source: trunk/MagicSoft/Mars/mhflux/MAlphaFitter.h@ 7683

Last change on this file since 7683 was 7618, checked in by tbretz, 19 years ago
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1#ifndef MARS_MAlphaFitter
2#define MARS_MAlphaFitter
3
4#ifndef MARS_MParContainer
5#include "MParContainer.h"
6#endif
7
8#ifndef ROOT_TArrayD
9#include <TArrayD.h>
10#endif
11
12#ifndef ROOT_TF1
13#include <TF1.h>
14#endif
15
16class TH1D;
17class TH3D;
18
19class MAlphaFitter : public MParContainer
20{
21public:
22 enum ScaleMode_t {
23 kNone, // No scaling
24 kEntries, // scale by the number of entries in on and off
25 kIntegral, // scale by the integral in on and off
26 kOffRegion, // scale by the integral between fScaleMin, fScaleMax in on and off
27 kBackground, // scale by the integral between fBgMin, fBgMax in on and off
28 kLeastSquare, // not yet implemented
29 kUserScale // scale by fixed factor set by SetScaleUser
30 };
31 enum Strategy_t {
32 kSignificance,
33 kSignificanceChi2,
34 kSignificanceLogExcess,
35 kSignificanceExcess,
36 kExcess,
37 kGaussSigma,
38 kWeakSource
39 };
40 enum SignalFunc_t {
41 kGauss, kThetaSq
42 };
43
44private:
45 // Fitting Setup
46 Float_t fSigInt; // minimum of range to fit the signal
47 Float_t fSigMax; // maximum of range to fit the signal
48 Float_t fBgMin; // minimum of range to fit the background
49 Float_t fBgMax; // minimum of range to fit the background
50 Float_t fScaleMin; // minimum of range to determin the scale factor of the background
51 Float_t fScaleMax; // maximum of range to determin the scale factor of the background
52 Int_t fPolynomOrder; // order of polyom to be fitted to the background
53 Bool_t fFitBackground; // Backround fit: yes/no
54 SignalFunc_t fSignalFunc; // Type of signal function
55 // Result
56 Double_t fSignificance; // significance of an unknown signal (Li/Ma 17)
57 Double_t fSignificanceExc; // significance of a known excess (Li/Ma 5)
58 Double_t fEventsExcess; // calculated number of excess events (signal-bg)
59 Double_t fEventsSignal; // calculated number of signal events
60 Double_t fEventsBackground; // calculated number of bg events (fScaleFactor already applied)
61
62 Double_t fChiSqSignal; // Reduced (chi^2/NDF) chisq of signal fit
63 Double_t fChiSqBg; // Reduced (chi^2/NDF) chisq of bg fit
64 Double_t fIntegralMax; // Calculated bin border to which it was integrated
65 Double_t fScaleFactor; // Scale factor determined for off-data
66
67 TArrayD fCoefficients; // Fit result
68
69 // Function
70 TF1 *fFunc; // fit function (gauss + polynom)
71
72 // Scaling setup
73 ScaleMode_t fScaleMode; // scaling mode
74 Double_t fScaleUser; // user scale factor
75
76 // Minimization strategy
77 Strategy_t fStrategy; // How to calc minimization value
78
79public:
80 // Implementing the function yourself is only about 5% faster
81 MAlphaFitter(const char *name=0, const char *title=0) : fSigInt(15),
82 fSigMax(75), fBgMin(45), fBgMax(85), fScaleMin(40), fScaleMax(80),
83 fPolynomOrder(2), fFitBackground(kTRUE), fSignalFunc(kGauss),
84 fCoefficients(3+fPolynomOrder+1),
85 fFunc(new TF1("", Form("gaus(0) + pol%d(3)", fPolynomOrder), 0, 90)),
86 fScaleMode(kOffRegion), fScaleUser(1), fStrategy(kSignificance)
87 {
88 fName = name ? name : "MAlphaFitter";
89 fTitle = title ? title : "Fit alpha";
90
91 fFunc->SetName("Dummy");
92 gROOT->GetListOfFunctions()->Remove(fFunc);
93
94 Clear();
95 }
96
97 MAlphaFitter(const MAlphaFitter &f) : fFunc(0)
98 {
99 f.Copy(*this);
100 }
101 ~MAlphaFitter()
102 {
103 delete fFunc;
104 }
105
106 // TObject
107 void Clear(Option_t *o="");
108 void Print(Option_t *o="") const; //*MENU*
109 void Copy(TObject &o) const;
110
111 // Setter
112 void SetScaleUser(Float_t scale) { fScaleUser = scale; fScaleMode=kUserScale; }
113 void SetScaleMode(ScaleMode_t mode) { fScaleMode = mode; }
114 void SetMinimizationStrategy(Strategy_t mode) { fStrategy = mode; }
115 void SetSignalIntegralMax(Float_t s) { fSigInt = s; }
116 void SetSignalFitMax(Float_t s) { fSigMax = s; }
117 void SetBackgroundFitMin(Float_t s) { fBgMin = s; }
118 void SetBackgroundFitMax(Float_t s) { fBgMax = s; }
119 void SetScaleMin(Float_t s) { fScaleMin = s; }
120 void SetScaleMax(Float_t s) { fScaleMax = s; }
121 void SetPolynomOrder(Int_t s)
122 {
123 if (s==fPolynomOrder)
124 return;
125
126 fPolynomOrder = s;
127
128 SetSignalFunction(fSignalFunc);
129 }
130 void SetSignalFunction(SignalFunc_t func)
131 {
132 delete fFunc;
133 switch (func)
134 {
135 case kGauss:
136 fFunc=new TF1 ("", Form("gaus(0) + pol%d(3)", fPolynomOrder));
137 break;
138 case kThetaSq:
139// if (fPolynomOrder==0)
140// fFunc=new TF1("", "[0]*exp(-0.5*((sqrt(x)-[1])/[2])^2) + pol0(3)");
141// else
142 // {
143 if (fPolynomOrder>0)
144 fPolynomOrder = 1;
145 fFunc=new TF1("", "[0]*exp(-0.5*((sqrt(x)-[1])/[2])^2) + expo(3)");
146// }
147 break;
148 }
149 fSignalFunc=func;
150 fFunc->SetName("Dummy");
151 gROOT->GetListOfFunctions()->Remove(fFunc);
152 fCoefficients.Set(3+fPolynomOrder+1);
153 fCoefficients.Reset();
154 }
155 void EnableBackgroundFit(Bool_t b=kTRUE) { fFitBackground=b; }
156
157 // Getter
158 Double_t GetSignalIntegralMax() const { return fSigInt; }
159
160 Double_t GetEventsExcess() const { return fEventsExcess; }
161 Double_t GetEventsSignal() const { return fEventsSignal; }
162 Double_t GetEventsBackground() const { return fEventsBackground; }
163
164 Double_t GetSignificance() const { return fSignificance; }
165 Double_t GetSignificanceExc() const { return fSignificanceExc; }
166 Double_t GetChiSqSignal() const { return fChiSqSignal; }
167 Double_t GetChiSqBg() const { return fChiSqBg; }
168 Double_t GetScaleFactor() const { return fScaleFactor; }
169 Double_t GetMinimizationValue() const;
170
171 Double_t GetGausSigma() const { return fCoefficients[2]; }
172 Double_t GetGausMu() const { return fCoefficients[1]; }
173 Double_t GetGausA() const { return fCoefficients[0]; }
174 Double_t GetCoefficient(Int_t i) const { return fCoefficients[i]; }
175 const TArrayD &GetCoefficients() const { return fCoefficients; }
176 Double_t Eval(Double_t d) const { return fFunc ? fFunc->Eval(d) : 0; }
177
178 Double_t CalcUpperLimit() const;
179
180 // Interface to fit
181 Bool_t Fit(TH1D &h, Bool_t paint=kFALSE);
182 Bool_t Fit(const TH1D &on, const TH1D &off, Double_t alpha, Bool_t paint=kFALSE);
183 Bool_t Fit(TH1D &on, TH1D *off, Double_t alpha, Bool_t paint=kFALSE)
184 {
185 return off ? Fit(on, *off, alpha, paint) : Fit(on, paint);
186 }
187 Bool_t Fit(TH1D &on, TH1D *off, Bool_t paint=kFALSE)
188 {
189 return off ? Fit(on, *off, 1, paint) : Fit(on, paint);
190 }
191 Bool_t ScaleAndFit(TH1D &on, TH1D *off, Bool_t paint=kFALSE)
192 {
193 const Double_t alpha = off ? Scale(*off, on) : 1;
194 return off ? Fit(on, *off, alpha, paint) : Fit(on, paint);
195 }
196
197 Bool_t FitAlpha(const TH3D &h, Bool_t paint=kFALSE);
198 Bool_t FitEnergy(const TH3D &h, UInt_t bin, Bool_t paint=kFALSE);
199 Bool_t FitTheta(const TH3D &h, UInt_t bin, Bool_t paint=kFALSE);
200 //Bool_t FitTime(const TH3D &h, UInt_t bin, Bool_t paint=kFALSE);
201
202 Bool_t FitAlpha(const TH3D &on, const TH3D &off, Bool_t paint=kFALSE);
203 Bool_t FitEnergy(const TH3D &on, const TH3D &off, UInt_t bin, Bool_t paint=kFALSE);
204 Bool_t FitTheta(const TH3D &on, const TH3D &off, UInt_t bin, Bool_t paint=kFALSE);
205 //Bool_t FitTime(const TH3D &on, const TH3D &off, UInt_t bin, Bool_t paint=kFALSE);
206
207 Bool_t FitAlpha(const TH3D &on, const TH3D *off, Bool_t paint=kFALSE)
208 {
209 return off ? FitAlpha(on, *off, paint) : FitAlpha(on, paint);
210 }
211 Bool_t FitEnergy(const TH3D &on, const TH3D *off, UInt_t bin, Bool_t paint=kFALSE)
212 {
213 return off ? FitEnergy(on, *off, bin, paint) : FitEnergy(on, bin, paint);
214 }
215 Bool_t FitTheta(const TH3D &on, const TH3D *off, UInt_t bin, Bool_t paint=kFALSE)
216 {
217 return off ? FitTheta(on, *off, bin, paint) : FitTheta(on, bin, paint);
218 }/*
219 Bool_t FitTime(const TH3D &on, const TH3D *off, UInt_t bin, Bool_t paint=kFALSE)
220 {
221 return off ? FitTime(on, *off, bin, paint) : FitTime(on, bin, paint);
222 }*/
223
224 Double_t Scale(TH1D &off, const TH1D &on) const;
225
226 // Interface to result
227 void PaintResult(Float_t x=0.04, Float_t y=0.94, Float_t size=0.035) const;
228
229 // MTask
230 Int_t ReadEnv(const TEnv &env, TString prefix, Bool_t print=kFALSE);
231
232 ClassDef(MAlphaFitter, 2)
233};
234
235#endif
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