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RooExponential.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitModels *
4 * File: $Id: RooExponential.h,v 1.10 2007/07/12 20:30:49 wouter Exp $
5 * Authors: *
6 * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
7 * DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
8 * *
9 * Copyright (c) 2000-2005, Regents of the University of California *
10 * and Stanford University. All rights reserved. *
11 * *
12 * Redistribution and use in source and binary forms, *
13 * with or without modification, are permitted according to the terms *
14 * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
15 *****************************************************************************/
16#ifndef ROO_EXPONENTIAL
17#define ROO_EXPONENTIAL
18
19#include "RooAbsPdf.h"
20#include "RooRealProxy.h"
21
22class RooRealVar;
23class RooAbsReal;
24
25class RooExponential : public RooAbsPdf {
26public:
28 RooExponential(const char *name, const char *title,
29 RooAbsReal& _x, RooAbsReal& _c);
30 RooExponential(const RooExponential& other, const char* name=0);
31 virtual TObject* clone(const char* newname) const { return new RooExponential(*this,newname); }
32 inline virtual ~RooExponential() { }
33
34 Int_t getAnalyticalIntegral(RooArgSet& allVars, RooArgSet& analVars, const char* rangeName=0) const ;
35 Double_t analyticalIntegral(Int_t code, const char* rangeName=0) const ;
36
37protected:
40
41 Double_t evaluate() const;
42
43private:
44 ClassDef(RooExponential,1) // Exponential PDF
45};
46
47#endif
int Int_t
Definition: RtypesCore.h:41
double Double_t
Definition: RtypesCore.h:55
#define ClassDef(name, id)
Definition: Rtypes.h:324
RooAbsPdf is the abstract interface for all probability density functions The class provides hybrid a...
Definition: RooAbsPdf.h:41
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:53
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:28
Exponential p.d.f.
RooRealProxy c
Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName=0) const
Interface function getAnalyticalIntergral advertises the analytical integrals that are supported.
virtual ~RooExponential()
virtual TObject * clone(const char *newname) const
RooRealProxy x
Double_t evaluate() const
cout << "exp(x=" << x << ",c=" << c << ")=" << exp(c*x) << endl ;
Double_t analyticalIntegral(Int_t code, const char *rangeName=0) const
Implements the actual analytical integral(s) advertised by getAnalyticalIntegral.
RooRealProxy is the concrete proxy for RooAbsReal objects A RooRealProxy is the general mechanism to ...
Definition: RooRealProxy.h:23
RooRealVar represents a fundamental (non-derived) real valued object.
Definition: RooRealVar.h:36
Mother of all ROOT objects.
Definition: TObject.h:37