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ROOT 6.16/01 Reference Guide |
namespace defining utility free functions using in Fit for evaluating the various fit method functions (chi2, likelihood, etc..) given the data and the model function More...
Classes | |
struct | Evaluate |
class | IntegralEvaluator |
class | LikelihoodAux |
class | LikelihoodAux< double > |
Typedefs | |
typedef ROOT::Math::IParamMultiGradFunction | IGradModelFunction |
template<class T > | |
using | IGradModelFunctionTempl = ROOT::Math::IParamMultiGradFunctionTempl< T > |
typedef ROOT::Math::IParamMultiFunction | IModelFunction |
template<class T > | |
using | IModelFunctionTempl = ROOT::Math::IParamMultiFunctionTempl< T > |
Functions | |
template<class GFunc > | |
void | CalculateGradientIntegral (const GFunc &gfunc, const double *x1, const double *x2, const double *p, double *g) |
bool | CheckInfNaNValue (double &rval) |
double | CorrectValue (double rval) |
double | EvaluateChi2 (const IModelFunction &func, const BinData &data, const double *x, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy, unsigned nChunks=0) |
Chi2 Functions. More... | |
double | EvaluateChi2Effective (const IModelFunction &func, const BinData &data, const double *x, unsigned int &nPoints) |
evaluate the effective Chi2 given a model function and the data at the point x. More... | |
void | EvaluateChi2Gradient (const IModelFunction &func, const BinData &data, const double *x, double *grad, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy=ROOT::Fit::ExecutionPolicy::kSerial, unsigned nChunks=0) |
evaluate the Chi2 gradient given a model function and the data at the point x. More... | |
double | EvaluateChi2Residual (const IModelFunction &func, const BinData &data, const double *x, unsigned int ipoint, double *g=0) |
evaluate the residual contribution to the Chi2 given a model function and the BinPoint data and if the pointer g is not null evaluate also the gradient of the residual. More... | |
double | EvaluateLogL (const IModelFunction &func, const UnBinData &data, const double *p, int iWeight, bool extended, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy, unsigned nChunks=0) |
evaluate the LogL given a model function and the data at the point x. More... | |
void | EvaluateLogLGradient (const IModelFunction &func, const UnBinData &data, const double *x, double *grad, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy=ROOT::Fit::ExecutionPolicy::kSerial, unsigned nChunks=0) |
evaluate the LogL gradient given a model function and the data at the point x. More... | |
double | EvaluatePdf (const IModelFunction &func, const UnBinData &data, const double *x, unsigned int ipoint, double *g=0) |
evaluate the pdf contribution to the LogL given a model function and the BinPoint data. More... | |
double | EvaluatePoissonBinPdf (const IModelFunction &func, const BinData &data, const double *x, unsigned int ipoint, double *g=0) |
evaluate the pdf contribution to the Poisson LogL given a model function and the BinPoint data. More... | |
double | EvaluatePoissonLogL (const IModelFunction &func, const BinData &data, const double *x, int iWeight, bool extended, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy, unsigned nChunks=0) |
evaluate the Poisson LogL given a model function and the data at the point x. More... | |
void | EvaluatePoissonLogLGradient (const IModelFunction &func, const BinData &data, const double *x, double *grad, unsigned int &nPoints, ROOT::Fit::ExecutionPolicy executionPolicy=ROOT::Fit::ExecutionPolicy::kSerial, unsigned nChunks=0) |
evaluate the Poisson LogL given a model function and the data at the point x. More... | |
unsigned | setAutomaticChunking (unsigned nEvents) |
namespace defining utility free functions using in Fit for evaluating the various fit method functions (chi2, likelihood, etc..) given the data and the model function
using ROOT::Fit::FitUtil::IGradModelFunctionTempl = typedef ROOT::Math::IParamMultiGradFunctionTempl<T> |
using ROOT::Fit::FitUtil::IModelFunctionTempl = typedef ROOT::Math::IParamMultiFunctionTempl<T> |
void ROOT::Fit::FitUtil::CalculateGradientIntegral | ( | const GFunc & | gfunc, |
const double * | x1, | ||
const double * | x2, | ||
const double * | p, | ||
double * | g | ||
) |
Definition at line 202 of file FitUtil.cxx.
bool ROOT::Fit::FitUtil::CheckInfNaNValue | ( | double & | rval | ) |
Definition at line 181 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::CorrectValue | ( | double | rval | ) |
Definition at line 167 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluateChi2 | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy, | ||
unsigned | nChunks = 0 |
||
) |
Chi2 Functions.
evaluate the Chi2 given a model function and the data at the point x. return also nPoints as the effective number of used points in the Chi2 evaluation
Definition at line 226 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluateChi2Effective | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
unsigned int & | nPoints | ||
) |
evaluate the effective Chi2 given a model function and the data at the point x.
The effective chi2 uses the errors on the coordinates : W = 1/(sigma_y**2 + ( sigma_x_i * df/dx_i )**2 ) return also nPoints as the effective number of used points in the Chi2 evaluation
Definition at line 410 of file FitUtil.cxx.
void ROOT::Fit::FitUtil::EvaluateChi2Gradient | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
double * | grad, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy = ROOT::Fit::ExecutionPolicy::kSerial , |
||
unsigned | nChunks = 0 |
||
) |
evaluate the Chi2 gradient given a model function and the data at the point x.
return also nPoints as the effective number of used points in the Chi2 evaluation
Definition at line 638 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluateChi2Residual | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | p, | ||
unsigned int | i, | ||
double * | g = 0 |
||
) |
evaluate the residual contribution to the Chi2 given a model function and the BinPoint data and if the pointer g is not null evaluate also the gradient of the residual.
evaluate the chi2 contribution (residual term) only for data with no coord-errors This function is used in the specialized least square algorithms like FUMILI or L.M.
If the function provides parameter derivatives they are used otherwise a simple derivative calculation is used
if we have error on the coordinates the method is not yet implemented integral option is also not yet implemented one can use in that case normal chi2 method
Definition at line 531 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluateLogL | ( | const IModelFunction & | func, |
const UnBinData & | data, | ||
const double * | p, | ||
int | iWeight, | ||
bool | extended, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy, | ||
unsigned | nChunks = 0 |
||
) |
evaluate the LogL given a model function and the data at the point x.
return also nPoints as the effective number of used points in the LogL evaluation
void ROOT::Fit::FitUtil::EvaluateLogLGradient | ( | const IModelFunction & | func, |
const UnBinData & | data, | ||
const double * | x, | ||
double * | grad, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy = ROOT::Fit::ExecutionPolicy::kSerial , |
||
unsigned | nChunks = 0 |
||
) |
evaluate the LogL gradient given a model function and the data at the point x.
return also nPoints as the effective number of used points in the LogL evaluation
Definition at line 1118 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluatePdf | ( | const IModelFunction & | func, |
const UnBinData & | data, | ||
const double * | x, | ||
unsigned int | ipoint, | ||
double * | g = 0 |
||
) |
evaluate the pdf contribution to the LogL given a model function and the BinPoint data.
If the pointer g is not null evaluate also the gradient of the pdf. If the function provides parameter derivatives they are used otherwise a simple derivative calculation is used
Definition at line 850 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluatePoissonBinPdf | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
unsigned int | ipoint, | ||
double * | g = 0 |
||
) |
evaluate the pdf contribution to the Poisson LogL given a model function and the BinPoint data.
evaluate the pdf (Poisson) contribution to the logl (return actually log of pdf) and its gradient
If the pointer g is not null evaluate also the gradient of the Poisson pdf. If the function provides parameter derivatives they are used otherwise a simple derivative calculation is used
Definition at line 1260 of file FitUtil.cxx.
double ROOT::Fit::FitUtil::EvaluatePoissonLogL | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
int | iWeight, | ||
bool | extended, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy, | ||
unsigned | nChunks = 0 |
||
) |
evaluate the Poisson LogL given a model function and the data at the point x.
return also nPoints as the effective number of used points in the LogL evaluation By default is extended, pass extedend to false if want to be not extended (MultiNomial)
Definition at line 1363 of file FitUtil.cxx.
void ROOT::Fit::FitUtil::EvaluatePoissonLogLGradient | ( | const IModelFunction & | func, |
const BinData & | data, | ||
const double * | x, | ||
double * | grad, | ||
unsigned int & | nPoints, | ||
ROOT::Fit::ExecutionPolicy | executionPolicy = ROOT::Fit::ExecutionPolicy::kSerial , |
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unsigned | nChunks = 0 |
||
) |
evaluate the Poisson LogL given a model function and the data at the point x.
return also nPoints as the effective number of used points in the LogL evaluation
Definition at line 1563 of file FitUtil.cxx.
unsigned ROOT::Fit::FitUtil::setAutomaticChunking | ( | unsigned | nEvents | ) |
Definition at line 1747 of file FitUtil.cxx.