[u/mrichter/AliRoot.git] / TPC / AliTPCCalibPedestal.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/


/* $Id$ */


//Root includes
#include <TH1F.h>
#include <TH2F.h>
#include <TString.h>
#include <TMath.h>
#include <TF1.h>
#include <TRandom.h>
#include <TDirectory.h>
#include <TFile.h>
//AliRoot includes
#include "AliRawReader.h"
#include "AliRawReaderRoot.h"
#include "AliRawReaderDate.h"
#include "AliTPCRawStream.h"
#include "AliTPCCalROC.h"
#include "AliTPCROC.h"
#include "AliMathBase.h"
#include "TTreeStream.h"

//date
#include "event.h"

//header file
#include "AliTPCCalibPedestal.h"


///////////////////////////////////////////////////////////////////////////////////////
//          Implementation of the TPC pedestal and noise calibration
//
//   Origin: Jens Wiechula, Marian Ivanov   J.Wiechula@gsi.de, Marian.Ivanov@cern.ch
// 
// 
// *************************************************************************************
// *                                Class Description                                  *
// *************************************************************************************
//
// Working principle:
// ------------------
// Raw pedestal data is processed by calling one of the ProcessEvent(...) functions
// (see below). These in the end call the Update(...) function, where the data is filled
// into histograms.
//
// For each ROC one TH2F histo (ROC channel vs. ADC channel) is created when
// it is filled for the first time (GetHistoPedestal(ROC,kTRUE)). All histos are stored in the
// TObjArray fHistoPedestalArray.
//
// For a fast filling of the histogram the corresponding bin number of the channel and ADC channel
// is computed by hand and the histogram array is accessed directly via its pointer.
// ATTENTION: Doing so the the entry counter of the histogram is not increased
//            this means that e.g. the colz draw option gives an empty plot unless
//	    calling 'histo->SetEntries(1)' before drawing.
//
// After accumulating the desired statistics the Analyse() function has to be called.
// Whithin this function the pedestal and noise values are calculated for each pad, using
// the fast gaus fit function  AliMathBase::FitGaus(...), and the calibration
// storage classes (AliTPCCalROC) are filled for each ROC.
// The calibration information is stored in the TObjArrays fCalRocArrayPedestal and fCalRocArrayRMS;
//
//
//
// User interface for filling data:
// --------------------------------
//
// To Fill information one of the following functions can be used:
//
// Bool_t ProcessEvent(eventHeaderStruct *event);
//   - process Date event
//   - use AliTPCRawReaderDate and call ProcessEvent(AliRawReader *rawReader)
//
// Bool_t ProcessEvent(AliRawReader *rawReader);
//  - process AliRawReader event
//   - use AliTPCRawStream to loop over data and call ProcessEvent(AliTPCRawStream *rawStream)
//
// Bool_t ProcessEvent(AliTPCRawStream *rawStream);
//   - process event from AliTPCRawStream
//   - call Update function for signal filling
//
// Int_t Update(const Int_t isector, const Int_t iRow, const Int_t
//              iPad,  const Int_t iTimeBin, const Float_t signal);
//   - directly  fill signal information (sector, row, pad, time bin, pad)
//     to the reference histograms
//
// It is also possible to merge two independently taken calibrations using the function
//
// void Merge(AliTPCCalibPedestal *ped)
//   - copy histograms in 'ped' if the do not exist in this instance
//   - Add histograms in 'ped' to the histograms in this instance if the allready exist
//   - After merging call Analyse again!
//
//
//
// -- example: filling data using root raw data:
// void fillPedestal(Char_t *filename)
// {
//    rawReader = new AliRawReaderRoot(fileName);
//    if ( !rawReader ) return;
//    AliTPCCalibPedestal *calib = new AliTPCCalibPedestal;
//    while (rawReader->NextEvent()){
//      calib->ProcessEvent(rawReader);
//    }
//    calib->Analyse();
//    calib->DumpToFile("PedestalData.root");
//    delete rawReader;
//    delete calib;
// }
//
//
// What kind of information is stored and how to retrieve them:
// ------------------------------------------------------------
//
// - Accessing the 'Reference Histograms' (pedestal distribution histograms):
//
// TH2F *GetHistoPedestal(Int_t sector);
//
// - Accessing the calibration storage objects:
//
// AliTPCCalROC *GetCalRocPedestal(Int_t sector);  - for the pedestal values
// AliTPCCalROC *GetCalRocNoise(Int_t sector);     - for the Noise values
//
// example for visualisation:
// if the file "PedestalData.root" was created using the above example one could do the following:
//
// TFile filePedestal("PedestalData.root")
// AliTPCCalibPedestal *ped = (AliTPCCalibPedestal*)filePedestal->Get("AliTPCCalibPedestal");
// ped->GetCalRocPedestal(0)->Draw("colz");
// ped->GetCalRocRMS(0)->Draw("colz");
//
// or use the AliTPCCalPad functionality:
// AliTPCCalPad padPedestal(ped->GetCalPadPedestal());
// AliTPCCalPad padNoise(ped->GetCalPadRMS());
// padPedestal->MakeHisto2D()->Draw("colz");  //Draw A-Side Pedestal Information
// padNoise->MakeHisto2D()->Draw("colz");  //Draw A-Side Noise Information
//
/*
 example: fill pedestal with gausschen noise
 AliTPCCalibPedestal ped;
 ped.TestEvent();
 ped.Analyse();
 //Draw output;
 TCanvas* c1 = new TCanvas;
 c1->Divide(1,2);
 c1->cd(1);
 ped.GetHistoPedestal(0)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
 ped.GetHistoPedestal(0)->Draw("colz");
 c1->cd(2);
 ped.GetHistoPedestal(36)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
 ped.GetHistoPedestal(36)->Draw("colz");
 TCanvas* c2 = new TCanvas;
 c2->Divide(2,2);
 c2->cd(1);
 ped.GetCalRocPedestal(0)->Draw("colz");
 c2->cd(2);
 ped.GetCalRocRMS(0)->Draw("colz");
 c2->cd(3);
 ped.GetCalRocPedestal(36)->Draw("colz");
 c2->cd(4);
 ped.GetCalRocRMS(36)->Draw("colz");


*/


ClassImp(AliTPCCalibPedestal)

AliTPCCalibPedestal::AliTPCCalibPedestal() : /*FOLD00*/
  TObject(),
  fFirstTimeBin(60),
  fLastTimeBin(1000),
  fAdcMin(1),
  fAdcMax(100),
  fOldRCUformat(kTRUE),
  fROC(AliTPCROC::Instance()),
  fCalRocArrayPedestal(72),
  fCalRocArrayRMS(72),
  fHistoPedestalArray(72)
{
    //
    // default constructor
    //
}
//_____________________________________________________________________
AliTPCCalibPedestal::AliTPCCalibPedestal(const AliTPCCalibPedestal &ped) : /*FOLD00*/
  TObject(ped),
  fFirstTimeBin(ped.GetFirstTimeBin()),
  fLastTimeBin(ped.GetLastTimeBin()),
  fAdcMin(ped.GetAdcMin()),
  fAdcMax(ped.GetAdcMax()),
  fOldRCUformat(kTRUE),
  fROC(AliTPCROC::Instance()),
  fCalRocArrayPedestal(72),
  fCalRocArrayRMS(72),
  fHistoPedestalArray(72)
{
    //
    // copy constructor
    //
    for (Int_t iSec = 0; iSec < 72; ++iSec){
	const AliTPCCalROC *calPed = (AliTPCCalROC*)ped.fCalRocArrayPedestal.UncheckedAt(iSec);
	const AliTPCCalROC *calRMS = (AliTPCCalROC*)ped.fCalRocArrayRMS.UncheckedAt(iSec);
	const TH2F         *hPed   = (TH2F*)ped.fHistoPedestalArray.UncheckedAt(iSec);

	if ( calPed != 0x0 ) fCalRocArrayPedestal.AddAt(new AliTPCCalROC(*calPed), iSec);
	if ( calRMS != 0x0 ) fCalRocArrayRMS.AddAt(new AliTPCCalROC(*calRMS), iSec);

	if ( hPed != 0x0 ){
	    TH2F *hNew = new TH2F(*hPed);
	    hNew->SetDirectory(0);
	    fHistoPedestalArray.AddAt(hNew,iSec);
	}
    }
}
//_____________________________________________________________________
AliTPCCalibPedestal& AliTPCCalibPedestal::operator = (const  AliTPCCalibPedestal &source)
{
  //
  // assignment operator
  //
  if (&source == this) return *this;
  new (this) AliTPCCalibPedestal(source);

  return *this;
}
//_____________________________________________________________________
AliTPCCalibPedestal::~AliTPCCalibPedestal() /*FOLD00*/
{
  //
  // destructor
  //

    fCalRocArrayPedestal.Delete();
    fCalRocArrayRMS.Delete();
    fHistoPedestalArray.Delete();
}
//_____________________________________________________________________
Int_t AliTPCCalibPedestal::Update(const Int_t icsector, /*FOLD00*/
				const Int_t icRow,
				const Int_t icPad,
				const Int_t icTimeBin,
				const Float_t csignal)
{
    //
    // Signal filling methode 
    //

    //return if we are out of the specified time bin or adc range
    if ( (icTimeBin>fLastTimeBin) || (icTimeBin<fFirstTimeBin) ) return 0;
    if ( ((Int_t)csignal>fAdcMax) || ((Int_t)csignal<fAdcMin)  ) return 0;

    Int_t iChannel  = fROC->GetRowIndexes(icsector)[icRow]+icPad; //  global pad position in sector

    // fast filling methode.
    // Attention: the entry counter of the histogram is not increased
    //            this means that e.g. the colz draw option gives an empty plot
    Int_t bin = (iChannel+1)*(fAdcMax-fAdcMin+2)+((Int_t)csignal-fAdcMin+1);

    GetHistoPedestal(icsector,kTRUE)->GetArray()[bin]++;

    return 0;
}
//_____________________________________________________________________
Bool_t AliTPCCalibPedestal::ProcessEvent(AliTPCRawStream *rawStream)
{
  //
  // Event Processing loop - AliTPCRawStream
  //

  rawStream->SetOldRCUFormat(fOldRCUformat);

  Bool_t withInput = kFALSE;

  while (rawStream->Next()) {

      Int_t isector  = rawStream->GetSector();                       //  current sector
      Int_t iRow     = rawStream->GetRow();                          //  current row
      Int_t iPad     = rawStream->GetPad();                          //  current pad
      Int_t iTimeBin = rawStream->GetTime();                         //  current time bin
      Float_t signal = rawStream->GetSignal();                       //  current ADC signal

      Update(isector,iRow,iPad,iTimeBin,signal);
      withInput = kTRUE;
  }

  return withInput;
}
//_____________________________________________________________________
Bool_t AliTPCCalibPedestal::ProcessEvent(AliRawReader *rawReader)
{
  //
  //  Event processing loop - AliRawReader
  //


  AliTPCRawStream rawStream(rawReader);

  rawReader->Select("TPC");

  return ProcessEvent(&rawStream);
}
//_____________________________________________________________________
Bool_t AliTPCCalibPedestal::ProcessEvent(eventHeaderStruct *event)
{
  //
  //  process date event
  //
    AliRawReader *rawReader = new AliRawReaderDate((void*)event);
    Bool_t result=ProcessEvent(rawReader);
    delete rawReader;
    return result;
}
//_____________________________________________________________________
Bool_t AliTPCCalibPedestal::TestEvent() /*FOLD00*/
{
  //
  //  Test event loop
  // fill one oroc and one iroc with random gaus
  //

    gRandom->SetSeed(0);

    for (UInt_t iSec=0; iSec<72; ++iSec){
        if (iSec%36>0) continue;
	for (UInt_t iRow=0; iRow < fROC->GetNRows(iSec); ++iRow){
	    for (UInt_t iPad=0; iPad < fROC->GetNPads(iSec,iRow); ++iPad){
		for (UInt_t iTimeBin=0; iTimeBin<1024; ++iTimeBin){
		    Float_t signal=(Int_t)(iRow+3+gRandom->Gaus(0,.7));
		    if ( signal>0 )Update(iSec,iRow,iPad,iTimeBin,signal);
		}
	    }
	}
    }
    return kTRUE;
}
//_____________________________________________________________________
TH2F* AliTPCCalibPedestal::GetHisto(Int_t sector, TObjArray *arr, /*FOLD00*/
				  Int_t nbinsY, Float_t ymin, Float_t ymax,
				  Char_t *type, Bool_t force)
{
    //
    // return pointer to Q histogram
    // if force is true create a new histogram if it doesn't exist allready
    //
    if ( !force || arr->UncheckedAt(sector) )
	return (TH2F*)arr->UncheckedAt(sector);

    // if we are forced and histogram doesn't yes exist create it
    Char_t name[255], title[255];

    sprintf(name,"hCalib%s%.2d",type,sector);
    sprintf(title,"%s calibration histogram sector %.2d;ADC channel;Channel (pad)",type,sector);

    // new histogram with Q calib information. One value for each pad!
    TH2F* hist = new TH2F(name,title,
			  nbinsY, ymin, ymax,
			  fROC->GetNChannels(sector),0,fROC->GetNChannels(sector)
			 );
    hist->SetDirectory(0);
    arr->AddAt(hist,sector);
    return hist;
}
//_____________________________________________________________________
TH2F* AliTPCCalibPedestal::GetHistoPedestal(Int_t sector, Bool_t force) /*FOLD00*/
{
    //
    // return pointer to T0 histogram
    // if force is true create a new histogram if it doesn't exist allready
    //
    TObjArray *arr = &fHistoPedestalArray;
    return GetHisto(sector, arr, fAdcMax-fAdcMin, fAdcMin, fAdcMax, "Pedestal", force);
}
//_____________________________________________________________________
AliTPCCalROC* AliTPCCalibPedestal::GetCalRoc(Int_t sector, TObjArray* arr, Bool_t force) /*FOLD00*/
{
    //
    // return pointer to ROC Calibration
    // if force is true create a new histogram if it doesn't exist allready
    //
    if ( !force || arr->UncheckedAt(sector) )
	return (AliTPCCalROC*)arr->UncheckedAt(sector);

    // if we are forced and the histogram doesn't yet exist create it

    // new AliTPCCalROC for T0 information. One value for each pad!
    AliTPCCalROC *croc = new AliTPCCalROC(sector);
    arr->AddAt(croc,sector);
    return croc;
}
//_____________________________________________________________________
AliTPCCalROC* AliTPCCalibPedestal::GetCalRocPedestal(Int_t sector, Bool_t force) /*FOLD00*/
{
    //
    // return pointer to Carge ROC Calibration
    // if force is true create a new histogram if it doesn't exist allready
    //
    TObjArray *arr = &fCalRocArrayPedestal;
    return GetCalRoc(sector, arr, force);
}
//_____________________________________________________________________
AliTPCCalROC* AliTPCCalibPedestal::GetCalRocRMS(Int_t sector, Bool_t force) /*FOLD00*/
{
    //
    // return pointer to signal width ROC Calibration
    // if force is true create a new histogram if it doesn't exist allready
    //
    TObjArray *arr = &fCalRocArrayRMS;
    return GetCalRoc(sector, arr, force);
}
//_____________________________________________________________________
void AliTPCCalibPedestal::Merge(AliTPCCalibPedestal *ped)
{
    //
    //  Merge reference histograms of sig to the current AliTPCCalibSignal
    //

    //merge histograms
    for (Int_t iSec=0; iSec<72; ++iSec){
	TH2F *hRefPedMerge   = ped->GetHistoPedestal(iSec);


	if ( hRefPedMerge ){
	    TDirectory *dir = hRefPedMerge->GetDirectory(); hRefPedMerge->SetDirectory(0);
	    TH2F *hRefPed   = GetHistoPedestal(iSec);
	    if ( hRefPed ) hRefPed->Add(hRefPedMerge);
	    else {
		TH2F *hist = new TH2F(*hRefPedMerge);
                hist->SetDirectory(0);
		fHistoPedestalArray.AddAt(hist, iSec);
	    }
	    hRefPedMerge->SetDirectory(dir);
	}
    }
}
//_____________________________________________________________________
void AliTPCCalibPedestal::Analyse() /*FOLD00*/
{
    //
    //  Calculate calibration constants
    //

    Int_t nbinsAdc = fAdcMax-fAdcMin;

    TVectorD param(3);
    TMatrixD dummy(3,3);

    Float_t *array_hP=0;


    for (Int_t iSec=0; iSec<72; ++iSec){
	TH2F *hP = GetHistoPedestal(iSec);
        if ( !hP ) continue;

	AliTPCCalROC *rocPedestal = GetCalRocPedestal(iSec,kTRUE);
	AliTPCCalROC *rocRMS      = GetCalRocRMS(iSec,kTRUE);

	array_hP = hP->GetArray();
        UInt_t nChannels = fROC->GetNChannels(iSec);

	for (UInt_t iChannel=0; iChannel<nChannels; ++iChannel){
            Int_t offset = (nbinsAdc+2)*(iChannel+1)+1;
	    Double_t ret = AliMathBase::FitGaus(array_hP+offset,nbinsAdc,fAdcMin,fAdcMax,&param,&dummy);
            // if the fitting failed set noise and pedestal to 0
	    if ( ret == -4 ) {
		param[1]=0;
		param[2]=0;
	    }
	    rocPedestal->SetValue(iChannel,param[1]);
            rocRMS->SetValue(iChannel,param[2]);
	}
    }
}
//_____________________________________________________________________
void AliTPCCalibPedestal::DumpToFile(const Char_t *filename, const Char_t *dir, Bool_t append) /*FOLD00*/
{
    //
    //  Write class to file
    //

    TString sDir(dir);
    TString option;

    if ( append )
	option = "update";
    else
        option = "recreate";

    TDirectory *backup = gDirectory;
    TFile f(filename,option.Data());
    f.cd();
    if ( !sDir.IsNull() ){
	f.mkdir(sDir.Data());
	f.cd(sDir);
    }
    this->Write();
    f.Close();

    if ( backup ) backup->cd();
}
Commit	Line	Data
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	/* $Id$ */
8bc7e885	18
8bc7e885	19
8bc7e885	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"
8bc7e885	34	#include "AliTPCCalROC.h"
8bc7e885	35	#include "AliTPCROC.h"
8bc7e885	36	#include "AliMathBase.h"
8bc7e885	37	#include "TTreeStream.h"
8bc7e885	38
bc331d5b	39	//date
	40	#include "event.h"
	41
	42	//header file
	43	#include "AliTPCCalibPedestal.h"
8bc7e885	44
8bc7e885	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	//
153	/*
154	example: fill pedestal with gausschen noise
155	AliTPCCalibPedestal ped;
156	ped.TestEvent();
157	ped.Analyse();
158	//Draw output;
159	TCanvas* c1 = new TCanvas;
160	c1->Divide(1,2);
161	c1->cd(1);
162	ped.GetHistoPedestal(0)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
163	ped.GetHistoPedestal(0)->Draw("colz");
164	c1->cd(2);
165	ped.GetHistoPedestal(36)->SetEntries(1); //needed in order for colz to work, reason: fast filling does not increase the entries counter
166	ped.GetHistoPedestal(36)->Draw("colz");
167	TCanvas* c2 = new TCanvas;
168	c2->Divide(2,2);
169	c2->cd(1);
170	ped.GetCalRocPedestal(0)->Draw("colz");
171	c2->cd(2);
172	ped.GetCalRocRMS(0)->Draw("colz");
173	c2->cd(3);
174	ped.GetCalRocPedestal(36)->Draw("colz");
175	c2->cd(4);
176	ped.GetCalRocRMS(36)->Draw("colz");
8bc7e885	177
8bc7e885	178
aa983e4f	179	*/
8bc7e885	180
	181
	182
aa983e4f	183	ClassImp(AliTPCCalibPedestal)
8bc7e885	184
	185	AliTPCCalibPedestal::AliTPCCalibPedestal() : /FOLD00/
	186	TObject(),
	187	fFirstTimeBin(60),
	188	fLastTimeBin(1000),
	189	fAdcMin(1),
	190	fAdcMax(100),
aa983e4f	191	fOldRCUformat(kTRUE),
8bc7e885	192	fROC(AliTPCROC::Instance()),
	193	fCalRocArrayPedestal(72),
	194	fCalRocArrayRMS(72),
bc331d5b	195	fHistoPedestalArray(72)
8bc7e885	196	{
8bc7e885	197	//
bc331d5b	198	// default constructor
8bc7e885	199	//
8bc7e885	200	}
bc331d5b	201	//_____________________________________________________________________
	202	AliTPCCalibPedestal::AliTPCCalibPedestal(const AliTPCCalibPedestal &ped) : /FOLD00/
	203	TObject(ped),
	204	fFirstTimeBin(ped.GetFirstTimeBin()),
	205	fLastTimeBin(ped.GetLastTimeBin()),
	206	fAdcMin(ped.GetAdcMin()),
	207	fAdcMax(ped.GetAdcMax()),
aa983e4f	208	fOldRCUformat(kTRUE),
bc331d5b	209	fROC(AliTPCROC::Instance()),
	210	fCalRocArrayPedestal(72),
	211	fCalRocArrayRMS(72),
	212	fHistoPedestalArray(72)
	213	{
	214	//
	215	// copy constructor
	216	//
aa983e4f	217	for (Int_t iSec = 0; iSec < 72; ++iSec){
bc331d5b	218	const AliTPCCalROC calPed = (AliTPCCalROC)ped.fCalRocArrayPedestal.UncheckedAt(iSec);
	219	const AliTPCCalROC calRMS = (AliTPCCalROC)ped.fCalRocArrayRMS.UncheckedAt(iSec);
	220	const TH2F hPed = (TH2F)ped.fHistoPedestalArray.UncheckedAt(iSec);
	221
	222	if ( calPed != 0x0 ) fCalRocArrayPedestal.AddAt(new AliTPCCalROC(*calPed), iSec);
	223	if ( calRMS != 0x0 ) fCalRocArrayRMS.AddAt(new AliTPCCalROC(*calRMS), iSec);
	224
	225	if ( hPed != 0x0 ){
	226	TH2F hNew = new TH2F(hPed);
	227	hNew->SetDirectory(0);
	228	fHistoPedestalArray.AddAt(hNew,iSec);
	229	}
	230	}
	231	}
	232	//_____________________________________________________________________
	233	AliTPCCalibPedestal& AliTPCCalibPedestal::operator = (const AliTPCCalibPedestal &source)
	234	{
	235	//
	236	// assignment operator
	237	//
	238	if (&source == this) return *this;
	239	new (this) AliTPCCalibPedestal(source);
8bc7e885	240
bc331d5b	241	return *this;
bc331d5b	242	}
8bc7e885	243	//_____________________________________________________________________
	244	AliTPCCalibPedestal::~AliTPCCalibPedestal() /FOLD00/
	245	{
	246	//
	247	// destructor
	248	//
8bc7e885	249
aa983e4f	250	fCalRocArrayPedestal.Delete();
	251	fCalRocArrayRMS.Delete();
	252	fHistoPedestalArray.Delete();
aa983e4f	253	}
8bc7e885	254	//_____________________________________________________________________
	255	Int_t AliTPCCalibPedestal::Update(const Int_t icsector, /FOLD00/
	256	const Int_t icRow,
	257	const Int_t icPad,
	258	const Int_t icTimeBin,
	259	const Float_t csignal)
	260	{
	261	//
	262	// Signal filling methode
	263	//
aa983e4f	264
	265	//return if we are out of the specified time bin or adc range
	266	if ( (icTimeBin>fLastTimeBin) \|\| (icTimeBin<fFirstTimeBin) ) return 0;
	267	if ( ((Int_t)csignal>fAdcMax) \|\| ((Int_t)csignal<fAdcMin) ) return 0;
8bc7e885	268
	269	Int_t iChannel = fROC->GetRowIndexes(icsector)[icRow]+icPad; // global pad position in sector
	270
bc331d5b	271	// fast filling methode.
8bc7e885	272	// Attention: the entry counter of the histogram is not increased
8bc7e885	273	// this means that e.g. the colz draw option gives an empty plot
aa983e4f	274	Int_t bin = (iChannel+1)*(fAdcMax-fAdcMin+2)+((Int_t)csignal-fAdcMin+1);
8bc7e885	275
	276	GetHistoPedestal(icsector,kTRUE)->GetArray()[bin]++;
	277
	278	return 0;
	279	}
	280	//_____________________________________________________________________
bc331d5b	281	Bool_t AliTPCCalibPedestal::ProcessEvent(AliTPCRawStream *rawStream)
8bc7e885	282	{
8bc7e885	283	//
bc331d5b	284	// Event Processing loop - AliTPCRawStream
8bc7e885	285	//
8bc7e885	286
aa983e4f	287	rawStream->SetOldRCUFormat(fOldRCUformat);
8bc7e885	288
	289	Bool_t withInput = kFALSE;
	290
bc331d5b	291	while (rawStream->Next()) {
8bc7e885	292
bc331d5b	293	Int_t isector = rawStream->GetSector(); // current sector
	294	Int_t iRow = rawStream->GetRow(); // current row
	295	Int_t iPad = rawStream->GetPad(); // current pad
	296	Int_t iTimeBin = rawStream->GetTime(); // current time bin
	297	Float_t signal = rawStream->GetSignal(); // current ADC signal
8bc7e885	298
	299	Update(isector,iRow,iPad,iTimeBin,signal);
	300	withInput = kTRUE;
	301	}
	302
8bc7e885	303	return withInput;
	304	}
	305	//_____________________________________________________________________
bc331d5b	306	Bool_t AliTPCCalibPedestal::ProcessEvent(AliRawReader *rawReader)
	307	{
	308	//
	309	// Event processing loop - AliRawReader
	310	//
	311
	312
	313	AliTPCRawStream rawStream(rawReader);
	314
	315	rawReader->Select("TPC");
	316
	317	return ProcessEvent(&rawStream);
	318	}
	319	//_____________________________________________________________________
	320	Bool_t AliTPCCalibPedestal::ProcessEvent(eventHeaderStruct *event)
	321	{
	322	//
	323	// process date event
	324	//
	325	AliRawReader rawReader = new AliRawReaderDate((void)event);
	326	Bool_t result=ProcessEvent(rawReader);
	327	delete rawReader;
	328	return result;
	329	}
	330	//_____________________________________________________________________
8bc7e885	331	Bool_t AliTPCCalibPedestal::TestEvent() /FOLD00/
	332	{
	333	//
	334	// Test event loop
bc331d5b	335	// fill one oroc and one iroc with random gaus
8bc7e885	336	//
	337
	338	gRandom->SetSeed(0);
	339
aa983e4f	340	for (UInt_t iSec=0; iSec<72; ++iSec){
8bc7e885	341	if (iSec%36>0) continue;
aa983e4f	342	for (UInt_t iRow=0; iRow < fROC->GetNRows(iSec); ++iRow){
	343	for (UInt_t iPad=0; iPad < fROC->GetNPads(iSec,iRow); ++iPad){
	344	for (UInt_t iTimeBin=0; iTimeBin<1024; ++iTimeBin){
bc331d5b	345	Float_t signal=(Int_t)(iRow+3+gRandom->Gaus(0,.7));
8bc7e885	346	if ( signal>0 )Update(iSec,iRow,iPad,iTimeBin,signal);
	347	}
	348	}
	349	}
	350	}
	351	return kTRUE;
	352	}
	353	//_____________________________________________________________________
bc331d5b	354	TH2F* AliTPCCalibPedestal::GetHisto(Int_t sector, TObjArray arr, /FOLD00*/
8bc7e885	355	Int_t nbinsY, Float_t ymin, Float_t ymax,
	356	Char_t *type, Bool_t force)
	357	{
	358	//
	359	// return pointer to Q histogram
	360	// if force is true create a new histogram if it doesn't exist allready
	361	//
	362	if ( !force \|\| arr->UncheckedAt(sector) )
bc331d5b	363	return (TH2F*)arr->UncheckedAt(sector);
8bc7e885	364
	365	// if we are forced and histogram doesn't yes exist create it
	366	Char_t name[255], title[255];
	367
	368	sprintf(name,"hCalib%s%.2d",type,sector);
bc331d5b	369	sprintf(title,"%s calibration histogram sector %.2d;ADC channel;Channel (pad)",type,sector);
8bc7e885	370
8bc7e885	371	// new histogram with Q calib information. One value for each pad!
bc331d5b	372	TH2F* hist = new TH2F(name,title,
8bc7e885	373	nbinsY, ymin, ymax,
	374	fROC->GetNChannels(sector),0,fROC->GetNChannels(sector)
	375	);
	376	hist->SetDirectory(0);
	377	arr->AddAt(hist,sector);
	378	return hist;
	379	}
	380	//_____________________________________________________________________
bc331d5b	381	TH2F* AliTPCCalibPedestal::GetHistoPedestal(Int_t sector, Bool_t force) /FOLD00/
8bc7e885	382	{
	383	//
	384	// return pointer to T0 histogram
	385	// if force is true create a new histogram if it doesn't exist allready
	386	//
	387	TObjArray *arr = &fHistoPedestalArray;
	388	return GetHisto(sector, arr, fAdcMax-fAdcMin, fAdcMin, fAdcMax, "Pedestal", force);
	389	}
	390	//_____________________________________________________________________
	391	AliTPCCalROC* AliTPCCalibPedestal::GetCalRoc(Int_t sector, TObjArray* arr, Bool_t force) /FOLD00/
	392	{
	393	//
	394	// return pointer to ROC Calibration
	395	// if force is true create a new histogram if it doesn't exist allready
	396	//
	397	if ( !force \|\| arr->UncheckedAt(sector) )
	398	return (AliTPCCalROC*)arr->UncheckedAt(sector);
	399
aa983e4f	400	// if we are forced and the histogram doesn't yet exist create it
8bc7e885	401
	402	// new AliTPCCalROC for T0 information. One value for each pad!
	403	AliTPCCalROC *croc = new AliTPCCalROC(sector);
8bc7e885	404	arr->AddAt(croc,sector);
	405	return croc;
	406	}
	407	//_____________________________________________________________________
	408	AliTPCCalROC* AliTPCCalibPedestal::GetCalRocPedestal(Int_t sector, Bool_t force) /FOLD00/
	409	{
	410	//
	411	// return pointer to Carge ROC Calibration
	412	// if force is true create a new histogram if it doesn't exist allready
	413	//
	414	TObjArray *arr = &fCalRocArrayPedestal;
	415	return GetCalRoc(sector, arr, force);
	416	}
	417	//_____________________________________________________________________
	418	AliTPCCalROC* AliTPCCalibPedestal::GetCalRocRMS(Int_t sector, Bool_t force) /FOLD00/
	419	{
	420	//
	421	// return pointer to signal width ROC Calibration
	422	// if force is true create a new histogram if it doesn't exist allready
	423	//
	424	TObjArray *arr = &fCalRocArrayRMS;
	425	return GetCalRoc(sector, arr, force);
	426	}
	427	//_____________________________________________________________________
aa983e4f	428	void AliTPCCalibPedestal::Merge(AliTPCCalibPedestal *ped)
	429	{
	430	//
	431	// Merge reference histograms of sig to the current AliTPCCalibSignal
	432	//
	433
	434	//merge histograms
	435	for (Int_t iSec=0; iSec<72; ++iSec){
	436	TH2F *hRefPedMerge = ped->GetHistoPedestal(iSec);
	437
	438
	439	if ( hRefPedMerge ){
	440	TDirectory *dir = hRefPedMerge->GetDirectory(); hRefPedMerge->SetDirectory(0);
	441	TH2F *hRefPed = GetHistoPedestal(iSec);
	442	if ( hRefPed ) hRefPed->Add(hRefPedMerge);
	443	else {
	444	TH2F hist = new TH2F(hRefPedMerge);
	445	hist->SetDirectory(0);
	446	fHistoPedestalArray.AddAt(hist, iSec);
	447	}
	448	hRefPedMerge->SetDirectory(dir);
	449	}
	450	}
	451	}
	452	//_____________________________________________________________________
8bc7e885	453	void AliTPCCalibPedestal::Analyse() /FOLD00/
	454	{
	455	//
	456	// Calculate calibration constants
	457	//
	458
	459	Int_t nbinsAdc = fAdcMax-fAdcMin;
	460
8bc7e885	461	TVectorD param(3);
bc331d5b	462	TMatrixD dummy(3,3);
8bc7e885	463
bc331d5b	464	Float_t *array_hP=0;
8bc7e885	465
8bc7e885	466
aa983e4f	467	for (Int_t iSec=0; iSec<72; ++iSec){
bc331d5b	468	TH2F *hP = GetHistoPedestal(iSec);
8bc7e885	469	if ( !hP ) continue;
	470
	471	AliTPCCalROC *rocPedestal = GetCalRocPedestal(iSec,kTRUE);
	472	AliTPCCalROC *rocRMS = GetCalRocRMS(iSec,kTRUE);
	473
	474	array_hP = hP->GetArray();
	475	UInt_t nChannels = fROC->GetNChannels(iSec);
	476
aa983e4f	477	for (UInt_t iChannel=0; iChannel<nChannels; ++iChannel){
bc331d5b	478	Int_t offset = (nbinsAdc+2)*(iChannel+1)+1;
	479	Double_t ret = AliMathBase::FitGaus(array_hP+offset,nbinsAdc,fAdcMin,fAdcMax,&param,&dummy);
	480	// if the fitting failed set noise and pedestal to 0
	481	if ( ret == -4 ) {
	482	param[1]=0;
	483	param[2]=0;
	484	}
	485	rocPedestal->SetValue(iChannel,param[1]);
	486	rocRMS->SetValue(iChannel,param[2]);
8bc7e885	487	}
8bc7e885	488	}
8bc7e885	489	}
	490	//_____________________________________________________________________
	491	void AliTPCCalibPedestal::DumpToFile(const Char_t filename, const Char_t dir, Bool_t append) /FOLD00/
	492	{
	493	//
	494	// Write class to file
	495	//
	496
8bc7e885	497	TString sDir(dir);
	498	TString option;
	499
	500	if ( append )
	501	option = "update";
	502	else
	503	option = "recreate";
	504
bc331d5b	505	TDirectory *backup = gDirectory;
8bc7e885	506	TFile f(filename,option.Data());
bc331d5b	507	f.cd();
8bc7e885	508	if ( !sDir.IsNull() ){
	509	f.mkdir(sDir.Data());
	510	f.cd(sDir);
	511	}
bc331d5b	512	this->Write();
8bc7e885	513	f.Close();
	514
	515	if ( backup ) backup->cd();
8bc7e885	516	}