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RooLinearVar.h
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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
18
19#include <cmath>
20#include <cfloat>
21#include <string>
22#include <list>
23#include "RooAbsRealLValue.h"
24#include "RooRealProxy.h"
25#include "RooFormula.h"
26#include "RooLinTransBinning.h"
27
28class RooArgSet ;
29
31public:
32 // Constructors, assignment etc.
34 RooLinearVar(const char *name, const char *title, RooAbsRealLValue& variable, const RooAbsReal& slope, const RooAbsReal& offset, const char *unit= "") ;
35 RooLinearVar(const RooLinearVar& other, const char* name=0);
36 virtual TObject* clone(const char* newname) const { return new RooLinearVar(*this,newname); }
37 virtual ~RooLinearVar() ;
38
39 // Parameter value and error accessors
40 virtual void setVal(Double_t value) ;
41
42 // Jacobian and limits
43 virtual Bool_t hasBinning(const char* name) const ;
44 virtual const RooAbsBinning& getBinning(const char* name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) const ;
45 virtual RooAbsBinning& getBinning(const char* name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) ;
46 virtual std::list<std::string> getBinningNames() const;
47
48 virtual Double_t jacobian() const ;
49 virtual Bool_t isJacobianOK(const RooArgSet& depList) const ;
50
51 // I/O streaming interface (machine readable)
52 virtual Bool_t readFromStream(std::istream& is, Bool_t compact, Bool_t verbose=kFALSE) ;
53 virtual void writeToStream(std::ostream& os, Bool_t compact) const ;
54
55 // Printing interface (human readable)
56
57 using RooAbsRealLValue::operator= ;
59
60protected:
61
62 virtual Double_t evaluate() const ;
63
66 RooRealProxy _var ; // Input observable
67 RooRealProxy _slope ; // Slope of transformation
68 RooRealProxy _offset ; // Offset of transformation
69
70 ClassDef(RooLinearVar,1) // Lvalue linear transformation function
71};
72
73#endif
const Bool_t kFALSE
Definition: RtypesCore.h:101
bool Bool_t
Definition: RtypesCore.h:63
double Double_t
Definition: RtypesCore.h:59
const Bool_t kTRUE
Definition: RtypesCore.h:100
#define ClassDef(name, id)
Definition: Rtypes.h:325
RooAbsBinning is the abstract base class for RooRealVar binning definitions.
Definition: RooAbsBinning.h:26
RooAbsRealLValue is the common abstract base class for objects that represent a real value that may a...
virtual void setVal(Double_t value)=0
Set the current value of the object. Needs to be overridden by implementations.
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:61
virtual Double_t offset() const
Definition: RooAbsReal.h:369
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:35
RooLinTransBinning is a special binning implementation for RooLinearVar that transforms the binning o...
RooLinearVar is the most general form of a derived real-valued object that can be used by RooRealInte...
Definition: RooLinearVar.h:30
virtual const RooAbsBinning & getBinning(const char *name=0, Bool_t verbose=kTRUE, Bool_t createOnTheFly=kFALSE) const
Const version of getBinning()
RooRealProxy _slope
Definition: RooLinearVar.h:67
virtual void setVal(Double_t value)
Assign given value to linear transformation: sets input variable to (value-offset)/slope If slope is ...
RooLinkedList _altBinning
Definition: RooLinearVar.h:65
virtual Double_t jacobian() const
Return value of Jacobian associated with the transformation.
RooRealProxy _var
Definition: RooLinearVar.h:66
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,...
RooLinTransBinning _binning
Definition: RooLinearVar.h:64
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.
virtual Double_t evaluate() const
Calculate current value of this object
RooRealProxy _offset
Definition: RooLinearVar.h:68
virtual std::list< std::string > getBinningNames() const
Get a list of all binning names.
virtual void writeToStream(std::ostream &os, Bool_t compact) const
Write object contents to stream.
virtual TObject * clone(const char *newname) const
Definition: RooLinearVar.h:36
virtual ~RooLinearVar()
Destructor.
RooLinkedList is an collection class for internal use, storing a collection of RooAbsArg pointers in ...
Definition: RooLinkedList.h:37
Mother of all ROOT objects.
Definition: TObject.h:37
static const std::string name("name")