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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * File: $Id: RooLinearVar.h,v 1.19 2007/05/11 09:11:30 verkerke 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_LINEAR_VAR
17 #define ROO_LINEAR_VAR
19 #include <cmath>
20 #include <float.h>
21 #include "TString.h"
22 #include "RooAbsRealLValue.h"
23 #include "RooRealProxy.h"
24 #include "RooFormula.h"
25 #include "RooLinTransBinning.h"
27 class RooArgSet ;
30 public:
31  // Constructors, assignment etc.
32  RooLinearVar() {} ;
33  RooLinearVar(const char *name, const char *title, RooAbsRealLValue& variable, const RooAbsReal& slope, const RooAbsReal& offset, const char *unit= "") ;
34  RooLinearVar(const RooLinearVar& other, const char* name=0);
35  virtual TObject* clone(const char* newname) const { return new RooLinearVar(*this,newname); }
36  virtual ~RooLinearVar() ;
38  // Parameter value and error accessors
39  virtual void setVal(Double_t value) ;
41  // Jacobian and limits
42  virtual Bool_t hasBinning(const char* name) const ;
43  virtual const RooAbsBinning& getBinning(const char* name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) const ;
44  virtual RooAbsBinning& getBinning(const char* name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) ;
45  virtual std::list<std::string> getBinningNames() const;
47  virtual Double_t jacobian() const ;
48  virtual Bool_t isJacobianOK(const RooArgSet& depList) const ;
50  // I/O streaming interface (machine readable)
51  virtual Bool_t readFromStream(std::istream& is, Bool_t compact, Bool_t verbose=kFALSE) ;
52  virtual void writeToStream(std::ostream& os, Bool_t compact) const ;
54  // Printing interface (human readable)
56  using RooAbsRealLValue::operator= ;
59 protected:
61  virtual Double_t evaluate() const ;
65  RooRealProxy _var ; // Input observable
66  RooRealProxy _slope ; // Slope of transformation
67  RooRealProxy _offset ; // Offset of transformation
69  ClassDef(RooLinearVar,1) // Lvalue linear transformation function
70 };
72 #endif
virtual ~RooLinearVar()
RooRealProxy _slope
Definition: RooLinearVar.h:66
virtual Double_t evaluate() const
Calculate current value of this object.
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:28
virtual Bool_t readFromStream(std::istream &is, Bool_t compact, Bool_t verbose=kFALSE)
Read object contents from stream.
virtual Bool_t isJacobianOK(const RooArgSet &depList) const
Returns true if Jacobian term associated with current expression tree is indeed constant.
RooLinearVar is the most general form of a derived real-valued object that can be used by RooRealInte...
Definition: RooLinearVar.h:29
#define ClassDef(name, id)
Definition: Rtypes.h:326
virtual void writeToStream(std::ostream &os, Bool_t compact) const
Write object contents to stream.
virtual Double_t offset() const
Definition: RooAbsReal.h:343
RooLinkedList _altBinning
Definition: RooLinearVar.h:64
virtual const RooAbsBinning & getBinning(const char *name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) const
Const version of getBinning()
RooLinTransBinning is a special binning implementation for RooLinearVar that transforms the binning o...
virtual void setVal(Double_t value)
Assign given value to linear transformation: sets input variable to (value-offset)/slope If slope is ...
virtual Double_t jacobian() const
Return value of Jacobian associated with the transformation.
RooRealProxy _offset
Definition: RooLinearVar.h:67
virtual void setVal(Double_t value)=0
virtual TObject * clone(const char *newname) const
Definition: RooLinearVar.h:35
const Bool_t kFALSE
Definition: RtypesCore.h:88
RooLinkedList is an collection class for internal use, storing a collection of RooAbsArg pointers in ...
Definition: RooLinkedList.h:35
RooAbsBinning is the abstract base class for RooRealVar binning definitions This class defines the in...
Definition: RooAbsBinning.h:26
RooLinTransBinning _binning
Definition: RooLinearVar.h:63
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:59
virtual std::list< std::string > getBinningNames() const
Get a list of all binning names.
Mother of all ROOT objects.
Definition: TObject.h:37
RooRealProxy _var
Definition: RooLinearVar.h:65
RooAbsRealLValue is the common abstract base class for objects that represent a real value that may a...
virtual Bool_t hasBinning(const char *name) const
Returns true if binning with given name exists.If a given binning exists on the input variable...
const Bool_t kTRUE
Definition: RtypesCore.h:87
char name[80]
Definition: TGX11.cxx:109