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RooLinTransBinning.cxx
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * @(#)root/roofitcore:$Id$
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 
17 /**
18 \file RooLinTransBinning.cxx
19 \class RooLinTransBinning
20 \ingroup Roofitcore
21 
22 RooLinTransBinning is a special binning implementation for RooLinearVar
23 that transforms the binning of the RooLinearVar input variable in the same
24 way that RooLinearVar does
25 **/
26 
27 
28 #include "RooFit.h"
29 
30 #include "RooLinTransBinning.h"
31 
32 using namespace std;
33 
35 ;
36 
37 
38 
39 ////////////////////////////////////////////////////////////////////////////////
40 /// Constructor with a given input binning and the slope and offset to be applied to
41 /// construct the linear transformation
42 
43 RooLinTransBinning::RooLinTransBinning(const RooAbsBinning& input, Double_t slope, Double_t offset, const char* name) :
45 {
46  updateInput(input,slope,offset) ;
47 }
48 
49 
50 
51 ////////////////////////////////////////////////////////////////////////////////
52 /// Copy constructor
53 
56 {
57  _input = other._input ;
58  _slope = other._slope ;
59  _offset = other._offset ;
60 }
61 
62 
63 
64 ////////////////////////////////////////////////////////////////////////////////
65 /// Destructor
66 
68 {
69  if (_array) delete[] _array ;
70 }
71 
72 
73 
74 ////////////////////////////////////////////////////////////////////////////////
75 
77 {
78  // Change limits -- not implemented
79 }
80 
81 
82 ////////////////////////////////////////////////////////////////////////////////
83 /// Return array of bin boundaries
84 
86 {
87  const int n = numBoundaries();
88  // Return array with boundary values
89  if (_array) delete[] _array ;
90  _array = new Double_t[n] ;
91 
92  const double* inputArray = _input->array() ;
93 
94  if (_slope>0) {
95  for (int i=0; i < n; i++) {
96  _array[i] = trans(inputArray[i]) ;
97  }
98  } else {
99  for (int i=0; i < n; i++) {
100  _array[i] = trans(inputArray[n-i-1]) ;
101  }
102  }
103 
104  return _array;
105 }
106 
107 
108 
109 ////////////////////////////////////////////////////////////////////////////////
110 /// Update the slope and offset parameters and the pointer to the input binning
111 
113 {
114  _input = (RooAbsBinning*) &input ;
115  _slope = slope ;
116  _offset = offset ;
117 }
118 
virtual Double_t * array() const
Return array of bin boundaries.
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.
STL namespace.
RooAbsBinning * _input
RooLinTransBinning(const char *name=0)
virtual ~RooLinTransBinning()
Destructor.
Double_t trans(Double_t x) const
RooLinTransBinning is a special binning implementation for RooLinearVar that transforms the binning o...
virtual Int_t numBoundaries() const
RooAbsBinning is the abstract base class for RooRealVar binning definitions This class defines the in...
Definition: RooAbsBinning.h:26
#define ClassImp(name)
Definition: Rtypes.h:361
virtual void setRange(Double_t xlo, Double_t xhi)
virtual Double_t * array() const =0
const Int_t n
Definition: legend1.C:16
char name[80]
Definition: TGX11.cxx:109