The present commit corresponds to an important change in the way the
[u/mrichter/AliRoot.git] / TRD / AliTRDCalibraVdriftLinearFit.cxx
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3a0f6479 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
0bc7827a 18////////////////////////////////////////////////////////////////////////////
19// //
20// AliTRDCalibraVdriftLinearFit //
21// //
22// Does the Vdrift an ExB calibration by applying a linear fit //
23// //
24// Author: //
25// R. Bailhache (R.Bailhache@gsi.de) //
26// //
27////////////////////////////////////////////////////////////////////////////
28
3a0f6479 29//Root includes
30#include <TObjArray.h>
31#include <TH2F.h>
32#include <TString.h>
33#include <TVectorD.h>
34#include <TAxis.h>
35#include <TLinearFitter.h>
36#include <TMath.h>
37#include <TTreeStream.h>
38
39//header file
40#include "AliTRDCalibraVdriftLinearFit.h"
41
42ClassImp(AliTRDCalibraVdriftLinearFit) /*FOLD00*/
43
44//_____________________________________________________________________
45AliTRDCalibraVdriftLinearFit::AliTRDCalibraVdriftLinearFit() : /*FOLD00*/
46 TObject(),
47 fVersion(0),
48 fLinearFitterHistoArray(540),
49 fLinearFitterPArray(540),
50 fLinearFitterEArray(540)
51{
52 //
53 // default constructor
54 //
55}
3a0f6479 56//_____________________________________________________________________
57AliTRDCalibraVdriftLinearFit::AliTRDCalibraVdriftLinearFit(const AliTRDCalibraVdriftLinearFit &ped) : /*FOLD00*/
58 TObject(ped),
59 fVersion(ped.fVersion),
60 fLinearFitterHistoArray(540),
61 fLinearFitterPArray(540),
62 fLinearFitterEArray(540)
63{
64 //
65 // copy constructor
66 //
67 for (Int_t idet = 0; idet < 540; idet++){
68 const TVectorD *vectorE = (TVectorD*)ped.fLinearFitterEArray.UncheckedAt(idet);
69 const TVectorD *vectorP = (TVectorD*)ped.fLinearFitterPArray.UncheckedAt(idet);
70 const TH2F *hped = (TH2F*)ped.fLinearFitterHistoArray.UncheckedAt(idet);
71
72 if ( vectorE != 0x0 ) fLinearFitterEArray.AddAt(new TVectorD(*vectorE), idet);
73 if ( vectorP != 0x0 ) fLinearFitterPArray.AddAt(new TVectorD(*vectorP), idet);
74 if ( hped != 0x0 ){
75 TH2F *hNew = new TH2F(*hped);
76 hNew->SetDirectory(0);
77 fLinearFitterHistoArray.AddAt(hNew,idet);
78 }
79
80 }
81}
82//_____________________________________________________________________
d0569428 83AliTRDCalibraVdriftLinearFit::AliTRDCalibraVdriftLinearFit(const TObjArray &obja) : /*FOLD00*/
84 TObject(),
85 fVersion(0),
86 fLinearFitterHistoArray(540),
87 fLinearFitterPArray(540),
88 fLinearFitterEArray(540)
89{
90 //
91 // constructor from a TObjArray
92 //
93 for (Int_t idet = 0; idet < 540; idet++){
94 const TH2F *hped = (TH2F*)obja.UncheckedAt(idet);
95 if ( hped != 0x0 ){
96 TH2F *hNew = new TH2F(*hped);
97 hNew->SetDirectory(0);
98 fLinearFitterHistoArray.AddAt(hNew,idet);
99 }
100 }
101}
102//_____________________________________________________________________
3a0f6479 103AliTRDCalibraVdriftLinearFit& AliTRDCalibraVdriftLinearFit::operator = (const AliTRDCalibraVdriftLinearFit &source)
104{
105 //
106 // assignment operator
107 //
108 if (&source == this) return *this;
109 new (this) AliTRDCalibraVdriftLinearFit(source);
110
111 return *this;
112}
113//_____________________________________________________________________
114AliTRDCalibraVdriftLinearFit::~AliTRDCalibraVdriftLinearFit() /*FOLD00*/
115{
116 //
117 // destructor
118 //
1ca79a00 119 fLinearFitterHistoArray.Delete();
120 fLinearFitterPArray.Delete();
121 fLinearFitterEArray.Delete();
122
3a0f6479 123}
64942b85 124//_____________________________________________________________________________
125void AliTRDCalibraVdriftLinearFit::Copy(TObject &c) const
126{
127 //
128 // Copy function
129 //
130
131 AliTRDCalibraVdriftLinearFit& target = (AliTRDCalibraVdriftLinearFit &) c;
132
133 // Copy only the histos
134 for (Int_t idet = 0; idet < 540; idet++){
135 if(fLinearFitterHistoArray.UncheckedAt(idet)){
136 TH2F *hped1 = target.GetLinearFitterHisto(idet,kTRUE);
137 hped1->SetDirectory(0);
138 hped1->Add((const TH1F *)fLinearFitterHistoArray.UncheckedAt(idet));
139 }
140
141 }
142
143 TObject::Copy(c);
144
145}
146//_____________________________________________________________________________
147Long64_t AliTRDCalibraVdriftLinearFit::Merge(TCollection* list)
148{
149 // Merge list of objects (needed by PROOF)
150
151 if (!list)
152 return 0;
153
154 if (list->IsEmpty())
155 return 1;
156
157 TIterator* iter = list->MakeIterator();
158 TObject* obj = 0;
159
160 // collection of generated histograms
161 Int_t count=0;
162 while((obj = iter->Next()) != 0)
163 {
164 AliTRDCalibraVdriftLinearFit* entry = dynamic_cast<AliTRDCalibraVdriftLinearFit*>(obj);
165 if (entry == 0) continue;
166
167 // Copy only the histos
168 for (Int_t idet = 0; idet < 540; idet++){
169 if(entry->GetLinearFitterHisto(idet)){
170 TH2F *hped1 = GetLinearFitterHisto(idet,kTRUE);
171 hped1->SetDirectory(0);
172 hped1->Add(entry->GetLinearFitterHisto(idet));
173 }
174
175 }
176
177 count++;
178 }
179
180 return count;
181}
3a0f6479 182//_____________________________________________________________________
183void AliTRDCalibraVdriftLinearFit::Add(AliTRDCalibraVdriftLinearFit *ped)
184{
185 //
186 // Add histo
187 //
188
189 fVersion++;
190
191 for (Int_t idet = 0; idet < 540; idet++){
192 const TH2F *hped = (TH2F*)ped->GetLinearFitterHisto(idet);
193 //printf("idet %d\n",idet);
194 if ( hped != 0x0 ){
195 //printf("add\n");
196 TH2F *hped1 = GetLinearFitterHisto(idet,kTRUE);
197 //printf("test2\n");
198 hped1->SetDirectory(0);
199 //printf("test4\n");
200 hped1->Add(hped);
201 //printf("test3\n");
202 }
203 }
204}
205//______________________________________________________________________________________
206TH2F* AliTRDCalibraVdriftLinearFit::GetLinearFitterHisto(Int_t detector, Bool_t force)
207{
208 //
209 // return pointer to TH2F histo
210 // if force is true create a new histo if it doesn't exist allready
211 //
212 if ( !force || fLinearFitterHistoArray.UncheckedAt(detector) )
213 return (TH2F*)fLinearFitterHistoArray.UncheckedAt(detector);
214
215 // if we are forced and TLinearFitter doesn't yes exist create it
216
217 // new TH2F
218 TString name("LFDV");
219 name += detector;
220 name += "version";
221 name += fVersion;
222
223 TH2F *lfdv = new TH2F((const Char_t *)name,(const Char_t *) name
224 ,100,-1.0,1.0,100
225 ,-2.0,2.0);
226 lfdv->SetXTitle("tan(phi_{track})");
227 lfdv->SetYTitle("dy/dt");
228 lfdv->SetZTitle("Number of clusters");
229 lfdv->SetStats(0);
230 lfdv->SetDirectory(0);
231
232 fLinearFitterHistoArray.AddAt(lfdv,detector);
233 return lfdv;
234}
235//______________________________________________________________________________________
236Bool_t AliTRDCalibraVdriftLinearFit::GetParam(Int_t detector, TVectorD *param)
237{
238 //
239 // return param for this detector
240 //
241 if ( fLinearFitterPArray.UncheckedAt(detector) ){
242 const TVectorD *vectorP = (TVectorD*)fLinearFitterPArray.UncheckedAt(detector);
243 if(!param) param = new TVectorD(2);
244 for(Int_t k = 0; k < 2; k++){
245 (*param)[k] = (*vectorP)[k];
246 }
247 return kTRUE;
248 }
249 else return kFALSE;
250
251}
252//______________________________________________________________________________________
253Bool_t AliTRDCalibraVdriftLinearFit::GetError(Int_t detector, TVectorD *error)
254{
255 //
256 // return error for this detector
257 //
258 if ( fLinearFitterEArray.UncheckedAt(detector) ){
259 const TVectorD *vectorE = (TVectorD*)fLinearFitterEArray.UncheckedAt(detector);
260 if(!error) error = new TVectorD(3);
261 for(Int_t k = 0; k < 3; k++){
262 (*error)[k] = (*vectorE)[k];
263 }
264 return kTRUE;
265 }
266 else return kFALSE;
267
268}
269//______________________________________________________________________________________
270void AliTRDCalibraVdriftLinearFit::Update(Int_t detector, Float_t tnp, Float_t pars1)
271{
272 //
273 // Fill the 2D histos for debugging
274 //
275
276 ((TH2F *) GetLinearFitterHisto(detector,kTRUE))->Fill(tnp,pars1);
277
278}
279//____________Functions fit Online CH2d________________________________________
280void AliTRDCalibraVdriftLinearFit::FillPEArray()
281{
282 //
283 // Fill fLinearFitterPArray and fLinearFitterEArray from inside
284 //
285
286
287 Int_t *arrayI = new Int_t[540];
288 for(Int_t k = 0; k< 540; k++){
289 arrayI[k] = 0;
290 }
291
292 // Loop over histos
293 for(Int_t cb = 0; cb < 540; cb++){
294 const TH2F *linearfitterhisto = (TH2F*)fLinearFitterHistoArray.UncheckedAt(cb);
295 //printf("Processing the detector cb %d we find %d\n",cb, (Bool_t) linearfitterhisto);
296
297 if ( linearfitterhisto != 0 ){
298
299 // Fill a linearfitter
300 TAxis *xaxis = linearfitterhisto->GetXaxis();
301 TAxis *yaxis = linearfitterhisto->GetYaxis();
302 TLinearFitter linearfitter = TLinearFitter(2,"pol1");
303 //printf("test\n");
304 for(Int_t ibinx = 0; ibinx < linearfitterhisto->GetNbinsX(); ibinx++){
305 for(Int_t ibiny = 0; ibiny < linearfitterhisto->GetNbinsY(); ibiny++){
306 if(linearfitterhisto->GetBinContent(ibinx+1,ibiny+1)>0){
307 Double_t x = xaxis->GetBinCenter(ibinx+1);
308 Double_t y = yaxis->GetBinCenter(ibiny+1);
309 for(Int_t k = 0; k < (Int_t)linearfitterhisto->GetBinContent(ibinx+1,ibiny+1); k++){
310 linearfitter.AddPoint(&x,y);
311 arrayI[cb]++;
312 }
313 }
314 }
315 }
316
317 //printf("Find %d entries for the detector %d\n",arrayI[cb],cb);
318
319 // Eval the linear fitter
320 if(arrayI[cb]>10){
321 TVectorD *par = new TVectorD(2);
322 TVectorD pare = TVectorD(2);
323 TVectorD *parE = new TVectorD(3);
324 linearfitter.Eval();
325 linearfitter.GetParameters(*par);
326 linearfitter.GetErrors(pare);
327 Float_t ppointError = TMath::Sqrt(TMath::Abs(linearfitter.GetChisquare())/arrayI[cb]);
328 (*parE)[0] = pare[0]*ppointError;
329 (*parE)[1] = pare[1]*ppointError;
330 (*parE)[2] = (Double_t) arrayI[cb];
331 fLinearFitterPArray.AddAt(par,cb);
332 fLinearFitterEArray.AddAt(parE,cb);
333 //par->Print();
334 //parE->Print();
335 }
336 }// if something
337 }
338
339}