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72e010d3 | 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 | ||
17 | //Root includes | |
18 | #include <TH1F.h> | |
19 | #include <TH1D.h> | |
20 | #include <TH2F.h> | |
21 | #include <TH3F.h> | |
22 | #include <TString.h> | |
23 | #include <TMath.h> | |
24 | #include <TF1.h> | |
25 | #include <TRandom.h> | |
26 | #include <TDirectory.h> | |
27 | #include <TFile.h> | |
28 | #include <TAxis.h> | |
29 | //AliRoot includes | |
30 | #include "AliRawReader.h" | |
31 | #include "AliRawReaderRoot.h" | |
32 | #include "AliRawReaderDate.h" | |
33 | #include "AliTPCRawStream.h" | |
34 | #include "AliTPCCalROC.h" | |
35 | #include "AliTPCCalPad.h" | |
36 | #include "AliTPCROC.h" | |
37 | #include "AliMathBase.h" | |
38 | #include "TTreeStream.h" | |
39 | #include "AliTPCRawStreamFast.h" | |
40 | ||
41 | //date | |
42 | #include "event.h" | |
43 | ||
44 | //header file | |
45 | #include "AliTPCCalibKr.h" | |
46 | ||
47 | //---------------------------------------------------------------------------- | |
48 | // The AliTPCCalibKr class description (TPC Kr calibration). | |
49 | // | |
50 | // | |
51 | // The AliTPCCalibKr fills the array of TH3F histograms (TPC_max_padraw,TPC_max_pad,TPC_ADC_cluster), | |
52 | // its data memebers. | |
53 | // | |
54 | // As the input it requires the tree with reconstructed Kr clusters (AliTPCclusterKr objects). | |
55 | // The AliTPCCalibKr objects containing an array of TH3F histograms are stored (by default) in the | |
56 | // ouptut (outHistFile.root) file. | |
57 | // | |
58 | // The ouput TH3F histograms are later used to determine the calibration parameters of TPC chambers. | |
59 | // These calculations are done by using AliTPCCalibKr::Analyse() function. The ouput calibration | |
60 | // parameters (details in AliTPCCalibKr::Analyse()) are stored in the calibKr.root file for each TPC pad. | |
61 | // In addition the debugCalibKr.root file with debug information is created. | |
62 | // | |
63 | // Usage example: | |
64 | // | |
65 | // 1. Create outHistFile.root histogram file: | |
66 | // | |
67 | // -- Load libXrdClient.so if data on Xrd cluster e.g. (GSI) | |
68 | // gSystem->Load("/usr/local/grid/XRootd/GSI/lib64/libXrdClient.so"); | |
69 | // | |
70 | // -- Load toolkit | |
71 | // gSystem->AddIncludePath("-I$ALICE_ROOT/TPC/macros"); | |
72 | // gROOT->LoadMacro("$ALICE_ROOT/TPC/macros/AliXRDPROOFtoolkit.cxx+"); | |
73 | // AliXRDPROOFtoolkit tool; | |
74 | // | |
75 | // -- Make chain of files | |
76 | // TChain * chain = tool.MakeChain("KrClusters.txt","Kr","",1000,0); | |
77 | // | |
78 | // -- Run AliTPCCalibKr task (Only TPC C side) | |
79 | // AliTPCCalibKr *task = new AliTPCCalibKr; | |
80 | // task->SetInputChain(chain); | |
81 | // task->SetASide(kFALSE); | |
82 | // | |
83 | // task->Process(); | |
84 | // | |
85 | // 2. Analyse output histograms: | |
86 | // | |
87 | // TFile f("outHistFile.root"); | |
88 | // AliTPCCalibKr.Analyse(); | |
89 | // | |
90 | // 3. See calibration parameters e.g.: | |
91 | // | |
92 | // TFile f("calibKr.root"); | |
93 | // spectrMean->GetCalROC(70)->GetValue(40,40); | |
94 | // fitMean->GetCalROC(70)->GetValue(40,40); | |
95 | // | |
96 | // 4. See debug information e.g.: | |
97 | // | |
98 | // TFile f("debugCalibKr.root"); | |
99 | // .ls; | |
100 | // | |
101 | // -- Print calibKr TTree content | |
102 | // calibKr->Print(); | |
103 | // | |
104 | // -- Draw calibKr TTree variables | |
105 | // calibKr.Draw("fitMean"); | |
106 | // | |
107 | // | |
108 | // Author: Jacek Otwinowski (J.Otwinowski@gsi.de) and Stafan Geartner (S.Gaertner@gsi.de) | |
109 | //----------------------------------------------------------------------------- | |
110 | ||
111 | ClassImp(AliTPCCalibKr) | |
112 | ||
113 | AliTPCCalibKr::AliTPCCalibKr() : | |
114 | TObject(), | |
115 | ||
116 | bOutputHisto(kTRUE), | |
117 | bASide(kTRUE), | |
118 | bCSide(kTRUE), | |
119 | fClusters(0), | |
120 | fClustKr(0), | |
121 | fTree(0), | |
122 | fHistoKrArray(72) | |
123 | { | |
124 | // | |
125 | // default constructor | |
126 | // | |
127 | } | |
128 | ||
129 | //_____________________________________________________________________ | |
130 | AliTPCCalibKr::AliTPCCalibKr(const AliTPCCalibKr& pad) : | |
131 | TObject(pad), | |
132 | ||
133 | bOutputHisto(pad.bOutputHisto), | |
134 | bASide(pad.bASide), | |
135 | bCSide(pad.bCSide), | |
136 | fClusters(pad.fClusters), | |
137 | fClustKr(pad.fClustKr), | |
138 | fTree(pad.fTree), | |
139 | fHistoKrArray(72) | |
140 | { | |
141 | // copy constructor | |
142 | ||
143 | for (Int_t iSec = 0; iSec < 72; ++iSec) | |
144 | { | |
145 | TH3F *hOld = pad.GetHistoKr(iSec); | |
146 | if(hOld) { | |
147 | TH3F *hNew = new TH3F( *pad.GetHistoKr(iSec) ); | |
148 | fHistoKrArray.AddAt(hNew,iSec); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | //_____________________________________________________________________ | |
154 | AliTPCCalibKr::~AliTPCCalibKr() | |
155 | { | |
156 | // | |
157 | // destructor | |
158 | // | |
159 | if(fClustKr) delete fClustKr; fClustKr = 0; | |
160 | if(fClusters) delete fClusters; fClusters = 0; | |
161 | if(fTree) delete fTree; fTree = 0; | |
162 | fHistoKrArray.Delete(); | |
163 | } | |
164 | ||
165 | //_____________________________________________________________________ | |
166 | AliTPCCalibKr& AliTPCCalibKr::operator = (const AliTPCCalibKr &source) | |
167 | { | |
168 | // assignment operator | |
169 | ||
170 | if (&source == this) return *this; | |
171 | new (this) AliTPCCalibKr(source); | |
172 | ||
173 | return *this; | |
174 | } | |
175 | ||
176 | //_____________________________________________________________________ | |
177 | void AliTPCCalibKr::Init() | |
178 | { | |
179 | // | |
180 | // init input tree and output histograms | |
181 | // | |
182 | ||
183 | // set input tree | |
184 | if(!fTree) { | |
185 | Printf("ERROR: Could not read chain from input"); | |
186 | } | |
187 | else { | |
188 | fTree->SetBranchStatus("*",1); | |
189 | } | |
190 | ||
191 | // set branch address | |
192 | fClusters = new TClonesArray("AliTPCclusterKr"); | |
193 | ||
194 | if(!fTree->GetBranch("fClusters")) { | |
195 | Printf("ERROR: Could not get fClusters branch from input"); | |
196 | } else { | |
197 | fTree->GetBranch("fClusters")->SetAddress(&fClusters); | |
198 | } | |
199 | ||
200 | // create output TObjArray | |
201 | fHistoKrArray.Clear(); | |
202 | ||
203 | // add histograms to the TObjArray | |
204 | for(Int_t i=0; i<72; ++i) { | |
205 | ||
206 | // C - side | |
207 | if( IsCSide(i) == kTRUE && bCSide == kTRUE) { | |
208 | TH3F *hist = CreateHisto(i); | |
209 | if(hist) fHistoKrArray.AddAt(hist,i); | |
210 | } | |
211 | ||
212 | // A - side | |
213 | if(IsCSide(i) == kFALSE && bASide == kTRUE) { | |
214 | TH3F *hist = CreateHisto(i); | |
215 | if(hist) fHistoKrArray.AddAt(hist,i); | |
216 | } | |
217 | ||
218 | } | |
219 | } | |
220 | ||
221 | //_____________________________________________________________________ | |
222 | Bool_t AliTPCCalibKr::ReadEntry(Int_t evt) | |
223 | { | |
224 | // | |
225 | // read entry from the tree | |
226 | // | |
227 | Long64_t centry = fTree->LoadTree(evt); | |
228 | if(centry < 0) return kFALSE; | |
229 | ||
230 | if(!fTree->GetBranch("fClusters")) | |
231 | { | |
232 | Printf("ERROR: Could not get fClusters branch from input"); | |
233 | return kFALSE; | |
234 | } else { | |
235 | fTree->GetBranch("fClusters")->SetAddress(&fClusters); | |
236 | } | |
237 | ||
238 | fTree->GetEntry(evt); | |
239 | ||
240 | return kTRUE; | |
241 | } | |
242 | ||
243 | //_____________________________________________________________________ | |
244 | Bool_t AliTPCCalibKr::Process() | |
245 | { | |
246 | // | |
247 | // process events | |
248 | // call event by event | |
249 | // | |
250 | ||
251 | // init tree | |
252 | Init(); | |
253 | ||
254 | // get events | |
255 | if(!fTree) return kFALSE; | |
256 | Int_t nEvents = fTree->GetEntries(); | |
257 | ||
258 | // fill histograms | |
259 | for(Int_t i=0; i<nEvents; ++i) | |
260 | { | |
261 | if(ReadEntry(i) == kFALSE) return kFALSE; | |
262 | ||
263 | if(!(i%10000)) cout << "evt: " << i << endl; | |
264 | ||
265 | // get TClonesArray entries | |
266 | fClustKr = 0; | |
267 | Int_t entries = fClusters->GetEntries(); | |
268 | for(Int_t j=0; j < entries; ++j) | |
269 | { | |
270 | fClustKr = (AliTPCclusterKr*)fClusters->At(j); | |
271 | ||
272 | if(fClustKr) Update(fClustKr); | |
273 | else return kFALSE; | |
274 | } | |
275 | } | |
276 | ||
277 | // write output | |
278 | return Terminate(); | |
279 | } | |
280 | ||
281 | //_____________________________________________________________________ | |
282 | TH3F* AliTPCCalibKr::CreateHisto(Int_t chamber) | |
283 | { | |
284 | // | |
285 | // create new histogram | |
286 | // | |
287 | char name[256]; | |
288 | TH3F *h; | |
289 | ||
290 | sprintf(name,"ADCcluster_ch%d",chamber); | |
291 | ||
292 | if( IsIROC(chamber) == kTRUE ) | |
293 | { | |
294 | h = new TH3F(name,name,63,0,63,100,0,100,150,100,3000); | |
295 | } else { | |
296 | h = new TH3F(name,name,96,0,96,100,0,100,150,100,3000); | |
297 | } | |
298 | h->SetXTitle("padrow"); | |
299 | h->SetYTitle("pad"); | |
300 | h->SetZTitle("fADC"); | |
301 | ||
302 | return h; | |
303 | } | |
304 | ||
305 | //_____________________________________________________________________ | |
306 | Bool_t AliTPCCalibKr::IsIROC(Int_t chamber) | |
307 | { | |
308 | // check if IROCs | |
309 | // returns kTRUE if IROCs and kFALSE if OROCs | |
310 | ||
311 | if(chamber>=0 && chamber<36) return kTRUE; | |
312 | ||
313 | return kFALSE; | |
314 | } | |
315 | ||
316 | //_____________________________________________________________________ | |
317 | Bool_t AliTPCCalibKr::IsCSide(Int_t chamber) | |
318 | { | |
319 | // check if C side | |
320 | // returns kTRUE if C side and kFALSE if A side | |
321 | ||
322 | if((chamber>=18 && chamber<36) || (chamber>=54 && chamber<72)) return kTRUE; | |
323 | ||
324 | return kFALSE; | |
325 | } | |
326 | ||
327 | //_____________________________________________________________________ | |
328 | Bool_t AliTPCCalibKr::Update(AliTPCclusterKr *cl) | |
329 | { | |
330 | // | |
331 | // fill existing histograms | |
332 | // | |
333 | TH3F *h = (TH3F*)fHistoKrArray.At(cl->GetSec()); | |
334 | if(!h) return kFALSE; | |
335 | ||
336 | if(cl->GetSize()>20) | |
337 | h->Fill(cl->GetMax().GetRow(),cl->GetMax().GetPad(),cl->GetADCcluster()); | |
338 | ||
339 | return kTRUE; | |
340 | } | |
341 | ||
342 | //_____________________________________________________________________ | |
343 | TH3F* AliTPCCalibKr::GetHistoKr(Int_t chamber) const | |
344 | { | |
345 | // get histograms from fHistoKrArray | |
346 | return (TH3F*) fHistoKrArray.At(chamber); | |
347 | } | |
348 | ||
349 | //_____________________________________________________________________ | |
350 | Bool_t AliTPCCalibKr::Terminate() | |
351 | { | |
352 | // | |
353 | // store AliTPCCalibKr in the output file | |
354 | // | |
355 | if(bOutputHisto) { | |
356 | TFile *outFile = new TFile("outHistFile.root","RECREATE"); | |
357 | ||
358 | if(outFile) | |
359 | { | |
360 | outFile->cd(); | |
361 | ||
362 | for(int i=0; i<72; ++i) { | |
363 | if( IsCSide(i) == kTRUE && bCSide == kTRUE) | |
364 | printf("C side chamber: %d, 3D histo entries: %10.f \n",i,((TH3F*)fHistoKrArray.At(i))->GetEntries()); | |
365 | ||
366 | if( IsCSide(i) == kFALSE && bASide == kTRUE) | |
367 | printf("A side chamber: %d, 3D histo entries: %10.f \n",i,((TH3F*)fHistoKrArray.At(i))->GetEntries()); | |
368 | } | |
369 | this->Write(); | |
370 | outFile->Close(); | |
371 | ||
372 | return kTRUE; | |
373 | } | |
374 | else | |
375 | return kFALSE; | |
376 | } | |
377 | ||
378 | return kFALSE; | |
379 | } | |
380 | ||
381 | //_____________________________________________________________________ | |
382 | void AliTPCCalibKr::Analyse() | |
383 | { | |
384 | // | |
385 | // analyse the histograms and extract krypton calibration parameters | |
386 | // | |
387 | ||
388 | // AliTPCCalPads that will contain the calibration parameters | |
389 | AliTPCCalPad* spectrMeanCalPad = new AliTPCCalPad("spectrMean", "spectrMean"); | |
390 | AliTPCCalPad* spectrRMSCalPad = new AliTPCCalPad("spectrRMS", "spectrRMS"); | |
391 | AliTPCCalPad* fitMeanCalPad = new AliTPCCalPad("fitMean", "fitMean"); | |
392 | AliTPCCalPad* fitRMSCalPad = new AliTPCCalPad("fitRMS", "fitRMS"); | |
393 | AliTPCCalPad* fitNormChi2CalPad = new AliTPCCalPad("fitNormChi2", "fitNormChi2"); | |
394 | AliTPCCalPad* entriesCalPad = new AliTPCCalPad("entries", "entries"); | |
395 | ||
396 | // file stream for debugging purposes | |
397 | TTreeSRedirector* debugStream = new TTreeSRedirector("debugCalibKr.root"); | |
398 | ||
399 | // if entries in spectrum less than minEntries, then the fit won't be performed | |
400 | Int_t minEntries = 1; //300; | |
401 | ||
402 | Double_t windowFrac = 0.12; | |
403 | // the 3d histogram will be projected on the pads given by the following window size | |
404 | // set the numbers to 0 if you want to do a pad-by-pad calibration | |
405 | UInt_t rowRadius = 5; | |
406 | UInt_t padRadius = 10; | |
407 | // the step size by which pad and row are incremented is given by the following numbers | |
408 | // set them to 1 if you want the finest granularity | |
409 | UInt_t rowStep = 1; // formerly: 2*rowRadius | |
410 | UInt_t padStep = 1; // formerly: 2*padRadius | |
411 | ||
412 | for (Int_t chamber = 0; chamber < 72; chamber++) { | |
413 | //if (chamber != 71) continue; | |
414 | AliTPCCalROC roc(chamber); // I need this only for GetNrows() and GetNPads() | |
415 | ||
416 | // Usually I would traverse each pad, take the spectrum for its neighbourhood and | |
417 | // obtain the calibration parameters. This takes very long, so instead I assign the same | |
418 | // calibration values to the whole neighbourhood and then go on to the next neighbourhood. | |
419 | UInt_t nRows = roc.GetNrows(); | |
420 | for (UInt_t iRow = 0; iRow < nRows; iRow += rowStep) { | |
421 | UInt_t nPads = roc.GetNPads(iRow); | |
422 | //if (iRow >= 10) break; | |
423 | for (UInt_t iPad = 0; iPad < nPads; iPad += padStep) { | |
424 | //if (iPad >= 20) break; | |
425 | TH3F* h = GetHistoKr(chamber); | |
426 | if (!h) continue; | |
427 | ||
428 | // the 3d histogram will be projected on the pads given by the following bounds | |
429 | // for rows and pads | |
430 | Int_t rowLow = iRow - rowRadius; | |
431 | UInt_t rowUp = iRow + rowRadius; | |
432 | Int_t padLow = iPad - padRadius; | |
433 | UInt_t padUp = iPad + padRadius; | |
434 | // if window goes out of chamber | |
435 | if (rowLow < 0) rowLow = 0; | |
436 | if (rowUp >= nRows) rowUp = nRows - 1; | |
437 | if (padLow < 0) padLow = 0; | |
438 | if (padUp >= nPads) padUp = nPads - 1; | |
439 | ||
440 | // project the histogram | |
441 | //TH1D* projH = h->ProjectionZ("projH", rowLow, rowUp, padLow, padUp); // SLOW | |
442 | TH1D* projH = ProjectHisto(h, "projH", rowLow, rowUp, padLow, padUp); | |
443 | ||
444 | // get the number of entries in the spectrum | |
445 | Double_t entries = projH->GetEntries(); | |
446 | if (entries < minEntries) { delete projH; continue; } | |
447 | ||
448 | // get the two calibration parameters mean of spectrum and RMS of spectrum | |
449 | Double_t histMean = projH->GetMean(); | |
450 | Double_t histRMS = (histMean != 0) ? projH->GetRMS() / histMean : 0.; | |
451 | ||
452 | // find maximum in spectrum to define a range (given by windowFrac) for which a Gauss is fitted | |
453 | Double_t maxEntries = projH->GetBinCenter(projH->GetMaximumBin()); | |
454 | Int_t fitResult = projH->Fit("gaus", "Q0", "", (1.-windowFrac) * maxEntries, (1.+windowFrac) * maxEntries); | |
455 | if (fitResult != 0) { | |
456 | Error("Analyse", "Error while fitting spectrum for chamber %i, rows %i - %i, pads %i - %i.", chamber, rowLow, rowUp, padLow, padUp); | |
457 | delete projH; | |
458 | continue; | |
459 | } | |
460 | ||
461 | // get the two calibration parameters mean of gauss fit and sigma of gauss fit | |
462 | TF1* gausFit = projH->GetFunction("gaus"); | |
463 | Double_t fitMean = gausFit->GetParameter(1); | |
464 | Double_t fitRMS = gausFit->GetParameter(2); | |
465 | Int_t numberFitPoints = gausFit->GetNumberFitPoints(); | |
466 | if (numberFitPoints == 0) continue; | |
467 | Double_t fitNormChi2 = gausFit->GetChisquare() / numberFitPoints; | |
468 | delete gausFit; | |
469 | delete projH; | |
470 | if (fitMean <= 0) continue; | |
471 | printf("[ch%i r%i, p%i] entries = %f, maxEntries = %f, fitMean = %f, fitRMS = %f\n", chamber, iRow, iPad, entries, maxEntries, fitMean, fitRMS); | |
472 | ||
473 | // write the calibration parameters for each pad that the 3d histogram was projected onto | |
474 | // (with considering the step size) to the CalPads | |
475 | // rowStep (padStep) odd: round down s/2 and fill this # of rows (pads) in both directions | |
476 | // rowStep (padStep) even: fill s/2 rows (pads) in ascending direction, s/2-1 in descending direction | |
477 | for (Int_t r = iRow - (rowStep/2 - (rowStep+1)%2); r <= (Int_t)(iRow + rowStep/2); r++) { | |
478 | if (r < 0 || r >= (Int_t)nRows) continue; | |
479 | UInt_t nPads = roc.GetNPads(r); | |
480 | for (Int_t p = iPad - (padStep/2 - (padStep+1)%2); p <= (Int_t)(iPad + padStep/2); p++) { | |
481 | if (p < 0 || p >= (Int_t)nPads) continue; | |
482 | spectrMeanCalPad->GetCalROC(chamber)->SetValue(r, p, histMean); | |
483 | spectrRMSCalPad->GetCalROC(chamber)->SetValue(r, p, histRMS); | |
484 | fitMeanCalPad->GetCalROC(chamber)->SetValue(r, p, fitMean); | |
485 | fitRMSCalPad->GetCalROC(chamber)->SetValue(r, p, fitRMS); | |
486 | fitNormChi2CalPad->GetCalROC(chamber)->SetValue(r, p, fitNormChi2); | |
487 | entriesCalPad->GetCalROC(chamber)->SetValue(r, p, entries); | |
488 | ||
489 | (*debugStream) << "calibKr" << | |
490 | "sector=" << chamber << // chamber number | |
491 | "row=" << r << // row number | |
492 | "pad=" << p << // pad number | |
493 | "histMean=" << histMean << // mean of the spectrum | |
494 | "histRMS=" << histRMS << // RMS of the spectrum divided by the mean | |
495 | "fitMean=" << fitMean << // Gauss fitted mean of the 41.6 keV Kr peak | |
496 | "fitRMS=" << fitRMS << // Gauss fitted sigma of the 41.6 keV Kr peak | |
497 | "fitNormChi2" << fitNormChi2 << // normalized chi square of the Gauss fit | |
498 | "entries=" << entries << // number of entries for the spectrum | |
499 | "\n"; | |
500 | } | |
501 | } | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | TFile f("calibKr.root", "recreate"); | |
507 | spectrMeanCalPad->Write(); | |
508 | spectrRMSCalPad->Write(); | |
509 | fitMeanCalPad->Write(); | |
510 | fitRMSCalPad->Write(); | |
511 | fitNormChi2CalPad->Write(); | |
512 | entriesCalPad->Write(); | |
513 | f.Close(); | |
514 | delete spectrMeanCalPad; | |
515 | delete spectrRMSCalPad; | |
516 | delete fitMeanCalPad; | |
517 | delete fitRMSCalPad; | |
518 | delete fitNormChi2CalPad; | |
519 | delete entriesCalPad; | |
520 | delete debugStream; | |
521 | } | |
522 | ||
523 | //_____________________________________________________________________ | |
524 | TH1D* AliTPCCalibKr::ProjectHisto(TH3F* histo3D, const char* name, Int_t xMin, Int_t xMax, Int_t yMin, Int_t yMax) | |
525 | { | |
526 | // project the z-axis of a 3d histo to a specific range of the x- and y-axes, | |
527 | // replaces TH3F::ProjectZ() to gain more speed | |
528 | ||
529 | TAxis* xAxis = histo3D->GetXaxis(); | |
530 | TAxis* yAxis = histo3D->GetYaxis(); | |
531 | TAxis* zAxis = histo3D->GetZaxis(); | |
532 | Double_t zMinVal = zAxis->GetXmin(); | |
533 | Double_t zMaxVal = zAxis->GetXmax(); | |
534 | ||
535 | Int_t nBinsZ = zAxis->GetNbins(); | |
536 | TH1D* projH = new TH1D(name, name, nBinsZ, zMinVal, zMaxVal); | |
537 | ||
538 | Int_t nx = xAxis->GetNbins()+2; | |
539 | Int_t ny = yAxis->GetNbins()+2; | |
540 | Int_t bin = 0; | |
541 | Double_t entries = 0.; | |
542 | for (Int_t x = xMin; x <= xMax; x++) { | |
543 | for (Int_t y = yMin; y <= yMax; y++) { | |
544 | for (Int_t z = 0; z <= nBinsZ+1; z++) { | |
545 | bin = x + nx * (y + ny * z); | |
546 | Double_t val = histo3D->GetBinContent(bin); | |
547 | projH->Fill(zAxis->GetBinCenter(z), val); | |
548 | entries += val; | |
549 | } | |
550 | } | |
551 | } | |
552 | projH->SetEntries((Long64_t)entries); | |
553 | return projH; | |
554 | } |