added GRP preprocessor
[u/mrichter/AliRoot.git] / PWG0 / AliCorrectionMatrix.cxx
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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
29771dc8 163 if (!fhMeas || !fhGene || !fhCorr)
bf21645b 164 return;
165
166 fhCorr->Divide(fhGene, fhMeas, 1, 1, "B");
167
1afae8ff 168 Int_t emptyBins = 0;
169 for (Int_t x=1; x<=fhCorr->GetNbinsX(); ++x)
170 for (Int_t y=1; y<=fhCorr->GetNbinsY(); ++y)
171 for (Int_t z=1; z<=fhCorr->GetNbinsZ(); ++z)
172 if (fhCorr->GetBinContent(x, y, z) == 0)
173 ++emptyBins;
174
175 if (emptyBins > 0)
29771dc8 176 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 177}
178
179//____________________________________________________________________
29771dc8 180void AliCorrectionMatrix::Multiply()
181{
182 //
183 // multiplies measured with correction to get the generated
184 //
185
186 if (!fhMeas || !fhGene || !fhCorr)
187 return;
188
189 fhGene->Multiply(fhMeas, fhCorr, 1, 1, "B");
190}
191
192//____________________________________________________________________
193Bool_t AliCorrectionMatrix::LoadHistograms(const Char_t* dir)
bf21645b 194{
195 //
196 // loads the histograms from a file
29771dc8 197 // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
bf21645b 198 //
1afae8ff 199
29771dc8 200 if (!dir)
201 dir = GetName();
1afae8ff 202
29771dc8 203 if (!gDirectory->cd(dir))
bf21645b 204 return kFALSE;
29771dc8 205
206 if (fhGene)
207 {
208 delete fhGene;
209 fhGene=0;
bf21645b 210 }
0ab29cfa 211
29771dc8 212 if (fhCorr)
213 {
214 delete fhCorr;
215 fhCorr=0;
216 }
0ab29cfa 217
29771dc8 218 if (fhMeas)
219 {
220 delete fhMeas;
221 fhMeas=0;
bf21645b 222 }
29771dc8 223
224 fhMeas = dynamic_cast<TH1*> (gDirectory->Get("measured"));
225 if (!fhMeas)
226 Info("LoadHistograms", "No measured hist available");
227
228 fhGene = dynamic_cast<TH1*> (gDirectory->Get("generated"));
229 if (!fhGene)
230 Info("LoadHistograms", "No generated hist available");
231
232 fhCorr = dynamic_cast<TH1*> (gDirectory->Get("correction"));
233
234 Bool_t success = kTRUE;
235 if (!fhCorr)
236 {
237 Info("LoadHistograms", "No correction hist available");
238 success = kFALSE;
239 }
240
241 gDirectory->cd("..");
242
243 return success;
bf21645b 244}
245
246//____________________________________________________________________
247void AliCorrectionMatrix::SaveHistograms()
248{
249 //
250 // saves the histograms
251 //
252
29771dc8 253 gDirectory->mkdir(GetName());
254 gDirectory->cd(GetName());
255
0bd1f8a0 256 if (fhMeas)
257 fhMeas ->Write();
258
259 if (fhGene)
260 fhGene ->Write();
bf21645b 261
262 if (fhCorr)
263 fhCorr->Write();
29771dc8 264
265 gDirectory->cd("..");
bf21645b 266}
267
268//____________________________________________________________________
29771dc8 269void AliCorrectionMatrix::DrawHistograms(const Char_t* canvasName)
bf21645b 270{
271 //
29771dc8 272 // draws all histograms on one TCanvas
273 // if canvasName is 0 the name of this object is taken
bf21645b 274 //
275
29771dc8 276 if (!canvasName)
277 canvasName = Form("%s_canvas", GetName());
278
279 TCanvas* canvas = new TCanvas(canvasName, GetTitle(), 1200, 400);
280 canvas->Divide(3, 1);
bf21645b 281
282 canvas->cd(1);
283 if (fhMeas)
284 fhMeas->Draw("COLZ");
29771dc8 285
bf21645b 286 canvas->cd(2);
287 if (fhGene)
29771dc8 288 {
289 // work around ROOT bug #22011
290 if (fhGene->GetEntries() == 0)
291 fhGene->SetEntries(1);
bf21645b 292 fhGene->Draw("COLZ");
29771dc8 293 }
bf21645b 294
295 canvas->cd(3);
296 if (fhCorr)
297 fhCorr->Draw("COLZ");
bf21645b 298}
0ab29cfa 299
300//____________________________________________________________________
301void AliCorrectionMatrix::ReduceInformation()
302{
303 // this function deletes the measured and generated histograms to reduce the amount of data
304 // in memory
305
306 if (fhMeas)
307 {
308 delete fhMeas;
309 fhMeas = 0;
310 }
311
312 if (fhGene)
313 {
314 delete fhGene;
315 fhGene = 0;
316 }
317}
ef2713c5 318
319//____________________________________________________________________
320void AliCorrectionMatrix::Reset(Option_t* option)
321{
322 // resets the histograms
323
324 if (fhGene)
325 fhGene->Reset(option);
326
327 if (fhMeas)
328 fhMeas->Reset(option);
329
330 if (fhCorr)
331 fhCorr->Reset(option);
332}
29771dc8 333
334//____________________________________________________________________
335void AliCorrectionMatrix::SetCorrectionToUnity()
336{
337 // sets the correction matrix to unity
338
339 if (!fhCorr)
340 return;
341
342 for (Int_t x=1; x<=fhCorr->GetNbinsX(); ++x)
343 for (Int_t y=1; y<=fhCorr->GetNbinsY(); ++y)
344 for (Int_t z=1; z<=fhCorr->GetNbinsZ(); ++z)
345 fhCorr->SetBinContent(x, y, z, 1);
346}