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RooFirstMoment.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitCore *
4 * File: $Id$
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_FIRST_MOMENT
17#define ROO_FIRST_MOMENT
18
19#include "RooAbsMoment.h"
20#include "RooRealProxy.h"
21#include "RooSetProxy.h"
22
23
24class RooRealVar;
25class RooArgList ;
26
28public:
29
31 RooFirstMoment(const char *name, const char *title, RooAbsReal& func, RooRealVar& x) ;
32 RooFirstMoment(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, const RooArgSet& nset, Bool_t intNSet=kFALSE) ;
33 virtual ~RooFirstMoment() ;
34
35 RooFirstMoment(const RooFirstMoment& other, const char* name = 0);
36 virtual TObject* clone(const char* newname) const { return new RooFirstMoment(*this, newname); }
37
38 const RooAbsReal& xF() { return _xf.arg() ; }
39 const RooAbsReal& ixF() { return _ixf.arg() ; }
40 const RooAbsReal& iF() { return _if.arg() ; }
41
42protected:
43
44 RooRealProxy _xf ; // X*F
45 RooRealProxy _ixf ; // Int(X*F(X))dx ;
46 RooRealProxy _if ; // Int(F(x))dx ;
47 Double_t evaluate() const;
48
49 ClassDef(RooFirstMoment,1) // Representation of moment in a RooAbsReal in a given RooRealVar
50};
51
52#endif
const Bool_t kFALSE
Definition: RtypesCore.h:88
bool Bool_t
Definition: RtypesCore.h:59
double Double_t
Definition: RtypesCore.h:55
#define ClassDef(name, id)
Definition: Rtypes.h:324
RooAbsMoment represents the first, second, or third order derivative of any RooAbsReal as calculated ...
Definition: RooAbsMoment.h:27
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
RooFirstMoment represents the first, second, or third order derivative of any RooAbsReal as calculate...
const RooAbsReal & ixF()
const RooAbsReal & xF()
RooRealProxy _xf
RooFirstMoment()
Default constructor.
virtual TObject * clone(const char *newname) const
RooRealProxy _ixf
virtual ~RooFirstMoment()
Destructor.
Double_t evaluate() const
Calculate value
const RooAbsReal & iF()
RooRealProxy _if
RooRealProxy is the concrete proxy for RooAbsReal objects A RooRealProxy is the general mechanism to ...
Definition: RooRealProxy.h:23
const RooAbsReal & arg() const
Definition: RooRealProxy.h:43
RooRealVar represents a fundamental (non-derived) real valued object.
Definition: RooRealVar.h:36
Mother of all ROOT objects.
Definition: TObject.h:37
Double_t x[n]
Definition: legend1.C:17