[u/mrichter/AliRoot.git] / TPC / Base / AliTPCTempMap.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.                  *
 **************************************************************************/


///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  TPC calibration class for temperature maps and tendencies                //
//  (based on TPC Temperature Sensors and FiniteElement Simulation)          //
//                                                                           //
//  Authors: Stefan Rossegger, Haavard Helstrup                              //
//                                                                           //
//  Note: Obvioulsy some changes by Marian, but when ???                     //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "AliTPCSensorTempArray.h"
#include "TLinearFitter.h"
#include "TString.h"
#include "TGraph2D.h"
#include "TTimeStamp.h"

#include "AliTPCTempMap.h"


ClassImp(AliTPCTempMap)
  
  const char kStringFEsimulation[] = "FEsimulation.txt";

//_____________________________________________________________________________
AliTPCTempMap::AliTPCTempMap(AliTPCSensorTempArray *sensorDCS):
  TNamed(),
  fTempArray(0),
  fStringFEsimulation(kStringFEsimulation)
{
  //
  // AliTPCTempMap default constructor
  //

  fTempArray = sensorDCS;

}

//_____________________________________________________________________________
AliTPCTempMap::AliTPCTempMap(const AliTPCTempMap &c):
  TNamed(c),
  fTempArray(c.fTempArray),
  fStringFEsimulation(c.fStringFEsimulation)
{
  //
  // AliTPCTempMap copy constructor
  //

}

//_____________________________________________________________________________
AliTPCTempMap::~AliTPCTempMap()
{
  //
  // AliTPCTempMap destructor
  //
  
}

//_____________________________________________________________________________
AliTPCTempMap &AliTPCTempMap::operator=(const AliTPCTempMap &c)
{
  //
  // Assignment operator
  //

  if (this != &c) ((AliTPCTempMap &) c).Copy(*this);
  return *this;

}

//_____________________________________________________________________________
void AliTPCTempMap::Copy(TObject &c) const
{
  //
  // Copy function
  //
  
  TObject::Copy(c);
  
}

//_____________________________________________________________________________

Double_t AliTPCTempMap::GetTempGradientY(UInt_t timeSec, Int_t side){
 //
 // Extract Linear Vertical Temperature Gradient [K/cm] within the TPC on 
 // Shaft Side(A): 0
 // Muon  Side(C): 1
 // Values based on TemperatureSensors within the TPC ( type: 3 (TPC) )
 //
 // FIXME: Also return residual-distribution, covariance Matrix
 //        or simply chi2 for validity check? 
 //        -> better use GetLinearFitter - function in this case!
  
 TLinearFitter *fitter = new TLinearFitter(3,"x0++x1++x2");
 TVectorD param(3);
 Int_t i = 0;

 Int_t nsensors = fTempArray->NumSensors();
 for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
   AliTPCSensorTemp *entry = (AliTPCSensorTemp*)fTempArray->GetSensorNum(isensor);
   
   if (entry->GetType()==3 && entry->GetSide()==side) { // take SensorType:TPC 
     Double_t x[3];
     x[0]=1;
     x[1]=entry->GetX();
     x[2]=entry->GetY();    
     Double_t y = fTempArray->GetValue(timeSec,isensor); // get temperature value
     if (IsOK(y)) fitter->AddPoint(x,y,1); // add values to LinearFitter
     i++;
   }

 }  
 fitter->Eval();
 fitter->GetParameters(param);

 fitter->~TLinearFitter();

 return param[2]; // return vertical (Y) tempGradient in [K/cm]
  
}

//_____________________________________________________________________________
TLinearFitter *AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, TTimeStamp &stamp)
{
  //
  // absolute time stamp used
  // see AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, UInt_t timeSec) for details
  //
  Int_t timeSec = stamp.GetSec()-fTempArray->GetStartTime().GetSec();
  return GetLinearFitter(type,side,timeSec);
}

//_____________________________________________________________________________
TLinearFitter *AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, UInt_t timeSec)
{
  // 
  // Creates a TlinearFitter object for the desired region of the TPC 
  // (via choosen type and side of TPC temperature sensors) at a given 
  // timeSec (in secounds) after start time
  // type: 0 ... ReadOutChambers (ROC)
  //       1 ... OuterContainmentVessel (OFC)
  //       2 ... InnerContainmentVessel (IFC) + ThermalScreener (TS)
  //       3 ... Within the TPC (DriftVolume) (TPC)
  //       4 ... Only InnerContainmentVessel (IFC) 
  // side: Can be choosen for type 0 and 3 (otherwise it will be ignored in 
  //       in order to get all temperature sensors of interest)
  //       0 ... Shaft Side (A)
  //       1 ... Muon Side (C)
  // 

  TLinearFitter *fitter = new TLinearFitter(3);
  Double_t x[3]={0};
  Double_t y = 0;
  const Float_t kMaxDelta=0.5;
  
  if (type == 1 || type == 2 || type == 4) {
    fitter->SetFormula("x0++x1++TMath::Sin(x2)"); // returns Z,Y gradient
  } else {
    fitter->SetFormula("x0++x1++x2"); // returns X,Y gradient
  }

  Int_t i = 0;
  Int_t nsensors = fTempArray->NumSensors();

  Float_t temps[1000];
  for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
    AliTPCSensorTemp *entry = (AliTPCSensorTemp*)fTempArray->GetSensorNum(isensor);
    if (entry->GetType()==type && entry->GetSide()==side){
      Float_t temperature= fTempArray->GetValue(timeSec,isensor); // get temperature value
      if (IsOK(temperature)) {temps[i]=temperature; i++;}
    }
  }
  Float_t medianTemp = TMath::Median(i, temps);
  if (i<3) return 0;
  Float_t rmsTemp = TMath::RMS(i, temps);
  
  i=0;
  
  for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
    AliTPCSensorTemp *entry = (AliTPCSensorTemp*)fTempArray->GetSensorNum(isensor);
    
    if (type==0 || type==3) { // 'side' information used
      if (entry->GetType()==type && entry->GetSide()==side) {
	x[0]=1;
	x[1]=entry->GetX();
	x[2]=entry->GetY();    
	y = fTempArray->GetValue(timeSec,isensor); // get temperature value
	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
	if (IsOK(y)) fitter->AddPoint(x,y,1); // add values to LinearFitter
	i++;
      }
    } else if (type==2) { // in case of IFC also usage of TS values
      if ((entry->GetType()==2) || (entry->GetType()==5)) {
	x[0]=1;
	x[1]=entry->GetZ();
	x[2]=entry->GetPhi();    
	y = fTempArray->GetValue(timeSec,isensor);
	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
	if (IsOK(y)) fitter->AddPoint(x,y,1); 
	i++;
      }
    } else if (type==1){
      if (entry->GetType()==type) {
	x[0]=1;
	x[1]=entry->GetZ();
	x[2]=entry->GetPhi();    
	y = fTempArray->GetValue(timeSec,isensor);
	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
	if (IsOK(y)) fitter->AddPoint(x,y,1);
	i++;	
      }
    } else if (type==4) { // ONLY IFC
      if (entry->GetType()==2) {
	x[0]=1;
	x[1]=entry->GetZ();
	x[2]=entry->GetPhi();    
	y = fTempArray->GetValue(timeSec,isensor);
	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
	if (IsOK(y)) fitter->AddPoint(x,y,1); 
	i++;
      }
    }
  }  
  fitter->Eval();
  //fitter->EvalRobust(0.9); // Evaluates fitter
  

  return fitter; 

  // returns TLinearFitter object where Chi2, Fitparameters and residuals can 
  // be extracted via usual memberfunctions
  // example: fitter->GetParameters(param)
  // In case of type IFC or OFC, the parameters are the gradients in 
  // Z and Y direction (see fitformula)
  // Caution: Parameters are [K/cm] except Y at IFC,OFC ([K/radius]) 
}

//_____________________________________________________________________________

TGraph2D *AliTPCTempMap::GetTempMapsViaSensors(Int_t type, Int_t side, UInt_t timeSec)
{
  // 
  // Creates a TGraph2D object for the desired region of the TPC 
  // (via choosen type and side of TPC temperature sensors) at a given 
  // timeSec (in secounds) after start time
  // type: 0 ... ReadOutChambers (ROC)
  //       1 ... OuterContainmentVessel (OFC)
  //       2 ... InnerContainmentVessel (IFC) + ThermalScreener (TS)
  //       3 ... Within the TPC (DriftVolume) (TPC)
  // side: Can be choosen for type 0 and 3 (otherwise it will be ignored in 
  //       in order to get all temperature sensors of interest)
  //       0 ... A - side
  //       1 ... C - side
  // 

  TGraph2D *graph2D = new TGraph2D();

  Int_t i = 0;
  
  Int_t nsensors = fTempArray->NumSensors();
  for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
    AliTPCSensorTemp *entry = (AliTPCSensorTemp*)fTempArray->GetSensorNum(isensor);

    Double_t x, y, z, r, phi, tempValue;
    x = entry->GetX();
    y = entry->GetY();
    z = entry->GetZ();
    r = entry->GetR();
    phi = entry->GetPhi();
    tempValue = fTempArray->GetValue(timeSec,isensor);
    //    printf("%d type %d: x=%lf y=%lf temp=%lf\n",isensor,entry->GetType(),x,y, tempValue);
    if (type==0 || type==3) { // 'side' information used
      if (entry->GetType()==type && entry->GetSide()==side) {
	graph2D->SetPoint(i,x,y,tempValue);
	i++;
      }
    } else if (type==2) { // in case of IFC also usage of TS values
      if (entry->GetType()==2 || entry->GetType()==5) {
	graph2D->SetPoint(i,z,phi,tempValue);
	i++;
      }
    } else if (type==1){
      if (entry->GetType()==type) {
	graph2D->SetPoint(i,z,phi,tempValue);
	i++;
      }
    }
  }  
  
  if (type==0 || type==3) {
    graph2D->GetXaxis()->SetTitle("X[cm]");
    graph2D->GetYaxis()->SetTitle("Y[cm]");
    if (type==0 && side==0) {
      graph2D->SetTitle("ROC A side");
    } else if (type==0 && side==1) {
      graph2D->SetTitle("ROC C side");
    } else if (type==3 && side==0) {
      graph2D->SetTitle("TPC A side (Inside the TPC)");
    } else if (type==3 && side==1) {
      graph2D->SetTitle("TPC C side (Inside the TPC)");
    }
  } else if (type==1 || type==2) {
    graph2D->GetXaxis()->SetTitle("Z[cm]");
    graph2D->GetYaxis()->SetTitle("Phi[RAD]");
    if (type==1) {
      graph2D->SetTitle("Outer Containment Vessel");
    } else if (type==2) {
      graph2D->SetTitle("Inner Containment Vessel");
    }
  }

  if (!graph2D->GetN()) {
    printf("Returned TGraph2D is empty: check type and side values\n");
  }

  graph2D->GetXaxis()->SetLabelOffset(0.0);
  graph2D->GetYaxis()->SetLabelOffset(0.005);
  graph2D->GetZaxis()->SetLabelOffset(-0.04);
  

  return graph2D; // returns TGgraph2D object
  
}


//_____________________________________________________________________________

TGraph *AliTPCTempMap::MakeGraphGradient(Int_t axis, Int_t side, Int_t nPoints)
{  
  //
  // Make graph from start time to end time of TempGradient in axis direction
  // axis: 0 ... horizontal Temperature Gradient (X)
  //       1 ... vertical Temperature Gradient (Y)
  //       2 ... longitudenal Temperature Gradient (Z) (side is ignored) 
  //             z gradient value based on OFC temperature sensors
  //             Caution!: better z gradient values through difference between 
  //             param[0] A- and param[0] C-side !
  // side for X and Y gradient: 
  //       0 ... Shaft Side (A)
  //       1 ... Muon Side (C)
  //
  
  TVectorD param(3);
  TLinearFitter *fitter = new TLinearFitter(3);

  UInt_t fStartTime = fTempArray->AliTPCSensorTempArray::GetStartTime();
  UInt_t fEndTime = fTempArray->AliTPCSensorTempArray::GetEndTime();
  
  UInt_t stepTime = (fEndTime-fStartTime)/nPoints;

  Double_t *x = new Double_t[nPoints];
  Double_t *y = new Double_t[nPoints];
  for (Int_t ip=0; ip<nPoints; ip++) {
    x[ip] = fStartTime+ip*stepTime;
    if (axis==2) {// Gradient in Z direction (based on OFC tempSensors)
      fitter = GetLinearFitter(1, side, ip*stepTime);
    } else {// Gradient in X or Y direction (based on TPC tempSensors)
      fitter = GetLinearFitter(3, side, ip*stepTime);
    }
    fitter->GetParameters(param);
    // multiplied by 500 since TempGradient is in [K/cm] 
    // (TPC diameter and length ~500cm)
    if (axis==1) { // Y axis
      y[ip] = param[2]*500;
    } else { // X axis
      y[ip] = param[1]*500;
    }
  }

  TGraph *graph = new TGraph(nPoints,x,y);

  fitter->~TLinearFitter(); 
  delete [] x;
  delete [] y;

  graph->GetXaxis()->SetTimeDisplay(1);
  graph->GetXaxis()->SetLabelOffset(0.02);
  graph->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}");

  return graph;
}


//_____________________________________________________________________________
Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, TTimeStamp &stamp)
{
  //
  // absolute time stamp used
  // see also Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, UInt_t timeSec) for details
  //

  Int_t timeSec = stamp.GetSec()-fTempArray->GetStartTime().GetSec();
  return GetTemperature(x, y, z, timeSec);
}

//_____________________________________________________________________________

Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, UInt_t timeSec)
{  
  //
  // Returns estimated Temperature at given position (x,y,z[cm]) at given time 
  // (timeSec) after starttime
  // Method: so far just a linear interpolation between Linar fits of 
  //         the TPC temperature sensors
  //         FIXME: 'Educated Fit' through FiniteElement Simulation results!
  // FIXXME: Return 0? if x,y,z out of range
  //
  
  TVectorD paramA(3), paramC(3);
  TLinearFitter *fitterA = 0;
  TLinearFitter *fitterC = 0;

  fitterA = GetLinearFitter(3, 0, timeSec);
  fitterA->GetParameters(paramA);
  fitterC = GetLinearFitter(3, 1, timeSec);
  fitterC->GetParameters(paramC);

  Double_t fvalA = paramA[0]+paramA[1]*x+paramA[2]*y;
  Double_t fvalC = paramC[0]+paramC[1]*x+paramC[2]*y;

  Double_t k = (fvalA-fvalC)/(2*247);
  Double_t tempValue = fvalC+(fvalA-fvalC)/2+k*z;

  delete fitterA;
  delete fitterC;

  return tempValue;

}


Bool_t  AliTPCTempMap::IsOK(Float_t value){
  //
  // checks if value is within a certain range
  //
  const Float_t kMinT=15;
  const Float_t kMaxT=25;
  return (value>kMinT && value<kMaxT);
}
Commit	Line	Data
1209231c	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
	17	///////////////////////////////////////////////////////////////////////////////
	18	// //
	19	// TPC calibration class for temperature maps and tendencies //
	20	// (based on TPC Temperature Sensors and FiniteElement Simulation) //
	21	// //
	22	// Authors: Stefan Rossegger, Haavard Helstrup //
	23	// //
7ee86790	24	// Note: Obvioulsy some changes by Marian, but when ??? //
7ee86790	25	// //
1209231c	26	///////////////////////////////////////////////////////////////////////////////
	27
	28	#include "AliTPCSensorTempArray.h"
	29	#include "TLinearFitter.h"
	30	#include "TString.h"
	31	#include "TGraph2D.h"
f59cd9d0	32	#include "TTimeStamp.h"
1209231c	33
	34	#include "AliTPCTempMap.h"
	35
	36
	37	ClassImp(AliTPCTempMap)
	38
	39	const char kStringFEsimulation[] = "FEsimulation.txt";
	40
	41	//_____________________________________________________________________________
	42	AliTPCTempMap::AliTPCTempMap(AliTPCSensorTempArray *sensorDCS):
	43	TNamed(),
f59cd9d0	44	fTempArray(0),
1209231c	45	fStringFEsimulation(kStringFEsimulation)
	46	{
	47	//
	48	// AliTPCTempMap default constructor
	49	//
	50
f59cd9d0	51	fTempArray = sensorDCS;
1209231c	52
	53	}
	54
	55	//_____________________________________________________________________________
	56	AliTPCTempMap::AliTPCTempMap(const AliTPCTempMap &c):
	57	TNamed(c),
f59cd9d0	58	fTempArray(c.fTempArray),
1209231c	59	fStringFEsimulation(c.fStringFEsimulation)
	60	{
	61	//
	62	// AliTPCTempMap copy constructor
	63	//
	64
	65	}
	66
	67	//_____________________________________________________________________________
	68	AliTPCTempMap::~AliTPCTempMap()
	69	{
	70	//
	71	// AliTPCTempMap destructor
	72	//
	73
	74	}
	75
	76	//_____________________________________________________________________________
	77	AliTPCTempMap &AliTPCTempMap::operator=(const AliTPCTempMap &c)
	78	{
	79	//
	80	// Assignment operator
	81	//
	82
	83	if (this != &c) ((AliTPCTempMap &) c).Copy(*this);
	84	return *this;
	85
	86	}
	87
	88	//_____________________________________________________________________________
	89	void AliTPCTempMap::Copy(TObject &c) const
	90	{
	91	//
	92	// Copy function
	93	//
	94
	95	TObject::Copy(c);
	96
	97	}
	98
	99	//_____________________________________________________________________________
	100
	101	Double_t AliTPCTempMap::GetTempGradientY(UInt_t timeSec, Int_t side){
	102	//
	103	// Extract Linear Vertical Temperature Gradient [K/cm] within the TPC on
	104	// Shaft Side(A): 0
	105	// Muon Side(C): 1
	106	// Values based on TemperatureSensors within the TPC ( type: 3 (TPC) )
	107	//
	108	// FIXME: Also return residual-distribution, covariance Matrix
	109	// or simply chi2 for validity check?
	110	// -> better use GetLinearFitter - function in this case!
	111
b479e253	112	TLinearFitter *fitter = new TLinearFitter(3,"x0++x1++x2");
1209231c	113	TVectorD param(3);
	114	Int_t i = 0;
	115
f59cd9d0	116	Int_t nsensors = fTempArray->NumSensors();
1209231c	117	for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
f59cd9d0	118	AliTPCSensorTemp entry = (AliTPCSensorTemp)fTempArray->GetSensorNum(isensor);
1209231c	119
	120	if (entry->GetType()==3 && entry->GetSide()==side) { // take SensorType:TPC
	121	Double_t x[3];
	122	x[0]=1;
	123	x[1]=entry->GetX();
	124	x[2]=entry->GetY();
f59cd9d0	125	Double_t y = fTempArray->GetValue(timeSec,isensor); // get temperature value
f4fe7830	126	if (IsOK(y)) fitter->AddPoint(x,y,1); // add values to LinearFitter
1209231c	127	i++;
	128	}
	129
	130	}
b479e253	131	fitter->Eval();
	132	fitter->GetParameters(param);
	133
	134	fitter->~TLinearFitter();
1209231c	135
	136	return param[2]; // return vertical (Y) tempGradient in [K/cm]
	137
	138	}
	139
f1ea1647	140	//_____________________________________________________________________________
f59cd9d0	141	TLinearFitter *AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, TTimeStamp &stamp)
	142	{
	143	//
	144	// absolute time stamp used
	145	// see AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, UInt_t timeSec) for details
	146	//
148518a2	147	Int_t timeSec = stamp.GetSec()-fTempArray->GetStartTime().GetSec();
f59cd9d0	148	return GetLinearFitter(type,side,timeSec);
	149	}
	150
1209231c	151	//_____________________________________________________________________________
1209231c	152	TLinearFitter *AliTPCTempMap::GetLinearFitter(Int_t type, Int_t side, UInt_t timeSec)
	153	{
	154	//
	155	// Creates a TlinearFitter object for the desired region of the TPC
	156	// (via choosen type and side of TPC temperature sensors) at a given
	157	// timeSec (in secounds) after start time
	158	// type: 0 ... ReadOutChambers (ROC)
	159	// 1 ... OuterContainmentVessel (OFC)
	160	// 2 ... InnerContainmentVessel (IFC) + ThermalScreener (TS)
	161	// 3 ... Within the TPC (DriftVolume) (TPC)
d0bd4fcc	162	// 4 ... Only InnerContainmentVessel (IFC)
1209231c	163	// side: Can be choosen for type 0 and 3 (otherwise it will be ignored in
	164	// in order to get all temperature sensors of interest)
	165	// 0 ... Shaft Side (A)
	166	// 1 ... Muon Side (C)
	167	//
	168
	169	TLinearFitter *fitter = new TLinearFitter(3);
75b27bdb	170	Double_t x[3]={0};
1209231c	171	Double_t y = 0;
f4fe7830	172	const Float_t kMaxDelta=0.5;
f59cd9d0	173
d0bd4fcc	174	if (type == 1 \|\| type == 2 \|\| type == 4) {
1209231c	175	fitter->SetFormula("x0++x1++TMath::Sin(x2)"); // returns Z,Y gradient
	176	} else {
	177	fitter->SetFormula("x0++x1++x2"); // returns X,Y gradient
	178	}
	179
	180	Int_t i = 0;
f59cd9d0	181	Int_t nsensors = fTempArray->NumSensors();
	182
	183	Float_t temps[1000];
	184	for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
	185	AliTPCSensorTemp entry = (AliTPCSensorTemp)fTempArray->GetSensorNum(isensor);
	186	if (entry->GetType()==type && entry->GetSide()==side){
	187	Float_t temperature= fTempArray->GetValue(timeSec,isensor); // get temperature value
f4fe7830	188	if (IsOK(temperature)) {temps[i]=temperature; i++;}
f59cd9d0	189	}
	190	}
	191	Float_t medianTemp = TMath::Median(i, temps);
	192	if (i<3) return 0;
	193	Float_t rmsTemp = TMath::RMS(i, temps);
	194
	195	i=0;
	196
1209231c	197	for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
f59cd9d0	198	AliTPCSensorTemp entry = (AliTPCSensorTemp)fTempArray->GetSensorNum(isensor);
1209231c	199
	200	if (type==0 \|\| type==3) { // 'side' information used
	201	if (entry->GetType()==type && entry->GetSide()==side) {
	202	x[0]=1;
	203	x[1]=entry->GetX();
	204	x[2]=entry->GetY();
f59cd9d0	205	y = fTempArray->GetValue(timeSec,isensor); // get temperature value
f59cd9d0	206	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
f4fe7830	207	if (IsOK(y)) fitter->AddPoint(x,y,1); // add values to LinearFitter
1209231c	208	i++;
	209	}
	210	} else if (type==2) { // in case of IFC also usage of TS values
	211	if ((entry->GetType()==2) \|\| (entry->GetType()==5)) {
	212	x[0]=1;
	213	x[1]=entry->GetZ();
	214	x[2]=entry->GetPhi();
f59cd9d0	215	y = fTempArray->GetValue(timeSec,isensor);
f59cd9d0	216	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
f4fe7830	217	if (IsOK(y)) fitter->AddPoint(x,y,1);
1209231c	218	i++;
	219	}
	220	} else if (type==1){
	221	if (entry->GetType()==type) {
	222	x[0]=1;
	223	x[1]=entry->GetZ();
	224	x[2]=entry->GetPhi();
f59cd9d0	225	y = fTempArray->GetValue(timeSec,isensor);
f59cd9d0	226	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
f4fe7830	227	if (IsOK(y)) fitter->AddPoint(x,y,1);
1209231c	228	i++;
1209231c	229	}
d0bd4fcc	230	} else if (type==4) { // ONLY IFC
	231	if (entry->GetType()==2) {
	232	x[0]=1;
	233	x[1]=entry->GetZ();
	234	x[2]=entry->GetPhi();
f59cd9d0	235	y = fTempArray->GetValue(timeSec,isensor);
f59cd9d0	236	if (TMath::Abs(y-medianTemp)>kMaxDelta+4.*rmsTemp) continue;
f4fe7830	237	if (IsOK(y)) fitter->AddPoint(x,y,1);
d0bd4fcc	238	i++;
d0bd4fcc	239	}
1209231c	240	}
1209231c	241	}
f59cd9d0	242	fitter->Eval();
f59cd9d0	243	//fitter->EvalRobust(0.9); // Evaluates fitter
1209231c	244
1209231c	245
	246	return fitter;
	247
	248	// returns TLinearFitter object where Chi2, Fitparameters and residuals can
	249	// be extracted via usual memberfunctions
b479e253	250	// example: fitter->GetParameters(param)
1209231c	251	// In case of type IFC or OFC, the parameters are the gradients in
	252	// Z and Y direction (see fitformula)
	253	// Caution: Parameters are [K/cm] except Y at IFC,OFC ([K/radius])
	254	}
	255
	256	//_____________________________________________________________________________
	257
	258	TGraph2D *AliTPCTempMap::GetTempMapsViaSensors(Int_t type, Int_t side, UInt_t timeSec)
	259	{
	260	//
	261	// Creates a TGraph2D object for the desired region of the TPC
	262	// (via choosen type and side of TPC temperature sensors) at a given
	263	// timeSec (in secounds) after start time
	264	// type: 0 ... ReadOutChambers (ROC)
	265	// 1 ... OuterContainmentVessel (OFC)
	266	// 2 ... InnerContainmentVessel (IFC) + ThermalScreener (TS)
	267	// 3 ... Within the TPC (DriftVolume) (TPC)
	268	// side: Can be choosen for type 0 and 3 (otherwise it will be ignored in
	269	// in order to get all temperature sensors of interest)
55f06b51	270	// 0 ... A - side
55f06b51	271	// 1 ... C - side
1209231c	272	//
	273
	274	TGraph2D *graph2D = new TGraph2D();
	275
	276	Int_t i = 0;
	277
f59cd9d0	278	Int_t nsensors = fTempArray->NumSensors();
1209231c	279	for (Int_t isensor=0; isensor<nsensors; isensor++) { // loop over all sensors
f59cd9d0	280	AliTPCSensorTemp entry = (AliTPCSensorTemp)fTempArray->GetSensorNum(isensor);
1209231c	281
	282	Double_t x, y, z, r, phi, tempValue;
	283	x = entry->GetX();
	284	y = entry->GetY();
	285	z = entry->GetZ();
	286	r = entry->GetR();
	287	phi = entry->GetPhi();
f59cd9d0	288	tempValue = fTempArray->GetValue(timeSec,isensor);
55f06b51	289	// printf("%d type %d: x=%lf y=%lf temp=%lf\n",isensor,entry->GetType(),x,y, tempValue);
1209231c	290	if (type==0 \|\| type==3) { // 'side' information used
	291	if (entry->GetType()==type && entry->GetSide()==side) {
	292	graph2D->SetPoint(i,x,y,tempValue);
	293	i++;
	294	}
	295	} else if (type==2) { // in case of IFC also usage of TS values
	296	if (entry->GetType()==2 \|\| entry->GetType()==5) {
	297	graph2D->SetPoint(i,z,phi,tempValue);
	298	i++;
	299	}
	300	} else if (type==1){
	301	if (entry->GetType()==type) {
	302	graph2D->SetPoint(i,z,phi,tempValue);
	303	i++;
	304	}
	305	}
	306	}
	307
	308	if (type==0 \|\| type==3) {
	309	graph2D->GetXaxis()->SetTitle("X[cm]");
	310	graph2D->GetYaxis()->SetTitle("Y[cm]");
	311	if (type==0 && side==0) {
55f06b51	312	graph2D->SetTitle("ROC A side");
1209231c	313	} else if (type==0 && side==1) {
55f06b51	314	graph2D->SetTitle("ROC C side");
1209231c	315	} else if (type==3 && side==0) {
55f06b51	316	graph2D->SetTitle("TPC A side (Inside the TPC)");
1209231c	317	} else if (type==3 && side==1) {
55f06b51	318	graph2D->SetTitle("TPC C side (Inside the TPC)");
1209231c	319	}
	320	} else if (type==1 \|\| type==2) {
	321	graph2D->GetXaxis()->SetTitle("Z[cm]");
	322	graph2D->GetYaxis()->SetTitle("Phi[RAD]");
	323	if (type==1) {
	324	graph2D->SetTitle("Outer Containment Vessel");
	325	} else if (type==2) {
55f06b51	326	graph2D->SetTitle("Inner Containment Vessel");
1209231c	327	}
	328	}
	329
	330	if (!graph2D->GetN()) {
	331	printf("Returned TGraph2D is empty: check type and side values\n");
	332	}
	333
	334	graph2D->GetXaxis()->SetLabelOffset(0.0);
	335	graph2D->GetYaxis()->SetLabelOffset(0.005);
	336	graph2D->GetZaxis()->SetLabelOffset(-0.04);
	337
	338
	339	return graph2D; // returns TGgraph2D object
	340
	341	}
	342
	343
	344	//_____________________________________________________________________________
	345
	346	TGraph *AliTPCTempMap::MakeGraphGradient(Int_t axis, Int_t side, Int_t nPoints)
	347	{
	348	//
	349	// Make graph from start time to end time of TempGradient in axis direction
	350	// axis: 0 ... horizontal Temperature Gradient (X)
	351	// 1 ... vertical Temperature Gradient (Y)
	352	// 2 ... longitudenal Temperature Gradient (Z) (side is ignored)
	353	// z gradient value based on OFC temperature sensors
	354	// Caution!: better z gradient values through difference between
	355	// param[0] A- and param[0] C-side !
	356	// side for X and Y gradient:
	357	// 0 ... Shaft Side (A)
	358	// 1 ... Muon Side (C)
	359	//
	360
	361	TVectorD param(3);
	362	TLinearFitter *fitter = new TLinearFitter(3);
	363
f59cd9d0	364	UInt_t fStartTime = fTempArray->AliTPCSensorTempArray::GetStartTime();
f59cd9d0	365	UInt_t fEndTime = fTempArray->AliTPCSensorTempArray::GetEndTime();
1209231c	366
	367	UInt_t stepTime = (fEndTime-fStartTime)/nPoints;
	368
	369	Double_t *x = new Double_t[nPoints];
	370	Double_t *y = new Double_t[nPoints];
	371	for (Int_t ip=0; ip<nPoints; ip++) {
	372	x[ip] = fStartTime+ip*stepTime;
	373	if (axis==2) {// Gradient in Z direction (based on OFC tempSensors)
	374	fitter = GetLinearFitter(1, side, ip*stepTime);
	375	} else {// Gradient in X or Y direction (based on TPC tempSensors)
	376	fitter = GetLinearFitter(3, side, ip*stepTime);
	377	}
	378	fitter->GetParameters(param);
	379	// multiplied by 500 since TempGradient is in [K/cm]
	380	// (TPC diameter and length ~500cm)
	381	if (axis==1) { // Y axis
	382	y[ip] = param[2]*500;
	383	} else { // X axis
	384	y[ip] = param[1]*500;
	385	}
	386	}
	387
	388	TGraph *graph = new TGraph(nPoints,x,y);
	389
	390	fitter->~TLinearFitter();
	391	delete [] x;
	392	delete [] y;
	393
	394	graph->GetXaxis()->SetTimeDisplay(1);
	395	graph->GetXaxis()->SetLabelOffset(0.02);
	396	graph->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}");
	397
	398	return graph;
	399	}
	400
f1ea1647	401
	402	//_____________________________________________________________________________
	403	Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, TTimeStamp &stamp)
	404	{
	405	//
	406	// absolute time stamp used
	407	// see also Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, UInt_t timeSec) for details
	408	//
	409
	410	Int_t timeSec = stamp.GetSec()-fTempArray->GetStartTime().GetSec();
	411	return GetTemperature(x, y, z, timeSec);
	412	}
	413
1209231c	414	//_____________________________________________________________________________
	415
	416	Double_t AliTPCTempMap::GetTemperature(Double_t x, Double_t y, Double_t z, UInt_t timeSec)
	417	{
	418	//
f1ea1647	419	// Returns estimated Temperature at given position (x,y,z[cm]) at given time
1209231c	420	// (timeSec) after starttime
	421	// Method: so far just a linear interpolation between Linar fits of
	422	// the TPC temperature sensors
	423	// FIXME: 'Educated Fit' through FiniteElement Simulation results!
	424	// FIXXME: Return 0? if x,y,z out of range
	425	//
	426
	427	TVectorD paramA(3), paramC(3);
75b27bdb	428	TLinearFitter *fitterA = 0;
75b27bdb	429	TLinearFitter *fitterC = 0;
1209231c	430
	431	fitterA = GetLinearFitter(3, 0, timeSec);
	432	fitterA->GetParameters(paramA);
	433	fitterC = GetLinearFitter(3, 1, timeSec);
	434	fitterC->GetParameters(paramC);
	435
	436	Double_t fvalA = paramA[0]+paramA[1]x+paramA[2]y;
	437	Double_t fvalC = paramC[0]+paramC[1]x+paramC[2]y;
	438
	439	Double_t k = (fvalA-fvalC)/(2*247);
	440	Double_t tempValue = fvalC+(fvalA-fvalC)/2+k*z;
	441
75b27bdb	442	delete fitterA;
75b27bdb	443	delete fitterC;
1209231c	444
1209231c	445	return tempValue;
f1ea1647	446
1209231c	447	}
1209231c	448
f4fe7830	449
	450	Bool_t AliTPCTempMap::IsOK(Float_t value){
	451	//
7ee86790	452	// checks if value is within a certain range
f4fe7830	453	//
	454	const Float_t kMinT=15;
	455	const Float_t kMaxT=25;
	456	return (value>kMinT && value<kMaxT);
	457	}