class TFoamSampler: public ROOT::Math::DistSampler


   TFoamSampler class
   class implementing  the ROOT::Math::DistSampler interface using FOAM
   for sampling arbitrary distributions.

Function Members (Methods)

public:

virtual	~TFoamSampler()
ROOT::Math::DistSampler	ROOT::Math::DistSampler::DistSampler()
ROOT::Math::DistSampler	ROOT::Math::DistSampler::DistSampler(const ROOT::Math::DistSampler&)
virtual bool	ROOT::Math::DistSampler::Generate(unsigned int nevt, ROOT::Fit::UnBinData& data)
virtual bool	ROOT::Math::DistSampler::Generate(unsigned int nevt, const int* nbins, ROOT::Fit::BinData& data, bool extend = true)
bool	ROOT::Math::DistSampler::Generate(unsigned int nevt, int nbins, double xmin, double xmax, ROOT::Fit::BinData& data, bool extend = true)
virtual TRandom*	GetRandom()
virtual bool	Init(const char* = "")
virtual bool	Init(const ROOT::Math::DistSamplerOptions& opt)
unsigned int	ROOT::Math::DistSampler::NDim() const
TFoamSampler&	operator=(const TFoamSampler&)
const ROOT::Math::IMultiGenFunction&	ROOT::Math::DistSampler::ParentPdf() const
virtual bool	Sample(double* x)
virtual double	ROOT::Math::DistSampler::Sample1D()
virtual bool	SampleBin(double prob, double& value, double* error = 0)
virtual bool	ROOT::Math::DistSampler::SampleBins(unsigned int n, const double* prob, double* values, double* errors = 0)
virtual void	ROOT::Math::DistSampler::SetArea(double)
virtual void	SetFunction(const ROOT::Math::IGenFunction& func)
void	SetFunction(TF1* pdf)
void	ROOT::Math::DistSampler::SetFunction<const ROOT::Math::IBaseFunctionOneDim>(ROOT::Math::const IBaseFunctionOneDim& func, unsigned int dim)
virtual void	ROOT::Math::DistSampler::SetMode(double)
virtual void	SetRandom(TRandom* r)
void	ROOT::Math::DistSampler::SetRange(const ROOT::Fit::DataRange& range)
void	ROOT::Math::DistSampler::SetRange(const double* xmin, const double* xmax)
void	ROOT::Math::DistSampler::SetRange(double xmin, double xmax, int icoord = 0)
virtual void	SetSeed(unsigned int seed)
	TFoamSampler()
	TFoamSampler(const TFoamSampler&)

protected:

virtual void	ROOT::Math::DistSampler::DoSetFunction(const ROOT::Math::IMultiGenFunction& func, bool copy)
bool	ROOT::Math::DistSampler::IsInitialized()
const ROOT::Fit::DataRange&	ROOT::Math::DistSampler::PdfRange() const

Data Members

private:

TFoam*	fFoam	foam engine class
TFoamIntegrand*	fFoamDist	foam distribution interface
const ROOT::Math::IGenFunction*	fFunc1D	1D function pointer

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TFoamSampler()

    fOneDim(false)
    fDiscrete(false),
    fHasMode(false), fHasArea(false),
    fMode(0), fArea(0),

{}

~TFoamSampler()

bool Init(const char* = "")

bool Init(const ROOT::Math::DistSamplerOptions& opt)

 initialize foam classes using the given algorithm

void SetFunction(TF1* pdf)

 set function from a TF1 pointer

void SetRandom(TRandom* r)

 set random generator (must be called before Init to have effect)

void SetSeed(unsigned int seed)

 set random generator seed (must be called before Init to have effect)

TRandom * GetRandom()

 get random generator used

bool Sample(double* x)

 sample multi-dim distributions

bool SampleBin(double prob, double& value, double* error = 0)

 sample a bin according to Poisson statistics

TFoamSampler()

 default constructor

void SetFunction(const ROOT::Math::IGenFunction& func)

 set the parent function distribution to use for random sampling (one dim case)