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RooLinTransBinning.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitCore *
4 * File: $Id: RooLinTransBinning.h,v 1.9 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_LIN_TRANS_BINNING
17#define ROO_LIN_TRANS_BINNING
18
19#include "Rtypes.h"
20#include "RooAbsBinning.h"
21
23public:
24
26 RooLinTransBinning(const RooAbsBinning& input, Double_t slope=1.0, Double_t offset=0.0, const char* name=0);
27 RooLinTransBinning(const RooLinTransBinning&, const char* name=0);
28 virtual RooAbsBinning* clone(const char* name=0) const { return new RooLinTransBinning(*this,name) ; }
29 virtual ~RooLinTransBinning() ;
30
31 virtual Int_t numBoundaries() const { return _input->numBoundaries() ; }
32 virtual Int_t binNumber(Double_t x) const { return _input->binNumber(invTrans(x)) ; }
33 virtual Double_t binCenter(Int_t bin) const { return trans(_input->binCenter(binTrans(bin))) ; }
34 virtual Double_t binWidth(Int_t bin) const { return _slope*_input->binWidth(binTrans(bin)) ; }
35 virtual Double_t binLow(Int_t bin) const { if (_slope>0) return trans(_input->binLow(binTrans(bin))) ; else return trans(_input->binHigh(binTrans(bin))) ; }
36 virtual Double_t binHigh(Int_t bin) const { if (_slope>0) return trans(_input->binHigh(binTrans(bin))) ; else return trans(_input->binLow(binTrans(bin))) ; }
37
38 virtual void setRange(Double_t xlo, Double_t xhi) ;
39 virtual void setMin(Double_t xlo) { setRange(xlo,highBound()) ; }
40 virtual void setMax(Double_t xhi) { setRange(lowBound(),xhi) ; }
41
42 virtual Double_t lowBound() const { if (_slope>0) return trans(_input->lowBound()) ; else return trans(_input->highBound()) ; }
43 virtual Double_t highBound() const { if (_slope>0) return trans(_input->highBound()) ; else return trans(_input->lowBound()) ; }
44 virtual Double_t averageBinWidth() const { return _slope*_input->averageBinWidth() ; }
45
46 virtual Double_t* array() const ;
47
48 void updateInput(const RooAbsBinning& input, Double_t slope=1.0, Double_t offset=0.0) ;
49
50protected:
51
52 inline Int_t binTrans(Int_t bin) const { if (_slope>0) return bin ; else return numBins()-bin-1 ; }
53 inline Double_t trans(Double_t x) const { return x*_slope + _offset ; }
54 inline Double_t invTrans(Double_t x) const { if (_slope==0.) return 0 ; return (x-_offset)/_slope ; }
55
56 Double_t _slope{0.}; // Slope of transformation
57 Double_t _offset{0.}; // Offset of transformation
58 RooAbsBinning* _input{nullptr}; // Input binning
59 mutable Double_t *_array{nullptr}; //! Array of transformed bin boundaries
60
61 ClassDef(RooLinTransBinning,1) // Linear transformation of binning specification
62};
63
64#endif
int Int_t
Definition: RtypesCore.h:45
double Double_t
Definition: RtypesCore.h:59
#define ClassDef(name, id)
Definition: Rtypes.h:325
char name[80]
Definition: TGX11.cxx:110
RooAbsBinning is the abstract base class for RooRealVar binning definitions.
Definition: RooAbsBinning.h:26
virtual Double_t binLow(Int_t bin) const =0
Int_t numBins() const
Return number of bins.
Definition: RooAbsBinning.h:38
virtual Double_t binHigh(Int_t bin) const =0
virtual Double_t highBound() const =0
virtual Double_t binCenter(Int_t bin) const =0
virtual Int_t numBoundaries() const =0
virtual Int_t binNumber(Double_t x) const =0
virtual Double_t lowBound() const =0
virtual Double_t averageBinWidth() const =0
virtual Double_t binWidth(Int_t bin) const =0
RooLinTransBinning is a special binning implementation for RooLinearVar that transforms the binning o...
virtual Double_t binCenter(Int_t bin) const
RooAbsBinning * _input
virtual Double_t highBound() const
virtual ~RooLinTransBinning()
Destructor.
virtual Int_t numBoundaries() const
virtual Double_t binHigh(Int_t bin) const
Double_t invTrans(Double_t x) const
virtual void setRange(Double_t xlo, Double_t xhi)
void updateInput(const RooAbsBinning &input, Double_t slope=1.0, Double_t offset=0.0)
Update the slope and offset parameters and the pointer to the input binning.
virtual Double_t binWidth(Int_t bin) const
virtual void setMax(Double_t xhi)
Change upper bound to xhi.
virtual Double_t binLow(Int_t bin) const
virtual Double_t * array() const
Return array of bin boundaries.
virtual RooAbsBinning * clone(const char *name=0) const
virtual void setMin(Double_t xlo)
Change lower bound to xlo.
RooLinTransBinning(const char *name=0)
virtual Double_t averageBinWidth() const
Double_t trans(Double_t x) const
virtual Double_t lowBound() const
virtual Int_t binNumber(Double_t x) const
Int_t binTrans(Int_t bin) const
Double_t x[n]
Definition: legend1.C:17