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RooDerivative.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_DERIVATIVE
17#define ROO_DERIVATIVE
18
19#include "RooAbsReal.h"
20#include "RooRealProxy.h"
21#include "RooSetProxy.h"
22
23
26
27
28class RooRealVar;
29class RooArgList ;
30
31class RooDerivative : public RooAbsReal {
32public:
33
35 RooDerivative(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, Int_t order=1, Double_t eps=0.001) ;
36 RooDerivative(const char *name, const char *title, RooAbsReal& func, RooRealVar& x, const RooArgSet& nset, Int_t order=1, Double_t eps=0.001) ;
37 virtual ~RooDerivative() ;
38
39 RooDerivative(const RooDerivative& other, const char* name = 0);
40 virtual TObject* clone(const char* newname) const { return new RooDerivative(*this, newname); }
41
42 Int_t order() const { return _order ; }
43 Double_t eps() const { return _eps ; }
44 void setEps(Double_t e) { _eps = e ; }
45
46 Bool_t redirectServersHook(const RooAbsCollection& /*newServerList*/, Bool_t /*mustReplaceAll*/, Bool_t /*nameChange*/, Bool_t /*isRecursive*/) ;
47
48protected:
49
50 Int_t _order ; // Derivation order
51 Double_t _eps ; // Precision
52 RooSetProxy _nset ; // Normalization set (optional)
53 RooRealProxy _func ; // Input function
54 RooRealProxy _x ; // Observable
55 mutable RooFunctor* _ftor ; //! Functor binding of RooAbsReal
56 mutable ROOT::Math::RichardsonDerivator *_rd ; //! Derivator
57
58 Double_t evaluate() const;
59
60 ClassDef(RooDerivative,1) // Representation of derivative of any RooAbsReal
61};
62
63#endif
#define e(i)
Definition: RSha256.hxx:103
int Int_t
Definition: RtypesCore.h:43
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
User class for calculating the derivatives of a function.
RooAbsCollection is an abstract container object that can hold multiple RooAbsArg objects.
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
RooDerivative represents the first, second, or third order derivative of any RooAbsReal as calculated...
Definition: RooDerivative.h:31
virtual ~RooDerivative()
Destructor.
void setEps(Double_t e)
Definition: RooDerivative.h:44
Int_t order() const
Definition: RooDerivative.h:42
Double_t eps() const
Definition: RooDerivative.h:43
Double_t _eps
Definition: RooDerivative.h:51
ROOT::Math::RichardsonDerivator * _rd
Functor binding of RooAbsReal.
Definition: RooDerivative.h:56
RooFunctor * _ftor
Definition: RooDerivative.h:55
Double_t evaluate() const
Derivator
RooDerivative()
Default constructor.
RooSetProxy _nset
Definition: RooDerivative.h:52
Bool_t redirectServersHook(const RooAbsCollection &, Bool_t, Bool_t, Bool_t)
Zap functor and derivator ;.
RooRealProxy _func
Definition: RooDerivative.h:53
RooRealProxy _x
Definition: RooDerivative.h:54
virtual TObject * clone(const char *newname) const
Definition: RooDerivative.h:40
Lightweight interface adaptor that exports a RooAbsPdf as a functor.
Definition: RooFunctor.h:25
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:35
RooSetProxy is the concrete proxy for RooArgSet objects.
Definition: RooSetProxy.h:24
Mother of all ROOT objects.
Definition: TObject.h:37
Double_t x[n]
Definition: legend1.C:17