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RooAbsMoment.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_ABS_MOMENT
17 #define ROO_ABS_MOMENT
18 
19 #include "RooAbsReal.h"
20 #include "RooRealProxy.h"
21 #include "RooSetProxy.h"
22 
23 
24 class RooRealVar;
25 class RooArgList ;
26 
27 class RooAbsMoment : public RooAbsReal {
28 public:
29 
30  RooAbsMoment() ;
31  RooAbsMoment(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, Int_t order=1, Bool_t takeRoot=kFALSE) ;
32  RooAbsMoment(const RooAbsMoment& other, const char* name = 0);
33  virtual ~RooAbsMoment() ;
34 
35  Int_t order() const { return _order ; }
36  Bool_t central() const { return _mean.absArg() ? kTRUE : kFALSE ; }
37  RooAbsReal* mean() { return (RooAbsReal*) _mean.absArg() ; }
38 
39 
40 protected:
41 
42  Int_t _order ; // Moment order
43  Int_t _takeRoot ; // Return n-order root of moment
44  RooSetProxy _nset ; // Normalization set (optional)
45  RooRealProxy _func ; // Input function
46  RooRealProxy _x ; // Observable
47  RooRealProxy _mean ; // Mean (if calculated for central moment)
48 
49  ClassDef(RooAbsMoment,1) // Abstract representation of moment in a RooAbsReal in a given RooRealVar
50 };
51 
52 #endif
kTRUE
const Bool_t kTRUE
Definition: RtypesCore.h:91
RooAbsMoment::_nset
RooSetProxy _nset
Definition: RooAbsMoment.h:44
RooAbsReal.h
RooAbsMoment::_mean
RooRealProxy _mean
Definition: RooAbsMoment.h:47
RooSetProxy
RooSetProxy is the concrete proxy for RooArgSet objects.
Definition: RooSetProxy.h:23
RooArgList
RooArgList is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgList.h:21
x
Double_t x[n]
Definition: legend1.C:17
RooAbsReal
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:61
RooAbsMoment
RooAbsMoment represents the first, second, or third order derivative of any RooAbsReal as calculated ...
Definition: RooAbsMoment.h:27
RooSetProxy.h
bool
RooAbsMoment::~RooAbsMoment
virtual ~RooAbsMoment()
Destructor.
Definition: RooAbsMoment.cxx:94
RooAbsMoment::_order
Int_t _order
Definition: RooAbsMoment.h:42
RooAbsMoment::_takeRoot
Int_t _takeRoot
Definition: RooAbsMoment.h:43
RooAbsMoment::mean
RooAbsReal * mean()
Definition: RooAbsMoment.h:37
RooAbsMoment::RooAbsMoment
RooAbsMoment()
Default constructor.
Definition: RooAbsMoment.cxx:56
RooArgProxy::absArg
RooAbsArg * absArg() const
Definition: RooArgProxy.h:37
kFALSE
const Bool_t kFALSE
Definition: RtypesCore.h:92
RooRealProxy.h
RooAbsMoment::_func
RooRealProxy _func
Definition: RooAbsMoment.h:45
RooTemplateProxy< RooAbsReal >
ClassDef
#define ClassDef(name, id)
Definition: Rtypes.h:325
name
char name[80]
Definition: TGX11.cxx:110
RooAbsMoment::_x
RooRealProxy _x
Definition: RooAbsMoment.h:46
RooRealVar
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:37
RooAbsMoment::order
Int_t order() const
Definition: RooAbsMoment.h:35
RooAbsMoment::central
Bool_t central() const
Definition: RooAbsMoment.h:36
int