfIterations
inherited

number of iterations

Definition at line 339 of file JGandalf.hh.

◆ lambda

template<class JModel_t >
double JFIT::JGandalf< JModel_t >::lambda
inherited

control parameter

Definition at line 340 of file JGandalf.hh.

◆ value

template<class JModel_t >
JModel_t JFIT::JGandalf< JModel_t >::value
inherited

value

Definition at line 341 of file JGandalf.hh.

◆ error

template<class JModel_t >
JModel_t JFIT::JGandalf< JModel_t >::error
inherited

error

Definition at line 342 of file JGandalf.hh.

◆ V

template<class JModel_t >
JMATH::JMatrixNS JFIT::JGandalf< JModel_t >::V
inherited

Hesse matrix.

Definition at line 343 of file JGandalf.hh.

◆ h

template<class JModel_t >
std::vector<double> JFIT::JGandalf< JModel_t >::h
privateinherited

Definition at line 482 of file JGandalf.hh.

◆ x

template<class JModel_t >
JMATH::JVectorND JFIT::JGandalf< JModel_t >::x
privateinherited

Definition at line 483 of file JGandalf.hh.

◆ [struct]

struct { ... } JFIT::JGandalf< JModel_t >::current

◆ [struct]

struct { ... } JFIT::JGandalf< JModel_t >::previous

◆ debug

template<class T >
int JEEP::JMessage< T >::debug = 0
staticinherited

debug level (default is off).

Definition at line 45 of file JMessage.hh.

The documentation for this class was generated from the following file:
Generated by doxygen 1.12.0