adding macro that applies the corrections and visualizes the result
[u/mrichter/AliRoot.git] / PWG0 / AliCorrectionMatrix.cxx
CommitLineData
bf21645b 1/* $Id$ */
2
3// ------------------------------------------------------
4//
5// Class to handle corrections.
6//
7// ------------------------------------------------------
8//
9
10#include <TFile.h>
11#include <TCanvas.h>
12#include <TH2F.h>
13
14#include <AliLog.h>
15
16#include "AliCorrectionMatrix.h"
17
18//____________________________________________________________________
19ClassImp(AliCorrectionMatrix)
20
21//____________________________________________________________________
22AliCorrectionMatrix::AliCorrectionMatrix() : TNamed(),
23 fhMeas(0),
24 fhGene(0),
25 fhCorr(0)
26{
27 // default constructor
28}
29
61385583 30//____________________________________________________________________
bf21645b 31AliCorrectionMatrix::AliCorrectionMatrix(const Char_t* name, const Char_t* title) : TNamed(name, title),
32 fhMeas(0),
33 fhGene(0),
34 fhCorr(0)
35{
36 // constructor initializing tnamed
37}
38
39//____________________________________________________________________
61385583 40AliCorrectionMatrix::AliCorrectionMatrix(const AliCorrectionMatrix& c) : TNamed(c),
41 fhMeas(0),
42 fhGene(0),
43 fhCorr(0)
bf21645b 44{
45 // copy constructor
46 ((AliCorrectionMatrix &)c).Copy(*this);
47}
48
49//____________________________________________________________________
50AliCorrectionMatrix::~AliCorrectionMatrix()
51{
52 //
53 // destructor
54 //
55
56 if (fhMeas)
57 {
58 delete fhMeas;
59 fhMeas = 0;
60 }
61
62 if (fhGene)
63 {
64 delete fhGene;
65 fhGene = 0;
66 }
67
68 if (fhCorr)
69 {
70 delete fhCorr;
71 fhCorr = 0;
72 }
73}
74
75//____________________________________________________________________
76AliCorrectionMatrix &AliCorrectionMatrix::operator=(const AliCorrectionMatrix &c)
77{
78 // assigment operator
79
61385583 80 if (this != &c)
bf21645b 81 ((AliCorrectionMatrix &) c).Copy(*this);
82
83 return *this;
84}
85
86//____________________________________________________________________
87void AliCorrectionMatrix::Copy(TObject& c) const
88{
89 // copy function
90
91 AliCorrectionMatrix& target = (AliCorrectionMatrix &) c;
92
93 if (fhMeas)
94 target.fhMeas = dynamic_cast<TH1*> (fhMeas->Clone());
95
96 if (fhGene)
97 target.fhGene = dynamic_cast<TH1*> (fhGene->Clone());
98
99 if (fhCorr)
100 target.fhCorr = dynamic_cast<TH1*> (fhCorr->Clone());
101}
102
103//________________________________________________________________________
104void AliCorrectionMatrix::SetAxisTitles(const Char_t* titleX, const Char_t* titleY, const Char_t* titleZ)
0ab29cfa 105{
bf21645b 106 //
107 // method for setting the axis titles of the histograms
108 //
109
110 fhMeas ->SetXTitle(titleX); fhMeas ->SetYTitle(titleY); fhMeas ->SetZTitle(titleZ);
111 fhGene ->SetXTitle(titleX); fhGene ->SetYTitle(titleY); fhGene ->SetZTitle(titleZ);
112 fhCorr ->SetXTitle(titleX); fhCorr ->SetYTitle(titleY); fhCorr ->SetZTitle(titleZ);
113}
114
115//____________________________________________________________________
116Long64_t AliCorrectionMatrix::Merge(TCollection* list)
117{
118 // Merge a list of AliCorrectionMatrix objects with this (needed for
119 // PROOF).
120 // Returns the number of merged objects (including this).
121
122 if (!list)
123 return 0;
124
125 if (list->IsEmpty())
126 return 1;
127
128 TIterator* iter = list->MakeIterator();
129 TObject* obj;
130
131 // collections of measured and generated histograms
132 TList* collectionMeas = new TList;
133 TList* collectionGene = new TList;
134
135 Int_t count = 0;
136 while ((obj = iter->Next())) {
137
138 AliCorrectionMatrix* entry = dynamic_cast<AliCorrectionMatrix*> (obj);
139 if (entry == 0)
140 continue;
141
142 collectionMeas->Add(entry->GetMeasuredHistogram());
143 collectionGene->Add(entry->GetGeneratedHistogram());
144
145 count++;
146 }
147 fhMeas->Merge(collectionMeas);
148 fhGene->Merge(collectionGene);
149
150 delete collectionMeas;
151 delete collectionGene;
152
153 return count+1;
154}
155
156//____________________________________________________________________
157void AliCorrectionMatrix::Divide()
158{
159 //
29771dc8 160 // divides generated by measured to get the correction
161 //
bf21645b 162
06e4b91b 163 if (!fhMeas || !fhGene || !fhCorr) {
164 AliDebug(AliLog::kError, "measured or generated histograms not available");
bf21645b 165 return;
06e4b91b 166 }
bf21645b 167
168 fhCorr->Divide(fhGene, fhMeas, 1, 1, "B");
169
1afae8ff 170 Int_t emptyBins = 0;
171 for (Int_t x=1; x<=fhCorr->GetNbinsX(); ++x)
172 for (Int_t y=1; y<=fhCorr->GetNbinsY(); ++y)
173 for (Int_t z=1; z<=fhCorr->GetNbinsZ(); ++z)
174 if (fhCorr->GetBinContent(x, y, z) == 0)
175 ++emptyBins;
176
177 if (emptyBins > 0)
29771dc8 178 printf("INFO: In %s we have %d empty bins (of %d) in the correction map\n", GetTitle(), emptyBins, fhCorr->GetNbinsX() * fhCorr->GetNbinsY() * fhCorr->GetNbinsZ());
bf21645b 179}
180
181//____________________________________________________________________
29771dc8 182void AliCorrectionMatrix::Multiply()
183{
184 //
185 // multiplies measured with correction to get the generated
186 //
187
188 if (!fhMeas || !fhGene || !fhCorr)
189 return;
190
191 fhGene->Multiply(fhMeas, fhCorr, 1, 1, "B");
192}
193
194//____________________________________________________________________
2e88424e 195void AliCorrectionMatrix::Add(AliCorrectionMatrix* aMatrixToAdd, Float_t c) {
196 //
197 // adds the measured and generated of aMatrixToAdd to measured and generated of this
198 //
199 // NB: the correction will naturally stay the same
200
201 fhMeas->Add(aMatrixToAdd->GetMeasuredHistogram(), c);
202 fhGene->Add(aMatrixToAdd->GetGeneratedHistogram(), c);
203}
204
205
206//____________________________________________________________________
29771dc8 207Bool_t AliCorrectionMatrix::LoadHistograms(const Char_t* dir)
bf21645b 208{
209 //
210 // loads the histograms from a file
29771dc8 211 // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
bf21645b 212 //
1afae8ff 213
29771dc8 214 if (!dir)
215 dir = GetName();
1afae8ff 216
29771dc8 217 if (!gDirectory->cd(dir))
bf21645b 218 return kFALSE;
29771dc8 219
220 if (fhGene)
221 {
222 delete fhGene;
223 fhGene=0;
bf21645b 224 }
0ab29cfa 225
29771dc8 226 if (fhCorr)
227 {
228 delete fhCorr;
229 fhCorr=0;
230 }
0ab29cfa 231
29771dc8 232 if (fhMeas)
233 {
234 delete fhMeas;
235 fhMeas=0;
bf21645b 236 }
29771dc8 237
238 fhMeas = dynamic_cast<TH1*> (gDirectory->Get("measured"));
239 if (!fhMeas)
240 Info("LoadHistograms", "No measured hist available");
241
242 fhGene = dynamic_cast<TH1*> (gDirectory->Get("generated"));
243 if (!fhGene)
244 Info("LoadHistograms", "No generated hist available");
245
246 fhCorr = dynamic_cast<TH1*> (gDirectory->Get("correction"));
247
248 Bool_t success = kTRUE;
249 if (!fhCorr)
250 {
251 Info("LoadHistograms", "No correction hist available");
252 success = kFALSE;
253 }
254
255 gDirectory->cd("..");
256
257 return success;
bf21645b 258}
259
260//____________________________________________________________________
261void AliCorrectionMatrix::SaveHistograms()
262{
263 //
264 // saves the histograms
265 //
266
29771dc8 267 gDirectory->mkdir(GetName());
268 gDirectory->cd(GetName());
269
0bd1f8a0 270 if (fhMeas)
271 fhMeas ->Write();
272
273 if (fhGene)
274 fhGene ->Write();
bf21645b 275
276 if (fhCorr)
277 fhCorr->Write();
29771dc8 278
279 gDirectory->cd("..");
bf21645b 280}
281
282//____________________________________________________________________
29771dc8 283void AliCorrectionMatrix::DrawHistograms(const Char_t* canvasName)
bf21645b 284{
285 //
29771dc8 286 // draws all histograms on one TCanvas
287 // if canvasName is 0 the name of this object is taken
bf21645b 288 //
289
29771dc8 290 if (!canvasName)
291 canvasName = Form("%s_canvas", GetName());
292
293 TCanvas* canvas = new TCanvas(canvasName, GetTitle(), 1200, 400);
294 canvas->Divide(3, 1);
bf21645b 295
296 canvas->cd(1);
297 if (fhMeas)
298 fhMeas->Draw("COLZ");
29771dc8 299
bf21645b 300 canvas->cd(2);
301 if (fhGene)
29771dc8 302 {
303 // work around ROOT bug #22011
304 if (fhGene->GetEntries() == 0)
305 fhGene->SetEntries(1);
bf21645b 306 fhGene->Draw("COLZ");
29771dc8 307 }
bf21645b 308
309 canvas->cd(3);
310 if (fhCorr)
311 fhCorr->Draw("COLZ");
bf21645b 312}
0ab29cfa 313
314//____________________________________________________________________
315void AliCorrectionMatrix::ReduceInformation()
316{
317 // this function deletes the measured and generated histograms to reduce the amount of data
318 // in memory
319
320 if (fhMeas)
321 {
322 delete fhMeas;
323 fhMeas = 0;
324 }
325
326 if (fhGene)
327 {
328 delete fhGene;
329 fhGene = 0;
330 }
331}
ef2713c5 332
333//____________________________________________________________________
334void AliCorrectionMatrix::Reset(Option_t* option)
335{
336 // resets the histograms
337
338 if (fhGene)
339 fhGene->Reset(option);
340
341 if (fhMeas)
342 fhMeas->Reset(option);
343
344 if (fhCorr)
345 fhCorr->Reset(option);
346}
29771dc8 347
348//____________________________________________________________________
349void AliCorrectionMatrix::SetCorrectionToUnity()
350{
351 // sets the correction matrix to unity
352
353 if (!fhCorr)
354 return;
355
356 for (Int_t x=1; x<=fhCorr->GetNbinsX(); ++x)
357 for (Int_t y=1; y<=fhCorr->GetNbinsY(); ++y)
358 for (Int_t z=1; z<=fhCorr->GetNbinsZ(); ++z)
3dfa46a4 359 {
29771dc8 360 fhCorr->SetBinContent(x, y, z, 1);
3dfa46a4 361 fhCorr->SetBinError(x, y, z, 0);
362 }
29771dc8 363}
dd367a14 364
365//____________________________________________________________________
366void AliCorrectionMatrix::Scale(Double_t factor)
367{
368 // scales the generated and measured histogram with the given factor
369
370 Printf("Scaling histograms with %f", factor);
371
372 fhMeas->Scale(factor);
373 fhGene->Scale(factor);
374}