TUnuranDiscrDist

Function Members (Methods)

public:

	TUnuranDiscrDist(TF1* func = 0)
	TUnuranDiscrDist(const TUnuranDiscrDist&)
	TUnuranDiscrDist(double* begin, double* end)
virtual	~TUnuranDiscrDist()
double	Cdf(int x) const
static TClass*	Class()
virtual TUnuranDiscrDist*	Clone() const
bool	GetDomain(int& xmin, int& xmax) const
bool	HasCdf() const
bool	HasMode() const
bool	HasProbSum() const
virtual TClass*	IsA() const
int	Mode() const
TUnuranDiscrDist&	operator=(const TUnuranDiscrDist& rhs)
double	Pmf(int x) const
double	ProbSum() const
const vector<double>&	ProbVec() const
void	SetCdf(TF1* cdf)
void	SetDomain(int xmin, int xmax)
void	SetMode(int mode)
void	SetProbSum(double sum)
virtual void	ShowMembers(TMemberInspector& insp, char* parent)
virtual void	Streamer(TBuffer& b)
void	StreamerNVirtual(TBuffer& b)

Data Members

private:

TF1*	fCdf	pointer to the cumulative distribution function
bool	fHasDomain	flag to control if distribution has a defined domain (otherwise is [0,INT_MAX])
bool	fHasMode	flag to control if distribution has a pre-computed mode
bool	fHasSum	flag to control if distribution has a pre-computed sum of the probabilities
int	fMode	mode of the distribution
vector<double>	fPVec	Vector of the probabilities
TF1*	fPmf	pointer to a function calculating the probability
double	fSum	total sum of the probabilities in the given domain
double	fX[1]	! cached vector for using TF1::EvalPar
int	fXmax	upper value of the domain
int	fXmin	lower value of the domain

Class Charts

Function documentation

TUnuranDiscrDist(const TUnuranDiscrDist & rhs)

 Implementation of copy ctor using aassignment operator

double Cdf(int x) const

 evaluate the cumulative distribution
 otherwise evaluate from the sum of the probabilities

TUnuranDiscrDist(TF1 * func = 0)

      Constructor from a TF1 objects specifying the pdf

~TUnuranDiscrDist()

      Destructor (no operations)

{}

TUnuranDiscrDist * Clone()

      Clone (required by base class)

{ return new TUnuranDiscrDist(*this); }

void SetCdf(TF1* cdf)

      set cdf distribution. If a method requires it
      and is not set it is estimated numerically

{ fCdf = cdf; }

void SetDomain(int xmin, int xmax)

      Set the distribution domain, by default the domain is [0,INT_MAX]
      If xmin >= xmax a domain is removed

void SetMode(int mode)

      set the mode of the distribution (location of maximum probability)

{ fMode = mode; fHasMode=true;}

void SetProbSum(double sum)

      set the value of the sum of the probabilities in the given domain

{ fSum = sum; fHasSum=true; }

bool GetDomain(int& xmin, int& xmax) const

      check if distribution has domain and return in case its domain

int Mode()

      get the mode   (x location of function maximum)

{ return fMode; }

double ProbSum()

      return area of the pdf

{ return fSum; }

bool HasMode()

      flag to control if distribution provides the mode

{ return fHasMode; }

bool HasProbSum()

      flag to control if distribution provides the total area of the probability function

{ return fHasSum; }

bool HasCdf()

      flag to control if distribution provides also a Cdf

{ return fCdf != 0; }

const std::vector<double> & ProbVec()

      retrieve a reference to the vector of the probabilities : Prob(i)
      If the distribution is defined from a function (i.e. for distribution with undefined domain)
      the vector is empty.

{ return fPVec; }

class TUnuranDiscrDist: public TUnuranBaseDist

Function Members (Methods)

Data Members

Class Charts

Function documentation