source: trunk/MagicSoft/Mars/mhflux/MAlphaFitter.cc@ 8462

Last change on this file since 8462 was 8049, checked in by tbretz, 19 years ago
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1/* ======================================================================== *\
2!
3! *
4! * This file is part of MARS, the MAGIC Analysis and Reconstruction
5! * Software. It is distributed to you in the hope that it can be a useful
6! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
7! * It is distributed WITHOUT ANY WARRANTY.
8! *
9! * Permission to use, copy, modify and distribute this software and its
10! * documentation for any purpose is hereby granted without fee,
11! * provided that the above copyright notice appear in all copies and
12! * that both that copyright notice and this permission notice appear
13! * in supporting documentation. It is provided "as is" without express
14! * or implied warranty.
15! *
16!
17!
18! Author(s): Thomas Bretz, 3/2004 <mailto:tbretz@astro.uni-wuerzburg.de>
19!
20! Copyright: MAGIC Software Development, 2000-2004
21!
22!
23\* ======================================================================== */
24
25//////////////////////////////////////////////////////////////////////////////
26//
27// MAlphaFitter
28//
29// Create a single Alpha-Plot. The alpha-plot is fitted online. You can
30// check the result when it is filles in the MStatusDisplay
31// For more information see MHFalseSource::FitSignificance
32//
33// For convinience (fit) the output significance is stored in a
34// container in the parlisrt
35//
36// Version 2:
37// ----------
38// + Double_t fSignificanceExc; // significance of a known excess
39//
40// Version 3:
41// ----------
42// + TArrayD fErrors; // errors of coefficients
43//
44//
45//////////////////////////////////////////////////////////////////////////////
46#include "MAlphaFitter.h"
47
48#include <TF1.h>
49#include <TH1.h>
50#include <TH3.h>
51
52#include <TRandom.h>
53#include <TFeldmanCousins.h>
54
55#include <TLine.h>
56#include <TLatex.h>
57#include <TVirtualPad.h>
58
59#include "MMath.h"
60
61#include "MLogManip.h"
62
63ClassImp(MAlphaFitter);
64
65using namespace std;
66
67void MAlphaFitter::Clear(Option_t *o)
68{
69 fSignificance=0;
70 fSignificanceExc=0;
71 fEventsExcess=0;
72 fEventsSignal=0;
73 fEventsBackground=0;
74
75 fChiSqSignal=0;
76 fChiSqBg=0;
77 fIntegralMax=0;
78 fScaleFactor=1;
79
80 fCoefficients.Reset();
81 fErrors.Reset();
82}
83
84// --------------------------------------------------------------------------
85//
86// This function implementes the fit to the off-data as used in Fit()
87//
88Bool_t MAlphaFitter::FitOff(TH1D &h, Int_t paint)
89{
90 if (h.GetEntries()==0)
91 return kFALSE;
92
93 // First fit a polynom in the off region
94 fFunc->FixParameter(0, 0);
95 fFunc->FixParameter(1, 0);
96 fFunc->FixParameter(2, 1);
97 fFunc->ReleaseParameter(3);
98 if (fPolynomOrder!=1)
99 fFunc->FixParameter(4, 0);
100
101 for (int i=5; i<fFunc->GetNpar(); i++)
102 if (fFitBackground)
103 fFunc->ReleaseParameter(i);
104 else
105 fFunc->SetParameter(i, 0);
106
107 if (!fFitBackground)
108 return kTRUE;
109
110 if (fSignalFunc==kThetaSq)
111 {
112 const Double_t sum = h.Integral(1, 3)/3;
113 const Double_t a = sum<=1 ? 0 : TMath::Log(sum);
114 const Double_t b = -1.7;
115
116 // Do a best-guess
117 fFunc->SetParameter(3, a);
118 fFunc->SetParameter(4, b);
119 }
120
121 // options : N do not store the function, do not draw
122 // I use integral of function in bin rather than value at bin center
123 // R use the range specified in the function range
124 // Q quiet mode
125 // E Perform better Errors estimation using Minos technique
126 h.Fit(fFunc, "NQI", "", fBgMin, fBgMax);
127 fChiSqBg = fFunc->GetChisquare()/fFunc->GetNDF();
128
129 fCoefficients.Set(fFunc->GetNpar(), fFunc->GetParameters());
130 fErrors.Set(fFunc->GetNpar());
131 for (int i=3; i<fFunc->GetNpar(); i++)
132 fErrors[i] = fFunc->GetParError(i);
133
134 // ------------------------------------
135
136 if (paint)
137 {
138 if (paint==2)
139 {
140 fFunc->SetLineColor(kBlack);
141 fFunc->SetLineWidth(1);
142 }
143 else
144 {
145 fFunc->SetRange(0, 90);
146 fFunc->SetLineColor(kRed);
147 fFunc->SetLineWidth(2);
148 }
149 fFunc->Paint("same");
150 }
151
152 return kTRUE;
153}
154
155// --------------------------------------------------------------------------
156//
157// Calculate the result of the fit and set the corresponding data members
158//
159void MAlphaFitter::FitResult(const TH1D &h)
160{
161 const Double_t alphaw = h.GetXaxis()->GetBinWidth(1);
162
163 const Int_t bin = h.GetXaxis()->FindFixBin(fSigInt*0.999);
164
165 fIntegralMax = h.GetBinLowEdge(bin+1);
166 fEventsBackground = fFunc->Integral(0, fIntegralMax)/alphaw;
167 fEventsSignal = h.Integral(1, bin);
168 fEventsExcess = fEventsSignal-fEventsBackground;
169 fSignificance = MMath::SignificanceLiMaSigned(fEventsSignal, fEventsBackground);
170 fSignificanceExc = MMath::SignificanceLiMaExc(fEventsSignal, fEventsBackground);
171
172 // !Finitite includes IsNaN
173 if (!TMath::Finite(fSignificance))
174 fSignificance=0;
175
176 if (fEventsExcess<0)
177 fEventsExcess=0;
178}
179
180// --------------------------------------------------------------------------
181//
182// This is a preliminary implementation of a alpha-fit procedure for
183// all possible source positions. It will be moved into its own
184// more powerfull class soon.
185//
186// The fit function is "gaus(0)+pol2(3)" which is equivalent to:
187// [0]*exp(-0.5*((x-[1])/[2])^2) + [3] + [4]*x + [5]*x^2
188// or
189// A*exp(-0.5*((x-mu)/sigma)^2) + a + b*x + c*x^2
190//
191// Parameter [1] is fixed to 0 while the alpha peak should be
192// symmetric around alpha=0.
193//
194// Parameter [4] is fixed to 0 because the first derivative at
195// alpha=0 should be 0, too.
196//
197// In a first step the background is fitted between bgmin and bgmax,
198// while the parameters [0]=0 and [2]=1 are fixed.
199//
200// In a second step the signal region (alpha<sigmax) is fittet using
201// the whole function with parameters [1], [3], [4] and [5] fixed.
202//
203// The number of excess and background events are calculated as
204// s = int(hist, 0, 1.25*sigint)
205// b = int(pol2(3), 0, 1.25*sigint)
206//
207// The Significance is calculated using the Significance() member
208// function.
209//
210Bool_t MAlphaFitter::Fit(TH1D &h, Bool_t paint)
211{
212 Clear();
213
214 // Check for the region which is not filled...
215 // if (alpha0==0)
216 // return kFALSE;
217
218 // Perform fit to the off-data
219 if (!FitOff(h, paint))
220 return kFALSE;
221
222 fFunc->ReleaseParameter(0); // It is also released by SetParLimits later on
223 //func.ReleaseParameter(1); // It is also released by SetParLimits later on
224 fFunc->ReleaseParameter(2);
225 for (int i=3; i<fFunc->GetNpar(); i++)
226 fFunc->FixParameter(i, fFunc->GetParameter(i));
227
228
229 // Do not allow signals smaller than the background
230 const Double_t alpha0 = h.GetBinContent(1);
231 const Double_t s = fSignalFunc==kGauss ? fFunc->GetParameter(3) : TMath::Exp(fFunc->GetParameter(3));
232 const Double_t A = alpha0-s;
233 //const Double_t dA = TMath::Abs(A);
234 //fFunc->SetParLimits(0, -dA*4, dA*4); // SetParLimits also releases the parameter
235 fFunc->SetParLimits(2, 0, 90); // SetParLimits also releases the parameter
236
237 // Now fit a gaus in the on region on top of the polynom
238 fFunc->SetParameter(0, A);
239 fFunc->SetParameter(2, fSigMax*0.75);
240
241 // options : N do not store the function, do not draw
242 // I use integral of function in bin rather than value at bin center
243 // R use the range specified in the function range
244 // Q quiet mode
245 // E Perform better Errors estimation using Minos technique
246 h.Fit(fFunc, "NQI", "", 0, fSigMax);
247
248 fChiSqSignal = fFunc->GetChisquare()/fFunc->GetNDF();
249 fCoefficients.Set(fFunc->GetNpar(), fFunc->GetParameters());
250 for (int i=0; i<3; i++)
251 fErrors[i] = fFunc->GetParError(i);
252 //const Bool_t ok = NDF>0 && chi2<2.5*NDF;
253
254 // ------------------------------------
255 if (paint)
256 {
257 fFunc->SetLineColor(kGreen);
258 fFunc->SetLineWidth(2);
259 fFunc->Paint("same");
260 }
261 // ------------------------------------
262
263 //const Double_t s = fFunc->Integral(0, fSigInt)/alphaw;
264 fFunc->SetParameter(0, 0);
265 fFunc->SetParameter(2, 1);
266 //const Double_t b = fFunc->Integral(0, fSigInt)/alphaw;
267 //fSignificance = MMath::SignificanceLiMaSigned(s, b);
268
269 // Calculate the fit result and set the corresponding data members
270 FitResult(h);
271
272 return kTRUE;
273}
274
275Double_t MAlphaFitter::DoOffFit(const TH1D &hon, const TH1D &hof, Bool_t paint)
276{
277 if (fSignalFunc!=kThetaSq)
278 return 0;
279
280 // ----------------------------------------------------------------------------
281
282 const Int_t bin = hon.GetXaxis()->FindFixBin(fSigInt*0.999);
283
284
285 MAlphaFitter fit(*this);
286 fit.EnableBackgroundFit();
287 fit.SetBackgroundFitMin(0);
288
289 // produce a histogram containing the off-samples from on-source and
290 // off-source in the off-source region and the on-data in the source-region
291 TH1D h(hof);
292 h.Add(&hon);
293 h.Scale(0.5);
294 for (int i=1; i<=bin+3; i++)
295 {
296 h.SetBinContent(i, hof.GetBinContent(i));
297 h.SetBinError( i, hof.GetBinError(i));
298 }
299
300 // Now fit the off-data
301 if (!fit.FitOff(h, paint?2:0)) // FIXME: Show fit!
302 return -1;
303
304 // Calculate fit-result
305 fit.FitResult(h);
306
307 // Do a gaussian error propagation to calculated the error of
308 // the background estimated from the fit
309 const Double_t ea = fit.GetErrors()[3];
310 const Double_t eb = fit.GetErrors()[4];
311 const Double_t a = fit.GetCoefficients()[3];
312 const Double_t b = fit.GetCoefficients()[4];
313
314 const Double_t t = fIntegralMax;
315
316 const Double_t ex = TMath::Exp(t*b);
317 const Double_t eab = TMath::Exp(a)/b;
318
319 const Double_t eA = ex-1;
320 const Double_t eB = t*ex - eA/b;
321
322 const Double_t w = h.GetXaxis()->GetBinWidth(1);
323
324 // Error of estimated background
325 const Double_t er = TMath::Abs(eab)*TMath::Hypot(eA*ea, eB*eb)/w;
326
327 // Calculate arbitrary scale factor from propagated error from the
328 // condition: sqrt(alpha*background) = est.background/est.error
329 // const Double_t bg = hof.Integral(1, bin);
330 // const Double_t sc = bg * er*er / (fit2.GetEventsBackground()*fit2.GetEventsBackground());
331 // Assuming that bg and fit2.GetEventsBackground() are rather identical:
332 const Double_t sc = er*er / fit.GetEventsBackground();
333 /*
334 cout << MMath::SignificanceLiMaSigned(hon.Integral(1, bin), fit.GetEventsBackground()/sc, sc) << " ";
335 cout << sc << " ";
336 cout << fit.fChiSqBg << endl;
337 */
338 return sc;
339}
340
341Bool_t MAlphaFitter::Fit(const TH1D &hon, const TH1D &hof, Double_t alpha, Bool_t paint)
342{
343 TH1D h(hon);
344 h.Add(&hof, -1); // substracts also number of entries!
345 h.SetEntries(hon.GetEntries());
346
347 MAlphaFitter fit(*this);
348 fit.SetPolynomOrder(0);
349 if (alpha<=0 || !fit.Fit(h, paint))
350 return kFALSE;
351
352 fChiSqSignal = fit.GetChiSqSignal();
353 fChiSqBg = fit.GetChiSqBg();
354 fCoefficients = fit.GetCoefficients();
355 fErrors = fit.GetErrors();
356
357
358 // ----------------------------------------------------------------------------
359
360 const Double_t scale = DoOffFit(hon, hof, paint);
361 if (scale<0)
362 return kFALSE;
363
364 // ----------------------------------------------------------------------------
365
366 const Int_t bin = hon.GetXaxis()->FindFixBin(fSigInt*0.999);
367
368 fIntegralMax = hon.GetBinLowEdge(bin+1);
369 fEventsBackground = hof.Integral(1, bin);
370 fEventsSignal = hon.Integral(1, bin);
371 fEventsExcess = fEventsSignal-fEventsBackground;
372 fScaleFactor = alpha;
373 fSignificance = MMath::SignificanceLiMaSigned(fEventsSignal, fEventsBackground/alpha, alpha);
374 fSignificanceExc = MMath::SignificanceLiMaExc(fEventsSignal, fEventsBackground/alpha, alpha);
375
376 // !Finitite includes IsNaN
377 if (!TMath::Finite(fSignificance))
378 fSignificance=0;
379 if (fEventsExcess<0)
380 fEventsExcess=0;
381
382 return kTRUE;
383}
384
385// --------------------------------------------------------------------------
386//
387// Calculate the upper limit for fEventsSignal number of observed events
388// and fEventsBackground number of background events.
389//
390// Therefor TFeldmanCousin is used.
391//
392// The Feldman-Cousins method as described in PRD V57 #7, p3873-3889
393//
394Double_t MAlphaFitter::CalcUpperLimit() const
395{
396 // get a FeldmanCousins calculation object with the default limits
397 // of calculating a 90% CL with the minimum signal value scanned
398 // = 0.0 and the maximum signal value scanned of 50.0
399 TFeldmanCousins f;
400 f.SetMuStep(0.05);
401 f.SetMuMax(100);
402 f.SetMuMin(0);
403 f.SetCL(90);
404
405 return f.CalculateUpperLimit(fEventsSignal, fEventsBackground);
406}
407
408void MAlphaFitter::PaintResult(Float_t x, Float_t y, Float_t size, Bool_t draw) const
409{
410 const Double_t w = GetGausSigma();
411 const Double_t m = fIntegralMax;
412
413 const Int_t l1 = w<=0 ? 0 : (Int_t)TMath::Ceil(-TMath::Log10(w));
414 const Int_t l2 = m<=0 ? 0 : (Int_t)TMath::Ceil(-TMath::Log10(m));
415 const TString fmt = Form("\\sigma_{L/M}=%%.1f \\omega=%%.%df\\circ E=%%d B=%%d x<%%.%df \\tilde\\chi_{b}=%%.1f \\tilde\\chi_{s}=%%.1f c=%%.1f f=%%.2f",
416 l1<1?1:l1+1, l2<1?1:l2+1);
417 const TString txt = Form(fmt.Data(), fSignificance, w, (int)fEventsExcess,
418 (int)fEventsBackground, m, fChiSqBg, fChiSqSignal,
419 fCoefficients[3], fScaleFactor);
420
421 // This is totaly weired but the only way to get both options
422 // working with this nonsense implementation of TLatex
423 TLatex text(x, y, txt);
424 text.SetBit(TLatex::kTextNDC);
425 text.SetTextSize(size);
426 if (draw)
427 text.DrawLatex(x, y, txt);
428 else
429 text.Paint();
430
431 TLine line;
432 line.SetLineColor(14);
433 if (draw)
434 line.DrawLine(m, gPad->GetUymin(), m, gPad->GetUymax());
435 else
436 line.PaintLine(m, gPad->GetUymin(), m, gPad->GetUymax());
437}
438
439void MAlphaFitter::Copy(TObject &o) const
440{
441 MAlphaFitter &f = static_cast<MAlphaFitter&>(o);
442
443 // Setup
444 f.fSigInt = fSigInt;
445 f.fSigMax = fSigMax;
446 f.fBgMin = fBgMin;
447 f.fBgMax = fBgMax;
448 f.fScaleMin = fScaleMin;
449 f.fScaleMax = fScaleMax;
450 f.fPolynomOrder = fPolynomOrder;
451 f.fFitBackground= fFitBackground;
452 f.fSignalFunc = fSignalFunc;
453 f.fScaleMode = fScaleMode;
454 f.fScaleUser = fScaleUser;
455 f.fStrategy = fStrategy;
456 f.fCoefficients.Set(fCoefficients.GetSize());
457 f.fCoefficients.Reset();
458 f.fErrors.Set(fCoefficients.GetSize());
459 f.fErrors.Reset();
460
461 // Result
462 f.fSignificance = fSignificance;
463 f.fSignificanceExc = fSignificanceExc;
464 f.fEventsExcess = fEventsExcess;
465 f.fEventsSignal = fEventsSignal;
466 f.fEventsBackground = fEventsBackground;
467 f.fChiSqSignal = fChiSqSignal;
468 f.fChiSqBg = fChiSqBg;
469 f.fIntegralMax = fIntegralMax;
470 f.fScaleFactor = fScaleFactor;
471
472 // Function
473 TF1 *fcn = f.fFunc;
474 f.fFunc = new TF1(*fFunc);
475 f.fFunc->SetName("Dummy");
476 gROOT->GetListOfFunctions()->Remove(f.fFunc);
477 delete fcn;
478}
479
480void MAlphaFitter::Print(Option_t *o) const
481{
482 *fLog << GetDescriptor() << ": Fitting..." << endl;
483 *fLog << " ...signal to " << fSigMax << " (integrate into bin at " << fSigInt << ")" << endl;
484 *fLog << " ...signal function: ";
485 switch (fSignalFunc)
486 {
487 case kGauss: *fLog << "gauss(x)/pol" << fPolynomOrder; break;
488 case kThetaSq: *fLog << "gauss(sqrt(x))/expo"; break;
489 }
490 *fLog << endl;
491 if (!fFitBackground)
492 *fLog << " ...no background." << endl;
493 else
494 {
495 *fLog << " ...background from " << fBgMin << " to " << fBgMax << endl;
496 *fLog << " ...polynom order " << fPolynomOrder << endl;
497 *fLog << " ...scale mode: ";
498 switch (fScaleMode)
499 {
500 case kNone: *fLog << "none."; break;
501 case kEntries: *fLog << "entries."; break;
502 case kIntegral: *fLog << "integral."; break;
503 case kOffRegion: *fLog << "off region (integral between " << fScaleMin << " and " << fScaleMax << ")"; break;
504 case kBackground: *fLog << "background (integral between " << fBgMin << " and " << fBgMax << ")"; break;
505 case kLeastSquare: *fLog << "least square (N/A)"; break;
506 case kUserScale: *fLog << "user def (" << fScaleUser << ")"; break;
507 }
508 *fLog << endl;
509 }
510
511 if (TString(o).Contains("result"))
512 {
513 *fLog << "Result:" << endl;
514 *fLog << " - Significance (Li/Ma) " << fSignificance << endl;
515 *fLog << " - Excess Events " << fEventsExcess << endl;
516 *fLog << " - Signal Events " << fEventsSignal << endl;
517 *fLog << " - Background Events " << fEventsBackground << endl;
518 *fLog << " - Chi^2/ndf (Signal) " << fChiSqSignal << endl;
519 *fLog << " - Chi^2/ndf (Background) " << fChiSqBg << endl;
520 *fLog << " - Signal integrated up to " << fIntegralMax << "°" << endl;
521 *fLog << " - Scale Factor (Off) " << fScaleFactor << endl;
522 }
523}
524
525Bool_t MAlphaFitter::FitEnergy(const TH3D &hon, UInt_t bin, Bool_t paint)
526{
527 const TString name(Form("TempAlphaEnergy%06d", gRandom->Integer(1000000)));
528 TH1D *h = hon.ProjectionZ(name, -1, 9999, bin, bin, "E");
529 h->SetDirectory(0);
530
531 const Bool_t rc = Fit(*h, paint);
532 delete h;
533 return rc;
534}
535
536Bool_t MAlphaFitter::FitTheta(const TH3D &hon, UInt_t bin, Bool_t paint)
537{
538 const TString name(Form("TempAlphaTheta%06d", gRandom->Integer(1000000)));
539 TH1D *h = hon.ProjectionZ(name, bin, bin, -1, 9999, "E");
540 h->SetDirectory(0);
541
542 const Bool_t rc = Fit(*h, paint);
543 delete h;
544 return rc;
545}
546/*
547Bool_t MAlphaFitter::FitTime(const TH3D &hon, UInt_t bin, Bool_t paint)
548{
549 const TString name(Form("TempAlphaTime%06d", gRandom->Integer(1000000)));
550
551 hon.GetZaxis()->SetRange(bin,bin);
552 TH1D *h = (TH1D*)hon.Project3D("ye");
553 hon.GetZaxis()->SetRange(-1,9999);
554
555 h->SetDirectory(0);
556
557 const Bool_t rc = Fit(*h, paint);
558 delete h;
559 return rc;
560}
561*/
562Bool_t MAlphaFitter::FitAlpha(const TH3D &hon, Bool_t paint)
563{
564 const TString name(Form("TempAlpha%06d", gRandom->Integer(1000000)));
565 TH1D *h = hon.ProjectionZ(name, -1, 9999, -1, 9999, "E");
566 h->SetDirectory(0);
567
568 const Bool_t rc = Fit(*h, paint);
569 delete h;
570 return rc;
571}
572
573Bool_t MAlphaFitter::FitEnergy(const TH3D &hon, const TH3D &hof, UInt_t bin, Bool_t paint)
574{
575 const TString name1(Form("TempAlpha%06d_on", gRandom->Integer(1000000)));
576 const TString name0(Form("TempAlpha%06d_off", gRandom->Integer(1000000)));
577
578 TH1D *h1 = hon.ProjectionZ(name1, -1, 9999, bin, bin, "E");
579 TH1D *h0 = hof.ProjectionZ(name0, -1, 9999, bin, bin, "E");
580 h1->SetDirectory(0);
581 h0->SetDirectory(0);
582
583 const Bool_t rc = ScaleAndFit(*h1, h0, paint);
584
585 delete h0;
586 delete h1;
587
588 return rc;
589}
590
591Bool_t MAlphaFitter::FitTheta(const TH3D &hon, const TH3D &hof, UInt_t bin, Bool_t paint)
592{
593 const TString name1(Form("TempAlpha%06d_on", gRandom->Integer(1000000)));
594 const TString name0(Form("TempAlpha%06d_off", gRandom->Integer(1000000)));
595
596 TH1D *h1 = hon.ProjectionZ(name1, bin, bin, -1, 9999, "E");
597 TH1D *h0 = hof.ProjectionZ(name0, bin, bin, -1, 9999, "E");
598 h1->SetDirectory(0);
599 h0->SetDirectory(0);
600
601 const Bool_t rc = ScaleAndFit(*h1, h0, paint);
602
603 delete h0;
604 delete h1;
605
606 return rc;
607}
608/*
609Bool_t MAlphaFitter::FitTime(const TH3D &hon, const TH3D &hof, UInt_t bin, Bool_t paint)
610{
611 const TString name1(Form("TempAlphaTime%06d_on", gRandom->Integer(1000000)));
612 const TString name0(Form("TempAlphaTime%06d_off", gRandom->Integer(1000000)));
613
614 hon.GetZaxis()->SetRange(bin,bin);
615 TH1D *h1 = (TH1D*)hon.Project3D("ye");
616 hon.GetZaxis()->SetRange(-1,9999);
617 h1->SetDirectory(0);
618
619 hof.GetZaxis()->SetRange(bin,bin);
620 TH1D *h0 = (TH1D*)hof.Project3D("ye");
621 hof.GetZaxis()->SetRange(-1,9999);
622 h0->SetDirectory(0);
623
624 const Bool_t rc = ScaleAndFit(*h1, h0, paint);
625
626 delete h0;
627 delete h1;
628
629 return rc;
630}
631*/
632Bool_t MAlphaFitter::FitAlpha(const TH3D &hon, const TH3D &hof, Bool_t paint)
633{
634 const TString name1(Form("TempAlpha%06d_on", gRandom->Integer(1000000)));
635 const TString name0(Form("TempAlpha%06d_off", gRandom->Integer(1000000)));
636
637 TH1D *h1 = hon.ProjectionZ(name1, -1, 9999, -1, 9999, "E");
638 TH1D *h0 = hof.ProjectionZ(name0, -1, 9999, -1, 9999, "E");
639 h1->SetDirectory(0);
640 h0->SetDirectory(0);
641
642 const Bool_t rc = ScaleAndFit(*h1, h0, paint);
643
644 delete h0;
645 delete h1;
646
647 return rc;
648}
649
650Double_t MAlphaFitter::Scale(TH1D &of, const TH1D &on) const
651{
652 Float_t scaleon = 1;
653 Float_t scaleof = 1;
654 switch (fScaleMode)
655 {
656 case kNone:
657 return 1;
658
659 case kEntries:
660 scaleon = on.GetEntries();
661 scaleof = of.GetEntries();
662 break;
663
664 case kIntegral:
665 scaleon = on.Integral();
666 scaleof = of.Integral();
667 break;
668
669 case kOffRegion:
670 {
671 const Int_t min = on.GetXaxis()->FindFixBin(fScaleMin);
672 const Int_t max = on.GetXaxis()->FindFixBin(fScaleMax);
673 scaleon = on.Integral(min, max);
674 scaleof = of.Integral(min, max);
675 }
676 break;
677
678 case kBackground:
679 {
680 const Int_t min = on.GetXaxis()->FindFixBin(fBgMin);
681 const Int_t max = on.GetXaxis()->FindFixBin(fBgMax);
682 scaleon = on.Integral(min, max);
683 scaleof = of.Integral(min, max);
684 }
685 break;
686
687 case kUserScale:
688 scaleon = fScaleUser;
689 break;
690
691 // This is just to make some compiler happy
692 default:
693 return 1;
694 }
695
696 if (scaleof!=0)
697 {
698 of.Scale(scaleon/scaleof);
699 return scaleon/scaleof;
700 }
701 else
702 {
703 of.Reset();
704 return 0;
705 }
706}
707
708Double_t MAlphaFitter::GetMinimizationValue() const
709{
710 switch (fStrategy)
711 {
712 case kSignificance:
713 return -GetSignificance();
714 case kSignificanceChi2:
715 return -GetSignificance()/GetChiSqSignal();
716 case kSignificanceLogExcess:
717 if (GetEventsExcess()<1)
718 return 0;
719 return -GetSignificance()*TMath::Log10(GetEventsExcess());
720 case kSignificanceExcess:
721 return -GetSignificance()*GetEventsExcess();
722 case kExcess:
723 return -GetEventsExcess();
724 case kGaussSigma:
725 return GetGausSigma();
726 case kWeakSource:
727 return GetEventsBackground()<1 ? -GetEventsExcess() : -GetEventsExcess()/TMath::Sqrt(GetEventsBackground());
728 }
729 return 0;
730}
731
732Int_t MAlphaFitter::ReadEnv(const TEnv &env, TString prefix, Bool_t print)
733{
734 Bool_t rc = kFALSE;
735
736 //void SetScaleUser(Float_t scale) { fScaleUser = scale; fScaleMode=kUserScale; }
737 //void SetScaleMode(ScaleMode_t mode) { fScaleMode = mode; }
738
739 if (IsEnvDefined(env, prefix, "SignalIntegralMax", print))
740 {
741 SetSignalIntegralMax(GetEnvValue(env, prefix, "SignalIntegralMax", fSigInt));
742 rc = kTRUE;
743 }
744 if (IsEnvDefined(env, prefix, "SignalFitMax", print))
745 {
746 SetSignalIntegralMax(GetEnvValue(env, prefix, "SignalFitMax", fSigMax));
747 rc = kTRUE;
748 }
749 if (IsEnvDefined(env, prefix, "BackgroundFitMax", print))
750 {
751 SetBackgroundFitMax(GetEnvValue(env, prefix, "BackgroundFitMax", fBgMax));
752 rc = kTRUE;
753 }
754 if (IsEnvDefined(env, prefix, "BackgroundFitMin", print))
755 {
756 SetBackgroundFitMin(GetEnvValue(env, prefix, "BackgroundFitMin", fBgMin));
757 rc = kTRUE;
758 }
759 if (IsEnvDefined(env, prefix, "ScaleMin", print))
760 {
761 SetScaleMin(GetEnvValue(env, prefix, "ScaleMin", fScaleMin));
762 rc = kTRUE;
763 }
764 if (IsEnvDefined(env, prefix, "ScaleMax", print))
765 {
766 SetScaleMax(GetEnvValue(env, prefix, "ScaleMax", fScaleMax));
767 rc = kTRUE;
768 }
769 if (IsEnvDefined(env, prefix, "PolynomOrder", print))
770 {
771 SetPolynomOrder(GetEnvValue(env, prefix, "PolynomOrder", fPolynomOrder));
772 rc = kTRUE;
773 }
774
775 if (IsEnvDefined(env, prefix, "MinimizationStrategy", print))
776 {
777 TString txt = GetEnvValue(env, prefix, "MinimizationStrategy", "");
778 txt = txt.Strip(TString::kBoth);
779 txt.ToLower();
780 if (txt==(TString)"significance")
781 fStrategy = kSignificance;
782 if (txt==(TString)"significancechi2")
783 fStrategy = kSignificanceChi2;
784 if (txt==(TString)"significanceexcess")
785 fStrategy = kSignificanceExcess;
786 if (txt==(TString)"excess")
787 fStrategy = kExcess;
788 if (txt==(TString)"gausssigma" || txt==(TString)"gaussigma")
789 fStrategy = kGaussSigma;
790 if (txt==(TString)"weaksource")
791 fStrategy = kWeakSource;
792 rc = kTRUE;
793 }
794 if (IsEnvDefined(env, prefix, "Scale", print))
795 {
796 fScaleUser = GetEnvValue(env, prefix, "Scale", fScaleUser);
797 rc = kTRUE;
798 }
799 if (IsEnvDefined(env, prefix, "ScaleMode", print))
800 {
801 TString txt = GetEnvValue(env, prefix, "ScaleMode", "");
802 txt = txt.Strip(TString::kBoth);
803 txt.ToLower();
804 if (txt==(TString)"none")
805 fScaleMode = kNone;
806 if (txt==(TString)"entries")
807 fScaleMode = kEntries;
808 if (txt==(TString)"integral")
809 fScaleMode = kIntegral;
810 if (txt==(TString)"offregion")
811 fScaleMode = kOffRegion;
812 if (txt==(TString)"background")
813 fScaleMode = kBackground;
814 if (txt==(TString)"leastsquare")
815 fScaleMode = kLeastSquare;
816 if (txt==(TString)"userscale")
817 fScaleMode = kUserScale;
818 if (txt==(TString)"fixed")
819 {
820 fScaleMode = kUserScale;
821 fScaleUser = fScaleFactor;
822 }
823 rc = kTRUE;
824 }
825 if (IsEnvDefined(env, prefix, "SignalFunction", print))
826 {
827 TString txt = GetEnvValue(env, prefix, "SignalFunction", "");
828 txt = txt.Strip(TString::kBoth);
829 txt.ToLower();
830 if (txt==(TString)"gauss" || txt==(TString)"gaus")
831 SetSignalFunction(kGauss);
832 if (txt==(TString)"thetasq")
833 SetSignalFunction(kThetaSq);
834 rc = kTRUE;
835 }
836
837 return rc;
838}
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