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8bc7e885 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
8bc7e885 17/* $Id$ */
18
8bc7e885 19
20//Root includes
8bc7e885 21#include <TH1F.h>
8bc7e885 22#include <TH2F.h>
8bc7e885 23#include <TString.h>
8bc7e885 24#include <TMath.h>
25#include <TF1.h>
26#include <TRandom.h>
8bc7e885 27#include <TDirectory.h>
8bc7e885 28#include <TFile.h>
8bc7e885 29//AliRoot includes
30#include "AliRawReader.h"
31#include "AliRawReaderRoot.h"
bc331d5b 32#include "AliRawReaderDate.h"
8bc7e885 33#include "AliTPCRawStream.h"
34#include "AliTPCCalROC.h"
8bc7e885 35#include "AliTPCROC.h"
8bc7e885 36#include "AliMathBase.h"
8bc7e885 37#include "TTreeStream.h"
38
bc331d5b 39//date
40#include "event.h"
41
42//header file
43#include "AliTPCCalibPedestal.h"
8bc7e885 44
45
aa983e4f 46///////////////////////////////////////////////////////////////////////////////////////
47// Implementation of the TPC pedestal and noise calibration
48//
49// Origin: Jens Wiechula, Marian Ivanov J.Wiechula@gsi.de, Marian.Ivanov@cern.ch
50//
51//
52// *************************************************************************************
53// * Class Description *
54// *************************************************************************************
55//
56// Working principle:
57// ------------------
58// Raw pedestal data is processed by calling one of the ProcessEvent(...) functions
59// (see below). These in the end call the Update(...) function, where the data is filled
60// into histograms.
61//
62// For each ROC one TH2F histo (ROC channel vs. ADC channel) is created when
63// it is filled for the first time (GetHistoPedestal(ROC,kTRUE)). All histos are stored in the
64// TObjArray fHistoPedestalArray.
65//
66// For a fast filling of the histogram the corresponding bin number of the channel and ADC channel
67// is computed by hand and the histogram array is accessed directly via its pointer.
68// ATTENTION: Doing so the the entry counter of the histogram is not increased
69// this means that e.g. the colz draw option gives an empty plot unless
70// calling 'histo->SetEntries(1)' before drawing.
71//
72// After accumulating the desired statistics the Analyse() function has to be called.
73// Whithin this function the pedestal and noise values are calculated for each pad, using
74// the fast gaus fit function AliMathBase::FitGaus(...), and the calibration
75// storage classes (AliTPCCalROC) are filled for each ROC.
76// The calibration information is stored in the TObjArrays fCalRocArrayPedestal and fCalRocArrayRMS;
77//
78//
79//
80// User interface for filling data:
81// --------------------------------
82//
83// To Fill information one of the following functions can be used:
84//
85// Bool_t ProcessEvent(eventHeaderStruct *event);
86// - process Date event
87// - use AliTPCRawReaderDate and call ProcessEvent(AliRawReader *rawReader)
88//
89// Bool_t ProcessEvent(AliRawReader *rawReader);
90// - process AliRawReader event
91// - use AliTPCRawStream to loop over data and call ProcessEvent(AliTPCRawStream *rawStream)
92//
93// Bool_t ProcessEvent(AliTPCRawStream *rawStream);
94// - process event from AliTPCRawStream
95// - call Update function for signal filling
96//
97// Int_t Update(const Int_t isector, const Int_t iRow, const Int_t
98// iPad, const Int_t iTimeBin, const Float_t signal);
99// - directly fill signal information (sector, row, pad, time bin, pad)
100// to the reference histograms
101//
102// It is also possible to merge two independently taken calibrations using the function
103//
104// void Merge(AliTPCCalibPedestal *ped)
105// - copy histograms in 'ped' if the do not exist in this instance
106// - Add histograms in 'ped' to the histograms in this instance if the allready exist
107// - After merging call Analyse again!
108//
109//
110//
111// -- example: filling data using root raw data:
112// void fillPedestal(Char_t *filename)
113// {
114// rawReader = new AliRawReaderRoot(fileName);
115// if ( !rawReader ) return;
116// AliTPCCalibPedestal *calib = new AliTPCCalibPedestal;
117// while (rawReader->NextEvent()){
118// calib->ProcessEvent(rawReader);
119// }
120// calib->Analyse();
121// calib->DumpToFile("PedestalData.root");
122// delete rawReader;
123// delete calib;
124// }
125//
126//
127// What kind of information is stored and how to retrieve them:
128// ------------------------------------------------------------
129//
130// - Accessing the 'Reference Histograms' (pedestal distribution histograms):
131//
132// TH2F *GetHistoPedestal(Int_t sector);
133//
134// - Accessing the calibration storage objects:
135//
136// AliTPCCalROC *GetCalRocPedestal(Int_t sector); - for the pedestal values
137// AliTPCCalROC *GetCalRocNoise(Int_t sector); - for the Noise values
138//
139// example for visualisation:
140// if the file "PedestalData.root" was created using the above example one could do the following:
141//
142// TFile filePedestal("PedestalData.root")
143// AliTPCCalibPedestal *ped = (AliTPCCalibPedestal*)filePedestal->Get("AliTPCCalibPedestal");
144// ped->GetCalRocPedestal(0)->Draw("colz");
145// ped->GetCalRocRMS(0)->Draw("colz");
146//
147// or use the AliTPCCalPad functionality:
148// AliTPCCalPad padPedestal(ped->GetCalPadPedestal());
149// AliTPCCalPad padNoise(ped->GetCalPadRMS());
150// padPedestal->MakeHisto2D()->Draw("colz"); //Draw A-Side Pedestal Information
151// padNoise->MakeHisto2D()->Draw("colz"); //Draw A-Side Noise Information
152//
bdf99a93 153
aa983e4f 154/*
155 example: fill pedestal with gausschen noise
156 AliTPCCalibPedestal ped;
157 ped.TestEvent();
158 ped.Analyse();
159 //Draw output;
160 TCanvas* c1 = new TCanvas;
161 c1->Divide(1,2);
162 c1->cd(1);
163 ped.GetHistoPedestal(0)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
164 ped.GetHistoPedestal(0)->Draw("colz");
165 c1->cd(2);
166 ped.GetHistoPedestal(36)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
167 ped.GetHistoPedestal(36)->Draw("colz");
168 TCanvas* c2 = new TCanvas;
169 c2->Divide(2,2);
170 c2->cd(1);
171 ped.GetCalRocPedestal(0)->Draw("colz");
172 c2->cd(2);
173 ped.GetCalRocRMS(0)->Draw("colz");
174 c2->cd(3);
175 ped.GetCalRocPedestal(36)->Draw("colz");
176 c2->cd(4);
177 ped.GetCalRocRMS(36)->Draw("colz");
aa983e4f 178*/
8bc7e885 179
bdf99a93 180//
181// Time dependent pedestals:
182//
183// If wished there is the possibility to calculate for each channel and time bin
184// the mean pedestal [pedestals(t)]. This is done by
185//
186// 1) setting SetTimeAnalysis(kTRUE),
187// 2) processing the data by looping over the events using ProcessEvent(..)
188// 3) calling the Analyse() and AnalyseTime(nevents) functions (providing nevents)
189// 4) getting the pedestals(t) using TArrayF **timePed = calibPedestal.GetTimePedestals();
190// 5) looking at values using timePed[row][pad].At(timebin)
191//
192// This functionality is intended to be used on an LDC bu the detector algorithm
193// (TPCPEDESTALda) to generate a data set used for configuration of the pattern
194// memory for baseline subtraction in the ALTROs. Later the information should also
195// be stored as reference data.
196//
8bc7e885 197
198
aa983e4f 199ClassImp(AliTPCCalibPedestal)
8bc7e885 200
201AliTPCCalibPedestal::AliTPCCalibPedestal() : /*FOLD00*/
202 TObject(),
203 fFirstTimeBin(60),
204 fLastTimeBin(1000),
205 fAdcMin(1),
206 fAdcMax(100),
aa983e4f 207 fOldRCUformat(kTRUE),
bdf99a93 208 fTimeAnalysis(kFALSE),
8bc7e885 209 fROC(AliTPCROC::Instance()),
210 fCalRocArrayPedestal(72),
211 fCalRocArrayRMS(72),
bdf99a93 212 fHistoPedestalArray(72),
213 fTimeSignal(NULL)
8bc7e885 214{
bdf99a93 215 //
216 // default constructor
217 //
8bc7e885 218}
bdf99a93 219
220
bc331d5b 221//_____________________________________________________________________
222AliTPCCalibPedestal::AliTPCCalibPedestal(const AliTPCCalibPedestal &ped) : /*FOLD00*/
223 TObject(ped),
224 fFirstTimeBin(ped.GetFirstTimeBin()),
225 fLastTimeBin(ped.GetLastTimeBin()),
226 fAdcMin(ped.GetAdcMin()),
227 fAdcMax(ped.GetAdcMax()),
bdf99a93 228 fOldRCUformat(ped.fOldRCUformat),
229 fTimeAnalysis(ped.fTimeAnalysis),
bc331d5b 230 fROC(AliTPCROC::Instance()),
231 fCalRocArrayPedestal(72),
232 fCalRocArrayRMS(72),
bdf99a93 233 fHistoPedestalArray(72),
234 fTimeSignal(ped.fTimeSignal)
bc331d5b 235{
bdf99a93 236 //
237 // copy constructor
238 //
239 for (Int_t iSec = 0; iSec < 72; ++iSec){
240 const AliTPCCalROC *calPed = (AliTPCCalROC*)ped.fCalRocArrayPedestal.UncheckedAt(iSec);
241 const AliTPCCalROC *calRMS = (AliTPCCalROC*)ped.fCalRocArrayRMS.UncheckedAt(iSec);
242 const TH2F *hPed = (TH2F*)ped.fHistoPedestalArray.UncheckedAt(iSec);
243
244 if ( calPed != 0x0 ) fCalRocArrayPedestal.AddAt(new AliTPCCalROC(*calPed), iSec);
245 if ( calRMS != 0x0 ) fCalRocArrayRMS.AddAt(new AliTPCCalROC(*calRMS), iSec);
246
247 if ( hPed != 0x0 ){
248 TH2F *hNew = new TH2F(*hPed);
249 hNew->SetDirectory(0);
250 fHistoPedestalArray.AddAt(hNew,iSec);
bc331d5b 251 }
bdf99a93 252 }
bc331d5b 253}
bdf99a93 254
255
bc331d5b 256//_____________________________________________________________________
257AliTPCCalibPedestal& AliTPCCalibPedestal::operator = (const AliTPCCalibPedestal &source)
258{
259 //
260 // assignment operator
261 //
262 if (&source == this) return *this;
263 new (this) AliTPCCalibPedestal(source);
8bc7e885 264
bc331d5b 265 return *this;
266}
bdf99a93 267
268
8bc7e885 269//_____________________________________________________________________
270AliTPCCalibPedestal::~AliTPCCalibPedestal() /*FOLD00*/
271{
272 //
273 // destructor
274 //
8bc7e885 275
bdf99a93 276 fCalRocArrayPedestal.Delete();
277 fCalRocArrayRMS.Delete();
278 fHistoPedestalArray.Delete();
279
280 if ( fTimeSignal ) {
281 for (Int_t i = 0; i < 159; i++) {
282 delete [] fTimeSignal[i];
283 fTimeSignal[i] = 0;
284 }
285 delete [] fTimeSignal;
286 fTimeSignal = 0;
287 }
288}
289
290
291//_____________________________________________________________________
292void AliTPCCalibPedestal::SetTimeAnalysis(Bool_t time)
293{
294 //
295 // Use time dependent analysis: Pedestals are analysed as a function
296 // of the drift time. There is one mean value generated for each time
297 // bin and each channel. It can be used as reference data and for
298 // configuration of the ALTRO pattern memory for baseline subtraction.
299 //
300 // ATTENTION: Use only on LDC in TPCPEDESTALda! On a LDC we get data
301 // only from one sector. For the full TPC we would need a lot of
302 // memory (36*159*140*1024*4bytes = 3.3GB)!
303 //
304
305 fTimeAnalysis = time;
306
307 if ( !fTimeAnalysis ) return;
308
309 // prepare array for one sector (159*140*1024*4bytes = 92MB):
310 fTimeSignal = new TArrayF*[159];
311 for (Int_t i = 0; i < 159; i++) { // padrows
312 fTimeSignal[i] = new TArrayF[140];
313 for (Int_t j = 0; j < 140; j++) { // pads per row
314 fTimeSignal[i][j].Set(1024);
315 for (Int_t k = 0; k < 1024; k++) { // time bins per pad
316 fTimeSignal[i][j].AddAt(0., k);
317 }
318 }
319 }
aa983e4f 320}
bdf99a93 321
322
8bc7e885 323//_____________________________________________________________________
324Int_t AliTPCCalibPedestal::Update(const Int_t icsector, /*FOLD00*/
bdf99a93 325 const Int_t icRow,
326 const Int_t icPad,
327 const Int_t icTimeBin,
328 const Float_t csignal)
8bc7e885 329{
bdf99a93 330 //
331 // Signal filling method
332 //
aa983e4f 333
bdf99a93 334 // Time dependent pedestals
335 if ( fTimeAnalysis ) {
336 if ( icsector < 36 ) // IROC
337 fTimeSignal[icRow][icPad].AddAt(fTimeSignal[icRow][icPad].At(icTimeBin)+csignal, icTimeBin);
338 else
339 fTimeSignal[icRow+63][icPad].AddAt(fTimeSignal[icRow+63][icPad].At(icTimeBin)+csignal, icTimeBin);
340 }
341 //return if we are out of the specified time bin or adc range
342 if ( (icTimeBin>fLastTimeBin) || (icTimeBin<fFirstTimeBin) ) return 0;
343 if ( ((Int_t)csignal>fAdcMax) || ((Int_t)csignal<fAdcMin) ) return 0;
8bc7e885 344
bdf99a93 345 Int_t iChannel = fROC->GetRowIndexes(icsector)[icRow]+icPad; // global pad position in sector
8bc7e885 346
bdf99a93 347 // fast filling methode.
348 // Attention: the entry counter of the histogram is not increased
349 // this means that e.g. the colz draw option gives an empty plot
350 Int_t bin = (iChannel+1)*(fAdcMax-fAdcMin+2)+((Int_t)csignal-fAdcMin+1);
8bc7e885 351
bdf99a93 352 GetHistoPedestal(icsector,kTRUE)->GetArray()[bin]++;
8bc7e885 353
bdf99a93 354 return 0;
8bc7e885 355}
bdf99a93 356
357
8bc7e885 358//_____________________________________________________________________
bc331d5b 359Bool_t AliTPCCalibPedestal::ProcessEvent(AliTPCRawStream *rawStream)
8bc7e885 360{
361 //
bc331d5b 362 // Event Processing loop - AliTPCRawStream
8bc7e885 363 //
364
aa983e4f 365 rawStream->SetOldRCUFormat(fOldRCUformat);
8bc7e885 366
367 Bool_t withInput = kFALSE;
368
bc331d5b 369 while (rawStream->Next()) {
8bc7e885 370
bdf99a93 371 Int_t iSector = rawStream->GetSector(); // current ROC
372 Int_t iRow = rawStream->GetRow(); // current row
373 Int_t iPad = rawStream->GetPad(); // current pad
374 Int_t iTimeBin = rawStream->GetTime(); // current time bin
375 Float_t signal = rawStream->GetSignal(); // current ADC signal
376
377 Update(iSector,iRow,iPad,iTimeBin,signal);
378 withInput = kTRUE;
8bc7e885 379 }
380
8bc7e885 381 return withInput;
382}
bdf99a93 383
384
8bc7e885 385//_____________________________________________________________________
bc331d5b 386Bool_t AliTPCCalibPedestal::ProcessEvent(AliRawReader *rawReader)
387{
388 //
389 // Event processing loop - AliRawReader
390 //
391
bc331d5b 392 AliTPCRawStream rawStream(rawReader);
bc331d5b 393 rawReader->Select("TPC");
bc331d5b 394 return ProcessEvent(&rawStream);
395}
bdf99a93 396
397
bc331d5b 398//_____________________________________________________________________
399Bool_t AliTPCCalibPedestal::ProcessEvent(eventHeaderStruct *event)
400{
401 //
402 // process date event
403 //
bdf99a93 404
405 AliRawReader *rawReader = new AliRawReaderDate((void*)event);
406 Bool_t result=ProcessEvent(rawReader);
407 delete rawReader;
408 return result;
bc331d5b 409}
bdf99a93 410
411
bc331d5b 412//_____________________________________________________________________
8bc7e885 413Bool_t AliTPCCalibPedestal::TestEvent() /*FOLD00*/
414{
415 //
416 // Test event loop
bc331d5b 417 // fill one oroc and one iroc with random gaus
8bc7e885 418 //
419
420 gRandom->SetSeed(0);
421
aa983e4f 422 for (UInt_t iSec=0; iSec<72; ++iSec){
8bc7e885 423 if (iSec%36>0) continue;
aa983e4f 424 for (UInt_t iRow=0; iRow < fROC->GetNRows(iSec); ++iRow){
425 for (UInt_t iPad=0; iPad < fROC->GetNPads(iSec,iRow); ++iPad){
426 for (UInt_t iTimeBin=0; iTimeBin<1024; ++iTimeBin){
bc331d5b 427 Float_t signal=(Int_t)(iRow+3+gRandom->Gaus(0,.7));
8bc7e885 428 if ( signal>0 )Update(iSec,iRow,iPad,iTimeBin,signal);
429 }
430 }
431 }
432 }
433 return kTRUE;
434}
bdf99a93 435
436
8bc7e885 437//_____________________________________________________________________
bc331d5b 438TH2F* AliTPCCalibPedestal::GetHisto(Int_t sector, TObjArray *arr, /*FOLD00*/
8bc7e885 439 Int_t nbinsY, Float_t ymin, Float_t ymax,
440 Char_t *type, Bool_t force)
441{
442 //
443 // return pointer to Q histogram
444 // if force is true create a new histogram if it doesn't exist allready
445 //
446 if ( !force || arr->UncheckedAt(sector) )
bc331d5b 447 return (TH2F*)arr->UncheckedAt(sector);
8bc7e885 448
449 // if we are forced and histogram doesn't yes exist create it
450 Char_t name[255], title[255];
451
452 sprintf(name,"hCalib%s%.2d",type,sector);
bc331d5b 453 sprintf(title,"%s calibration histogram sector %.2d;ADC channel;Channel (pad)",type,sector);
8bc7e885 454
455 // new histogram with Q calib information. One value for each pad!
bc331d5b 456 TH2F* hist = new TH2F(name,title,
8bc7e885 457 nbinsY, ymin, ymax,
458 fROC->GetNChannels(sector),0,fROC->GetNChannels(sector)
459 );
460 hist->SetDirectory(0);
461 arr->AddAt(hist,sector);
462 return hist;
463}
bdf99a93 464
465
8bc7e885 466//_____________________________________________________________________
bc331d5b 467TH2F* AliTPCCalibPedestal::GetHistoPedestal(Int_t sector, Bool_t force) /*FOLD00*/
8bc7e885 468{
469 //
470 // return pointer to T0 histogram
471 // if force is true create a new histogram if it doesn't exist allready
472 //
473 TObjArray *arr = &fHistoPedestalArray;
474 return GetHisto(sector, arr, fAdcMax-fAdcMin, fAdcMin, fAdcMax, "Pedestal", force);
475}
bdf99a93 476
477
8bc7e885 478//_____________________________________________________________________
479AliTPCCalROC* AliTPCCalibPedestal::GetCalRoc(Int_t sector, TObjArray* arr, Bool_t force) /*FOLD00*/
480{
481 //
482 // return pointer to ROC Calibration
483 // if force is true create a new histogram if it doesn't exist allready
484 //
485 if ( !force || arr->UncheckedAt(sector) )
486 return (AliTPCCalROC*)arr->UncheckedAt(sector);
487
aa983e4f 488 // if we are forced and the histogram doesn't yet exist create it
8bc7e885 489
490 // new AliTPCCalROC for T0 information. One value for each pad!
491 AliTPCCalROC *croc = new AliTPCCalROC(sector);
8bc7e885 492 arr->AddAt(croc,sector);
493 return croc;
494}
bdf99a93 495
496
8bc7e885 497//_____________________________________________________________________
498AliTPCCalROC* AliTPCCalibPedestal::GetCalRocPedestal(Int_t sector, Bool_t force) /*FOLD00*/
499{
500 //
501 // return pointer to Carge ROC Calibration
502 // if force is true create a new histogram if it doesn't exist allready
503 //
504 TObjArray *arr = &fCalRocArrayPedestal;
505 return GetCalRoc(sector, arr, force);
506}
bdf99a93 507
508
8bc7e885 509//_____________________________________________________________________
510AliTPCCalROC* AliTPCCalibPedestal::GetCalRocRMS(Int_t sector, Bool_t force) /*FOLD00*/
511{
512 //
513 // return pointer to signal width ROC Calibration
514 // if force is true create a new histogram if it doesn't exist allready
515 //
516 TObjArray *arr = &fCalRocArrayRMS;
517 return GetCalRoc(sector, arr, force);
518}
bdf99a93 519
520
8bc7e885 521//_____________________________________________________________________
aa983e4f 522void AliTPCCalibPedestal::Merge(AliTPCCalibPedestal *ped)
523{
bdf99a93 524 //
525 // Merge reference histograms of sig to the current AliTPCCalibSignal
526 //
aa983e4f 527
bdf99a93 528 // merge histograms
529 for (Int_t iSec=0; iSec<72; ++iSec){
530 TH2F *hRefPedMerge = ped->GetHistoPedestal(iSec);
531
532 if ( hRefPedMerge ){
533 TDirectory *dir = hRefPedMerge->GetDirectory(); hRefPedMerge->SetDirectory(0);
534 TH2F *hRefPed = GetHistoPedestal(iSec);
535 if ( hRefPed ) hRefPed->Add(hRefPedMerge);
536 else {
537 TH2F *hist = new TH2F(*hRefPedMerge);
538 hist->SetDirectory(0);
539 fHistoPedestalArray.AddAt(hist, iSec);
540 }
541 hRefPedMerge->SetDirectory(dir);
542 }
543 }
aa983e4f 544
bdf99a93 545 // merge array
546 // ...
aa983e4f 547
aa983e4f 548}
bdf99a93 549
550
aa983e4f 551//_____________________________________________________________________
8bc7e885 552void AliTPCCalibPedestal::Analyse() /*FOLD00*/
553{
bdf99a93 554 //
555 // Calculate calibration constants
556 //
8bc7e885 557
bdf99a93 558 Int_t nbinsAdc = fAdcMax-fAdcMin;
8bc7e885 559
bdf99a93 560 TVectorD param(3);
561 TMatrixD dummy(3,3);
8bc7e885 562
bdf99a93 563 Float_t *array_hP=0;
8bc7e885 564
bdf99a93 565 for (Int_t iSec=0; iSec<72; ++iSec){
566 TH2F *hP = GetHistoPedestal(iSec);
567 if ( !hP ) continue;
8bc7e885 568
bdf99a93 569 AliTPCCalROC *rocPedestal = GetCalRocPedestal(iSec,kTRUE);
570 AliTPCCalROC *rocRMS = GetCalRocRMS(iSec,kTRUE);
8bc7e885 571
bdf99a93 572 array_hP = hP->GetArray();
573 UInt_t nChannels = fROC->GetNChannels(iSec);
8bc7e885 574
bdf99a93 575 for (UInt_t iChannel=0; iChannel<nChannels; ++iChannel){
576 Int_t offset = (nbinsAdc+2)*(iChannel+1)+1;
577 Double_t ret = AliMathBase::FitGaus(array_hP+offset,nbinsAdc,fAdcMin,fAdcMax,&param,&dummy);
578 // if the fitting failed set noise and pedestal to 0
579 if ( ret == -4 ) {
580 param[1]=0;
581 param[2]=0;
582 }
583 rocPedestal->SetValue(iChannel,param[1]);
584 rocRMS->SetValue(iChannel,param[2]);
585 }
586 }
587}
8bc7e885 588
bdf99a93 589
590//_____________________________________________________________________
591void AliTPCCalibPedestal::AnalyseTime(Int_t nevents)
592{
593 //
594 // Calculate for each channel and time bin the mean pedestal. This
595 // is used on LDC by TPCPEDESTALda to generate data used for configuration
596 // of the pattern memory for baseline subtraction in the ALTROs.
597 //
598
599 if ( nevents <= 0 ) return;
600 if ( fTimeAnalysis ) {
601 for (Int_t i = 0; i < 159; i++) { // padrows
602 for (Int_t j = 0; j < 140; j++) { // pads per row
603 for (Int_t k = 0; k < 1024; k++) { // time bins per pad
604 fTimeSignal[i][j].AddAt(fTimeSignal[i][j].At(k)/(Float_t)nevents, k);
8bc7e885 605 }
bdf99a93 606 }
8bc7e885 607 }
bdf99a93 608 }
8bc7e885 609}
bdf99a93 610
611
8bc7e885 612//_____________________________________________________________________
613void AliTPCCalibPedestal::DumpToFile(const Char_t *filename, const Char_t *dir, Bool_t append) /*FOLD00*/
614{
bdf99a93 615 //
616 // Write class to file
617 //
8bc7e885 618
bdf99a93 619 TString sDir(dir);
620 TString option;
8bc7e885 621
bdf99a93 622 if ( append )
623 option = "update";
624 else
625 option = "recreate";
8bc7e885 626
bdf99a93 627 TDirectory *backup = gDirectory;
628 TFile f(filename,option.Data());
629 f.cd();
630 if ( !sDir.IsNull() ){
631 f.mkdir(sDir.Data());
632 f.cd(sDir);
633 }
634 this->Write();
635 f.Close();
8bc7e885 636
bdf99a93 637 if ( backup ) backup->cd();
8bc7e885 638}