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BEmcProfile.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file BEmcProfile.cc
1 #include "BEmcProfile.h"
2 #include "BEmcCluster.h"
3 
4 #include <TFile.h>
5 #include <TH1.h> // for TH1F
6 #include <TMath.h>
7 #include <TROOT.h>
8 
9 #include <boost/format.hpp>
10 
11 #include <cmath> // for sqrt, log, pow, fabs
12 #include <cstdlib> // for abs
13 #include <iostream>
14 #include <memory> // for allocator_traits<>::value_type
15 
16 using namespace std;
17 
18 const int NP = 4; // Number of profiles in a bin
19 
20 BEmcProfile::BEmcProfile(const string& fname)
21  : bloaded(false)
22  , thresh(0.01)
23  , nen(0)
24  , nth(0)
25  , energy_array(0)
26  , theta_array(0)
27  , hmean(0)
28  , hsigma(0)
29  , m_Verbosity(0)
30 {
31  TFile* f = new TFile(fname.c_str());
32  if (f->IsZombie())
33  {
34  cout << "BEmcProfile: Error when opening profile data file " << fname << endl;
35  return;
36  }
37 
38  gROOT->cd();
39 
40  TH1F* hen = (TH1F*) f->Get("hen");
41  if (!hen)
42  {
43  cout << "BEmcProfile: Error when loading profile data: hen" << endl;
44  f->Close();
45  return;
46  }
47 
48  TH1F* hth = (TH1F*) f->Get("hth");
49  if (!hth)
50  {
51  cout << "BEmcProfile: Error when loading profile data: hth" << endl;
52  f->Close();
53  return;
54  }
55 
56  nen = hen->GetNbinsX();
57  nth = hth->GetNbinsX();
58 
59  energy_array = new float[nen];
60  for (int i = 0; i < nen; i++) energy_array[i] = hen->GetBinContent(i + 1);
61  theta_array = new float[nth];
62  for (int i = 0; i < nth; i++) theta_array[i] = hth->GetBinContent(i + 1);
63 
64  if (Verbosity())
65  {
66  cout << "BEmcProfile: Loading profile data from file " << fname << endl;
67 
68  cout << " " << nen << " bins in energy: ";
69  for (int i = 0; i < nen; i++)
70  {
71  cout << boost::format("%4.1f, ") % energy_array[i];
72  }
73  cout << endl;
74  cout << " " << nth << " bins in theta: ";
75  for (int i = 0; i < nth; i++)
76  {
77  cout << boost::format("%4.2f, ") % theta_array[i];
78  }
79  cout << endl;
80  }
81  hmean = new TH1F*[nen * nth * NP];
82  hsigma = new TH1F*[nen * nth * NP];
83  hr4 = new TH1F*[nen * nth];
84 
85  TH1F* hh;
86  int ii = 0;
87  int ii2 = 0;
88 
89  string hname;
90  for (int it = 0; it < nth; it++)
91  {
92  for (int ie = 0; ie < nen; ie++)
93  {
94  for (int ip = 0; ip < NP; ip++)
95  {
96  hname = boost::str(boost::format("hmean%d_en%d_t%d") % (ip + 1) % ie % it);
97  hh = (TH1F*) f->Get(hname.c_str());
98  if (!hh)
99  {
100  cout << "BEmcProfile: Could not load histogram " << hname
101  << ", Error when loading profile data for hmean it = "
102  << it << ", ie = " << ie << "ip = " << ip << endl;
103  f->Close();
104  return;
105  }
106  hmean[ii] = (TH1F*) hh->Clone();
107 
108  hname = boost::str(boost::format("hsigma%d_en%d_t%d") % (ip + 1) % ie % it);
109  hh = (TH1F*) f->Get(hname.c_str());
110  if (!hh)
111  {
112  cout << "BEmcProfile: Could not load histogram " << hname
113  << ", Error when loading profile data for hsigma it = "
114  << it << ", ie = " << ie << ", ip = " << ip << endl;
115  f->Close();
116  return;
117  }
118  hsigma[ii] = (TH1F*) hh->Clone();
119 
120  ii++;
121  }
122 
123  hname = boost::str(boost::format("hr4_en%d_t%d") % ie % it);
124  hh = (TH1F*) f->Get(hname.c_str());
125 
126  if (!hh)
127  {
128  cout << "BEmcProfile: Error when loading profile data for hr4 it = "
129  << it << ", ie = " << ie << endl;
130  f->Close();
131  return;
132  }
133  hr4[ii2] = (TH1F*) hh->Clone();
134  ii2++;
135 
136  }
137  }
138 
139  f->Close();
140  bloaded = true;
141 }
142 
143 BEmcProfile::~BEmcProfile()
144 {
145  if (bloaded)
146  {
147  delete[] energy_array;
148  delete[] theta_array;
149  for (int i = 0; i < nth * nen * NP; i++)
150  {
151  delete hmean[i];
152  delete hsigma[i];
153  }
154  delete[] hmean;
155  delete[] hsigma;
156 
157  for (int i = 0; i < nth * nen; i++)
158  {
159  delete hr4[i];
160  }
161  delete[] hr4;
162  }
163 }
164 
165 float BEmcProfile::GetProb(std::vector<EmcModule>* plist, int NX, float en, float theta, float phi)
166 {
167  float enoise = 0.01; // 10 MeV per tower
168 
169  if (!bloaded)
170  {
171  // cout << "Error in BEmcProfile::GetProb: profiles not loaded" << endl;
172  return -1;
173  }
174 
175  int nn = plist->size();
176  if (nn <= 0) return -1;
177 
178  // z coordinate below means x coordinate
179 
180  float ee;
181  int ich, iy, iz;
182 
183  int iy0 = -1, iz0 = -1;
184  float emax = 0;
185  for (int i = 0; i < nn; i++)
186  {
187  ee = (*plist)[i].amp;
188  if (ee > emax)
189  {
190  emax = ee;
191  ich = (*plist)[i].ich;
192  iy0 = ich / NX;
193  iz0 = ich % NX;
194  }
195  }
196  if (emax <= 0) return -1;
197 
198  float etot = 0;
199  float sz = 0;
200  float sy = 0;
201  for (int i = 0; i < nn; i++)
202  {
203  ee = (*plist)[i].amp;
204  ich = (*plist)[i].ich;
205  iy = ich / NX;
206  iz = ich % NX;
207  if (ee > thresh && abs(iz - iz0) <= 3 && abs(iy - iy0) <= 3)
208  {
209  etot += ee;
210  sz += iz * ee;
211  sy += iy * ee;
212  }
213  }
214  float zcg = sz / etot;
215  float ycg = sy / etot;
216  int iz0cg = int(zcg + 0.5);
217  int iy0cg = int(ycg + 0.5);
218  float ddz = fabs(zcg - iz0cg);
219  float ddy = fabs(ycg - iy0cg);
220 
221  int isz = 1;
222  if (zcg - iz0cg < 0) isz = -1;
223  int isy = 1;
224  if (ycg - iy0cg < 0) isy = -1;
225 
226  // 4 central towers: 43
227  // 12
228  // Tower 1 - central one
229  float e1, e2, e3, e4;
230  e1 = GetTowerEnergy(iy0cg, iz0cg, plist, NX);
231  e2 = GetTowerEnergy(iy0cg, iz0cg + isz, plist, NX);
232  e3 = GetTowerEnergy(iy0cg + isy, iz0cg + isz, plist, NX);
233  e4 = GetTowerEnergy(iy0cg + isy, iz0cg, plist, NX);
234  if (e1 < thresh) e1 = 0;
235  if (e2 < thresh) e2 = 0;
236  if (e3 < thresh) e3 = 0;
237  if (e4 < thresh) e4 = 0;
238 
239  float e1t = (e1 + e2 + e3 + e4) / etot;
240  float e2t = (e1 + e2 - e3 - e4) / etot;
241  float e3t = (e1 - e2 - e3 + e4) / etot;
242  float e4t = (e3) / etot;
243  // float rr = sqrt((0.5-ddz)*(0.5-ddz)+(0.5-ddy)*(0.5-ddy));
244 
245  // Predicted values
246  float ep[NP];
247  float err[NP];
248  for (int ip = 0; ip < NP; ip++)
249  {
250  PredictEnergy(ip, en, theta, phi, ddz, ddy, ep[ip], err[ip]);
251  if (ep[ip] < 0) return -1;
252  if (ip < 3)
253  err[ip] = sqrt(err[ip] * err[ip] + 4 * enoise * enoise / etot / etot);
254  else
255  err[ip] = sqrt(err[ip] * err[ip] + 1 * enoise * enoise / etot / etot);
256  }
257 
258  float chi2 = 0.;
259  chi2 += (ep[0] - e1t) * (ep[0] - e1t) / err[0] / err[0];
260  chi2 += (ep[1] - e2t) * (ep[1] - e2t) / err[1] / err[1];
261  chi2 += (ep[2] - e3t) * (ep[2] - e3t) / err[2] / err[2];
262  chi2 += (ep[3] - e4t) * (ep[3] - e4t) / err[3] / err[3];
263  int ndf = 4;
264 
265  float prob = TMath::Prob(chi2, ndf);
266 
267  return prob;
268 }
269 
270 /*
271 float BEmcProfile::GetProbTest(std::vector<EmcModule>* plist, int NX, float en, float theta, float& test_rr, float& test_et, float& test_ep, float& test_err)
272 // This is only for test purposes. Can be removed if not needed
273 {
274  int nn = plist->size();
275  if( nn <= 0 ) return -1;
276 
277  // z coordinate below means x coordinate
278 
279  float ee;
280  int ich, iy, iz;
281 
282  int iy0=-1, iz0=-1;
283  float emax=0;
284  for( int i=0; i<nn; i++ ) {
285  ee = (*plist)[i].amp;
286  if( ee>emax ) {
287  emax = ee;
288  ich = (*plist)[i].ich;
289  iy0 = ich/NX;
290  iz0 = ich%NX;
291  }
292  }
293  if( emax<=0 ) return -1;
294 
295  float etot=0;
296  float sz=0;
297  float sy=0;
298  for( int i=0; i<nn; i++ ) {
299  ee = (*plist)[i].amp;
300  ich = (*plist)[i].ich;
301  iy = ich/NX;
302  iz = ich%NX;
303  if( ee>thresh && abs(iz-iz0)<=3 && abs(iy-iy0)<=3 ) {
304  etot += ee;
305  sz += iz*ee;
306  sy += iy*ee;
307  }
308  }
309  float zcg = sz/etot;
310  float ycg = sy/etot;
311  int iz0cg = int(zcg+0.5);
312  int iy0cg = int(ycg+0.5);
313  float ddz = fabs(zcg-iz0cg);
314  float ddy = fabs(ycg-iy0cg);
315 
316  int isz = 1;
317  if( zcg-iz0cg < 0 ) isz = -1;
318  int isy = 1;
319  if( ycg-iy0cg < 0 ) isy = -1;
320 
321  // 4 central towers: 43
322  // 12
323  // Tower 1 - central one
324  float e1, e2, e3, e4;
325  e1 = GetTowerEnergy(iy0cg, iz0cg, plist, NX);
326  e2 = GetTowerEnergy(iy0cg, iz0cg+isz, plist, NX);
327  e3 = GetTowerEnergy(iy0cg+isy,iz0cg+isz, plist, NX);
328  e4 = GetTowerEnergy(iy0cg+isy,iz0cg, plist, NX);
329  if( e1<thresh ) e1 = 0;
330  if( e2<thresh ) e2 = 0;
331  if( e3<thresh ) e3 = 0;
332  if( e4<thresh ) e4 = 0;
333 
334  float e1t = (e1+e2+e3+e4)/etot;
335  float e2t = (e1+e2-e3-e4)/etot;
336  float e3t = (e1-e2-e3+e4)/etot;
337  float e4t = (e3)/etot;
338  float rr = sqrt((0.5-ddz)*(0.5-ddz)+(0.5-ddy)*(0.5-ddy));
339 
340  // Predicted values
341  float ep[NP];
342  float err[NP];
343  for( int ip=0; ip<NP; ip++ )
344  PredictEnergy(ip, en, theta, ddz, ddy, ep[ip], err[ip]);
345 
346  float chi2 = 0.;
347  chi2 += (ep[0]-e1t)*(ep[0]-e1t)/err[0]/err[0];
348  chi2 += (ep[1]-e2t)*(ep[1]-e2t)/err[1]/err[1];
349  chi2 += (ep[2]-e3t)*(ep[2]-e3t)/err[2]/err[2];
350  chi2 += (ep[3]-e4t)*(ep[3]-e4t)/err[3]/err[3];
351  int ndf = 4;
352 
353  float prob = TMath::Prob(chi2, ndf);
354 
355  test_rr = rr;
356  test_et = e1t;
357  test_ep = ep[0];
358  test_err = err[0];
359 
360  return prob;
361 }
362 */
363 
364 void BEmcProfile::PredictEnergy(int ip, float energy, float theta, float /*phi*/, float ddz, float ddy, float& ep, float& err)
365 // ip changes from 0 to NP-1, meaning the profile index 1,2,..,NP
366 {
367  ep = err = -1;
368 
369  if (!bloaded)
370  {
371  //cout << "Error in BEmcProfile::PredictEnergy: profiles not loaded" << endl;
372  return;
373  }
374 
375  if (ip < 0 || ip >= NP)
376  {
377  cout << "Error in BEmcProfile::PredictEnergy: profile index = "
378  << ip << " but should be from 0 to " << NP - 1 << endl;
379  return;
380  }
381 
382  if (energy <= 0)
383  {
384  cout << "Error in BEmcProfile::PredictEnergy: energy = "
385  << energy << " but should be >0" << endl;
386  return;
387  }
388  if (theta < 0)
389  {
390  cout << "Error in BEmcProfile::PredictEnergy: theta = "
391  << theta << " but should be >=0" << endl;
392  return;
393  }
394 
395  if (ddz < 0 || ddz > 0.5)
396  {
397  cout << "Error in BEmcProfile::PredictEnergy: ddz = "
398  << ddz << " but should be from 0 to 0.5" << endl;
399  }
400 
401  if (ddy < 0 || ddy > 0.5)
402  {
403  cout << "Error in BEmcProfile::PredictEnergy: ddy = "
404  << ddy << " but should be from 0 to 0.5" << endl;
405  }
406 
407  // Safety margin (slightly away from bin edge)
408  // if (ddz < 0.021) ddz = 0.021;
409  // if (ddz > 0.489) ddz = 0.489;
410  // if (ddy < 0.021) ddy = 0.021;
411  // if (ddy > 0.489) ddy = 0.489;
412 
413  // Energy bin
414  int ie2 = 0;
415  while (ie2 < nen && energy > energy_array[ie2]) ie2++;
416  if (ie2 == 0)
417  ie2 = 1;
418  else if (ie2 >= nen)
419  ie2 = nen - 1;
420  int ie1 = ie2 - 1;
421  // int ie1 = ie2-2; // For a test()
422 
423  // Theta bin
424  int it2 = 0;
425  while (it2 < nth && theta > theta_array[it2]) it2++;
426  if (it2 == 0)
427  it2 = 1;
428  else if (it2 >= nth)
429  it2 = nth - 1;
430  int it1 = it2 - 1;
431  // int it1 = it2-2; // For a test()
432 
433  // cout << "Energy bin= " << ie1 << " " << ie2 << " ("
434  // << energy << ") Theta bin= " << it1 << " " << it2
435  // << " (" << theta << ")" << endl;
436 
437  float rr = sqrt((0.5 - ddz) * (0.5 - ddz) + (0.5 - ddy) * (0.5 - ddy));
438 
439  float xx = rr;
440  if (ip == 1)
441  xx = ddy;
442  else if (ip == 2)
443  xx = ddz;
444 
445  float en1 = energy_array[ie1];
446  float en2 = energy_array[ie2];
447  float th1 = theta_array[it1];
448  float th2 = theta_array[it2];
449 
450  // 1st index - ie, second index - it
451  int ii11 = ip + ie1 * NP + it1 * nen * NP;
452  int ii21 = ip + ie2 * NP + it1 * nen * NP;
453  int ii12 = ip + ie1 * NP + it2 * nen * NP;
454  int ii22 = ip + ie2 * NP + it2 * nen * NP;
455 
456  int ibin = hmean[ii11]->FindBin(xx);
457 
458  // Log (1/sqrt) energy dependence of mean (sigma)
459  //
460  float pr11 = hmean[ii11]->GetBinContent(ibin);
461  float pr21 = hmean[ii21]->GetBinContent(ibin);
462  float prt1 = pr11 + (pr21 - pr11) / (log(en2) - log(en1)) * (log(energy) - log(en1));
463  if (prt1 < 0) prt1 = 0;
464 
465  float er11 = hsigma[ii11]->GetBinContent(ibin);
466  float er21 = hsigma[ii21]->GetBinContent(ibin);
467  float ert1 = er11 + (er21 - er11) / (1. / sqrt(en2) - 1. / sqrt(en1)) * (1. / sqrt(energy) - 1. / sqrt(en1));
468  if (ert1 < 0) ert1 = 0;
469 
470  float pr12 = hmean[ii12]->GetBinContent(ibin);
471  float pr22 = hmean[ii22]->GetBinContent(ibin);
472  float prt2 = pr12 + (pr22 - pr12) / (log(en2) - log(en1)) * (log(energy) - log(en1));
473  if (prt2 < 0) prt2 = 0;
474 
475  float er12 = hsigma[ii12]->GetBinContent(ibin);
476  float er22 = hsigma[ii22]->GetBinContent(ibin);
477  float ert2 = er12 + (er22 - er12) / (1. / sqrt(en2) - 1. / sqrt(en1)) * (1. / sqrt(energy) - 1. / sqrt(en1));
478  if (ert2 < 0) ert2 = 0;
479 
480  // Quadratic theta dependence of mean and sigma
481  //
482  float pr = prt1 + (prt2 - prt1) / (pow(th2, 2) - pow(th1, 2)) * (pow(theta, 2) - pow(th1, 2));
483  if (pr < 0) pr = 0;
484  float er = ert1 + (ert2 - ert1) / (pow(th2, 2) - pow(th1, 2)) * (pow(theta, 2) - pow(th1, 2));
485  if (er < 0) er = 0;
486 
487  // Additional error due to binning in xx
488  //
489  int ibin1 = ibin;
490  if (ibin > 1) ibin1 = ibin - 1;
491  int ibin2 = ibin;
492  if (ibin < hmean[ii11]->GetNbinsX())
493  {
494  if (hmean[ii11]->GetBinContent(ibin + 1) > 0)
495  {
496  ibin2 = ibin + 1;
497  }
498  }
499  float dd = (hmean[ii11]->GetBinContent(ibin2) -
500  hmean[ii11]->GetBinContent(ibin1)) /
501  2.;
502  // if( fabs(dd)>er )
503  // {
504  // cout << "ie = " << ie1 << ", it = " << it1 << ", bin = "
505  // << ibin << ": " << er << " " << dd << endl;
506  // }
507  er = sqrt(er * er + dd * dd);
508 
509  ep = pr;
510  err = er;
511 }
512 
513 
514 float BEmcProfile::PredictEnergyR(float energy, float theta, float /*phi*/, float rr)
515 {
516 
517  if (!bloaded)
518  {
519  // cout << "Error in BEmcProfile::PredictEnergyR: profiles not loaded" << endl;
520  return 0;
521  }
522 
523  if (energy <= 0)
524  {
525  cout << "Error in BEmcProfile::PredictEnergyR: energy = " << energy
526  << " but should be >0" << endl;
527  return 0;
528  }
529  if (theta < 0)
530  {
531  cout << "Error in BEmcProfile::PredictEnergyR: theta = " << theta
532  << " but should be >=0" << endl;
533  return 0;
534  }
535 
536  if (rr < 1 )
537  {
538  cout << "Error in BEmcProfile::PredictEnergyR: rr = " << rr
539  << " but should be >1" << endl;
540  }
541 
542  // Energy bin
543  int ie2 = 0;
544  while (ie2 < nen && energy > energy_array[ie2]) ie2++;
545  if (ie2 == 0)
546  ie2 = 1;
547  else if (ie2 >= nen)
548  ie2 = nen - 1;
549  int ie1 = ie2 - 1;
550  // int ie1 = ie2-2; // For a test()
551 
552  // Theta bin
553  int it2 = 0;
554  while (it2 < nth && theta > theta_array[it2]) it2++;
555  if (it2 == 0)
556  it2 = 1;
557  else if (it2 >= nth)
558  it2 = nth - 1;
559  int it1 = it2 - 1;
560  // int it1 = it2-2; // For a test()
561 
562  // printf("Energy bin= %d %d (%f) Theta bin= %d %d (%f)\n",ie1,ie2,energy,it1,it2,theta);
563 
564  float en1 = energy_array[ie1];
565  float en2 = energy_array[ie2];
566  float th1 = theta_array[it1];
567  float th2 = theta_array[it2];
568 
569  // 1st index - ie, second index - it
570  int ii11 = ie1 + it1 * nen;
571  int ii21 = ie2 + it1 * nen;
572  int ii12 = ie1 + it2 * nen;
573  int ii22 = ie2 + it2 * nen;
574 
575  int ibin = hr4[ii11]->FindBin(rr);
576 
577  // Log (1/sqrt) energy dependence of mean (sigma)
578  //
579  float pr11 = hr4[ii11]->GetBinContent(ibin);
580  float pr21 = hr4[ii21]->GetBinContent(ibin);
581  float prt1 = pr11 + (pr21 - pr11) / (log(en2) - log(en1)) * (log(energy) - log(en1));
582  if (prt1 < 0) prt1 = 0;
583 
584  float pr12 = hr4[ii12]->GetBinContent(ibin);
585  float pr22 = hr4[ii22]->GetBinContent(ibin);
586  float prt2 = pr12 + (pr22 - pr12) / (log(en2) - log(en1)) * (log(energy) - log(en1));
587  if (prt2 < 0) prt2 = 0;
588 
589  // Quadratic theta dependence of mean and sigma
590  //
591  float pr = prt1 + (prt2 - prt1) / (pow(th2, 2) - pow(th1, 2)) * (pow(theta, 2) - pow(th1, 2));
592  if (pr < 0) pr = 0;
593 
594  return pr;
595 }
596 
597 
598 float BEmcProfile::GetTowerEnergy(int iy, int iz, std::vector<EmcModule>* plist, int NX)
599 {
600  int nn = plist->size();
601  if (nn <= 0) return 0;
602 
603  for (int i = 0; i < nn; i++)
604  {
605  int ich = (*plist)[i].ich;
606  int iyt = ich / NX;
607  int izt = ich % NX;
608  if (iy == iyt && iz == izt)
609  {
610  return (*plist)[i].amp;
611  }
612  }
613  return 0;
614 }