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RooSecondMoment.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_SECOND_MOMENT
17#define ROO_SECOND_MOMENT
18
19#include "RooAbsMoment.h"
20#include "RooRealProxy.h"
21#include "RooSetProxy.h"
22
23
24class RooRealVar;
25class RooArgList ;
26
28public:
29
31 RooSecondMoment(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, Bool_t central=kFALSE, Bool_t takeRoot=kFALSE) ;
32 RooSecondMoment(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, const RooArgSet& nset, Bool_t central=kFALSE, Bool_t takeRoot=kFALSE, Bool_t intNSet=kFALSE) ;
33 virtual ~RooSecondMoment() ;
34
35 RooSecondMoment(const RooSecondMoment& other, const char* name = 0);
36 virtual TObject* clone(const char* newname) const { return new RooSecondMoment(*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-offset)*F
45 RooRealProxy _ixf ; // Int((X-offset)*F(X))dx ;
46 RooRealProxy _if ; // Int(F(x))dx ;
47 Double_t _xfOffset ; // offset
48 Double_t evaluate() const;
49
50 ClassDef(RooSecondMoment,1) // Representation of moment in a RooAbsReal in a given RooRealVar
51};
52
53#endif
const Bool_t kFALSE
Definition: RtypesCore.h:90
bool Bool_t
Definition: RtypesCore.h:61
double Double_t
Definition: RtypesCore.h:57
#define ClassDef(name, id)
Definition: Rtypes.h:322
char name[80]
Definition: TGX11.cxx:109
RooAbsMoment represents the first, second, or third order derivative of any RooAbsReal as calculated ...
Definition: RooAbsMoment.h:27
Bool_t central() const
Definition: RooAbsMoment.h:36
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:60
RooArgList is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgList.h:21
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:28
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:35
RooSecondMoment represents the first, second, or third order derivative of any RooAbsReal as calculat...
const RooAbsReal & ixF()
RooRealProxy _ixf
const RooAbsReal & iF()
virtual TObject * clone(const char *newname) const
RooRealProxy _if
Double_t evaluate() const
Calculate value
const RooAbsReal & xF()
virtual ~RooSecondMoment()
Destructor.
RooSecondMoment()
Default constructor.
RooRealProxy _xf
const T & arg() const
Return reference to object held in proxy.
Mother of all ROOT objects.
Definition: TObject.h:37
Double_t x[n]
Definition: legend1.C:17