library: libRooFit
#include "RooParametricStepFunction.h"

RooParametricStepFunction

class description - source file - inheritance tree (.pdf)

class RooParametricStepFunction : public RooAbsPdf

Inheritance Chart:

TObject

TNamed

RooPrintable

RooAbsArg

RooAbsReal

RooAbsPdf

RooParametricStepFunction


    protected:

      virtual Double_t evaluate() const

    public:

                                RooParametricStepFunction(const char* name, const char* title, RooAbsReal& x, const RooArgList& coefList, TArrayD& limits, Int_t nBins = 1)
                                RooParametricStepFunction(const RooParametricStepFunction& other, const char* name = "0")
                        virtual ~RooParametricStepFunction()
               virtual Double_t analyticalIntegral(Int_t code, const char* rangeName = "0") const
                 static TClass* Class()
               virtual TObject* clone(const char* newname) const
                  virtual Int_t getAnalyticalIntegral(RooArgSet& allVars, RooArgSet& analVars, const char* rangeName = "0") const
                      Double_t* getLimits()
                          Int_t getnBins()
                virtual TClass* IsA() const
                   virtual void ShowMembers(TMemberInspector& insp, char* parent)
                   virtual void Streamer(TBuffer& b)
                           void StreamerNVirtual(TBuffer& b)

Data Members


    protected:

      RooRealProxy _x         
      RooListProxy _coefList  
           TArrayD _limits    
             Int_t _nBins     
        TIterator* _coefIter  ! do not persist

Class Description

 This PDF may be used to describe oddly shaped distributions.  It differs
 from a RooKeysPdf or a RooHistPdf in that a RooParametricStepFunction
 has free parameters.  In particular, any statistical uncertainty in
 sample used to model this PDF may be understood with these free parameters;
 this is not possible with non-parametric PDFs.

 The RooParametricStepFunction has Nbins-1 free parameters. Note that
 the limits of the dependent varaible must match the low and hi bin limits.

 An example of usage is:

 Int_t nbins(10);
 TArrayD limits(nbins+1);
 limits[0] = 0.0; //etc...
 RooArgList* list = new RooArgList("list");
 RooRealVar* binHeight0 = new RooRealVar("binHeight0","bin 0 Value",0.1,0.0,1.0);
 list->add(binHeight0); // up to binHeight8, ie. 9 parameters

 RooParametricStepFunction  aPdf = ("aPdf","PSF",*x,
                                    *list,limits,nbins);

RooParametricStepFunction(const char* name, const char* title, RooAbsReal& x, const RooArgList& coefList, TArrayD& limits, Int_t nBins) : RooAbsPdf(name, title), _x("x", "Dependent", this, x), _coefList("coefList","List of coefficients",this), _nBins(nBins)

 Constructor

RooParametricStepFunction(const RooParametricStepFunction& other, const char* name) : RooAbsPdf(other, name), _x("x", this, other._x), _coefList("coefList",this,other._coefList), _nBins(other._nBins)

 Copy constructor

~RooParametricStepFunction()

 Destructor

Int_t getAnalyticalIntegral(RooArgSet& allVars, RooArgSet& analVars, const char* /*rangeName*/) const

Double_t analyticalIntegral(Int_t code, const char* /*rangeName*/) const

Double_t evaluate() const

Int_t getnBins()

Double_t* getLimits()

Inline Functions

           TObject* clone(const char* newname) const
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)

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