PRunAsymmetry.cpp

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/***************************************************************************

  PRunAsymmetry.cpp

  Author: Andreas Suter
  e-mail: andreas.suter@psi.ch

***************************************************************************/

/***************************************************************************
 *   Copyright (C) 2007-2023 by Andreas Suter                              *
 *   andreas.suter@psi.ch                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_GOMP
#include <omp.h>
#endif

#include <stdio.h>

#include <iostream>

#include <TString.h>
#include <TObjArray.h>
#include <TObjString.h>

#include "PMusr.h"
#include "PRunAsymmetry.h"

//--------------------------------------------------------------------------
// Constructor
//--------------------------------------------------------------------------
PRunAsymmetry::PRunAsymmetry() : PRunBase()
{
  fNoOfFitBins  = 0;
  fPacking = -1;
  fTheoAsData = false;

  // the 2 following variables are need in case fit range is given in bins, and since
  // the fit range can be changed in the command block, these variables need to be accessible
  fGoodBins[0] = -1;
  fGoodBins[1] = -1;

  fStartTimeBin = -1;
  fEndTimeBin   = -1;
}

//--------------------------------------------------------------------------
// Constructor
//--------------------------------------------------------------------------
PRunAsymmetry::PRunAsymmetry(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag, Bool_t theoAsData) :
  PRunBase(msrInfo, rawData, runNo, tag), fTheoAsData(theoAsData)
{
  // the 2 following variables are need in case fit range is given in bins, and since
  // the fit range can be changed in the command block, these variables need to be accessible
  fGoodBins[0] = -1;
  fGoodBins[1] = -1;

  fStartTimeBin = -1;
  fEndTimeBin   = -1;

  fPacking = fRunInfo->GetPacking();
  if (fPacking == -1) { // i.e. packing is NOT given in the RUN-block, it must be given in the GLOBAL-block
    fPacking = fMsrInfo->GetMsrGlobal()->GetPacking();
  }
  if (fPacking == -1) { // this should NOT happen, somethin is severely wrong
    std::cerr << std::endl << ">> PRunAsymmetry::PRunAsymmetry(): **SEVERE ERROR**: Couldn't find any packing information!";
    std::cerr << std::endl << ">> This is very bad :-(, will quit ...";
    std::cerr << std::endl;
    fValid = false;
    return;
  }

  // check if alpha and/or beta is fixed --------------------

  PMsrParamList *param = msrInfo->GetMsrParamList();

  // check if alpha is given
  if (fRunInfo->GetAlphaParamNo() == -1) { // no alpha given
    std::cerr << std::endl << ">> PRunAsymmetry::PRunAsymmetry(): **ERROR** no alpha parameter given! This is needed for an asymmetry fit!";
    std::cerr << std::endl;
    fValid = false;
    return;
  }
  // check if alpha parameter is within proper bounds
  if (fRunInfo->GetAlphaParamNo() >= MSR_PARAM_FUN_OFFSET) { // alpha seems to be a function
    if ((fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET < 0) ||
        (fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET > msrInfo->GetNoOfFuncs())) {
      std::cerr << std::endl << ">> PRunAsymmetry::PRunAsymmetry(): **ERROR** alpha parameter is a function with no = " << fRunInfo->GetAlphaParamNo();
      std::cerr << std::endl << ">> This is out of bound, since there are only " << msrInfo->GetNoOfFuncs() << " functions.";
      std::cerr << std::endl;
      fValid = false;
      return;
    }
  } else if ((fRunInfo->GetAlphaParamNo() < 0) || (fRunInfo->GetAlphaParamNo() > static_cast<Int_t>(param->size()))) {
    std::cerr << std::endl << ">> PRunAsymmetry::PRunAsymmetry(): **ERROR** alpha parameter no = " << fRunInfo->GetAlphaParamNo();
    std::cerr << std::endl << ">> This is out of bound, since there are only " << param->size() << " parameters.";
    std::cerr << std::endl;
    fValid = false;
    return;
  }
  // check if alpha is fixed
  Bool_t alphaFixedToOne = false;
  if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is parameter
    if (((*param)[fRunInfo->GetAlphaParamNo()-1].fStep == 0.0) &&
        ((*param)[fRunInfo->GetAlphaParamNo()-1].fValue == 1.0))
      alphaFixedToOne = true;
  }
  // check if beta is given
  Bool_t betaFixedToOne = false;
  if (fRunInfo->GetBetaParamNo() == -1) { // no beta given hence assuming beta == 1
    betaFixedToOne = true;
  } else if ((fRunInfo->GetBetaParamNo() < 0) || (fRunInfo->GetBetaParamNo() > static_cast<Int_t>(param->size()))) { // check if beta parameter is within proper bounds
    std::cerr << std::endl << ">> PRunAsymmetry::PRunAsymmetry(): **ERROR** beta parameter no = " << fRunInfo->GetBetaParamNo();
    std::cerr << std::endl << ">> This is out of bound, since there are only " << param->size() << " parameters.";
    std::cerr << std::endl;
    fValid = false;
    return;
  } else { // check if beta is fixed
    if (((*param)[fRunInfo->GetBetaParamNo()-1].fStep == 0.0) &&
        ((*param)[fRunInfo->GetBetaParamNo()-1].fValue == 1.0))
      betaFixedToOne = true;
  }

  // set fAlphaBetaTag
  if (alphaFixedToOne && betaFixedToOne)       // alpha == 1, beta == 1
    fAlphaBetaTag = 1;
  else if (!alphaFixedToOne && betaFixedToOne) // alpha != 1, beta == 1
    fAlphaBetaTag = 2;
  else if (alphaFixedToOne && !betaFixedToOne) // alpha == 1, beta != 1
    fAlphaBetaTag = 3;
  else
    fAlphaBetaTag = 4;

  // calculate fData
  if (!PrepareData())
    fValid = false;
}

//--------------------------------------------------------------------------
// Destructor
//--------------------------------------------------------------------------
PRunAsymmetry::~PRunAsymmetry()
{
  fForward.clear();
  fForwardErr.clear();
  fBackward.clear();
  fBackwardErr.clear();
}

//--------------------------------------------------------------------------
// CalcChiSquare (public)
//--------------------------------------------------------------------------
Double_t PRunAsymmetry::CalcChiSquare(const std::vector<Double_t>& par)
{
  Double_t chisq = 0.0;
  Double_t diff = 0.0;
  Double_t asymFcnValue = 0.0;
  Double_t a, b, f;

  // calculate functions
  for (Int_t i=0; i<fMsrInfo->GetNoOfFuncs(); i++) {
    fFuncValues[i] = fMsrInfo->EvalFunc(fMsrInfo->GetFuncNo(i), *fRunInfo->GetMap(), par, fMetaData);
  }

  // calculate chi square
  Double_t time(1.0);
  Int_t i;

  // determine alpha/beta
  switch (fAlphaBetaTag) {
    case 1: // alpha == 1, beta == 1
      a = 1.0;
      b = 1.0;
      break;
    case 2: // alpha != 1, beta == 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        a = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        a = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      b = 1.0;
      break;
    case 3: // alpha == 1, beta != 1
      a = 1.0;
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        b = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        b = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    case 4: // alpha != 1, beta != 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        a = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        a = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        b = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        b = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    default:
      a = 1.0;
      b = 1.0;
      break;
  }

  // Calculate the theory function once to ensure one function evaluation for the current set of parameters.
  // This is needed for the LF and user functions where some non-thread-save calculations only need to be calculated once
  // for a given set of parameters---which should be done outside of the parallelized loop.
  // For all other functions it means a tiny and acceptable overhead.
  asymFcnValue = fTheory->Func(time, par, fFuncValues);

  #ifdef HAVE_GOMP
  Int_t chunk = (fEndTimeBin - fStartTimeBin)/omp_get_num_procs();
  if (chunk < 10)
    chunk = 10;
  #pragma omp parallel for default(shared) private(i,time,diff,asymFcnValue,f) schedule(dynamic,chunk) reduction(+:chisq)
  #endif
  for (i=fStartTimeBin; i<fEndTimeBin; ++i) {
    time = fData.GetDataTimeStart() + static_cast<Double_t>(i)*fData.GetDataTimeStep();
    f = fTheory->Func(time, par, fFuncValues);
    asymFcnValue = (f*(a*b+1.0)-(a-1.0))/((a+1.0)-f*(a*b-1.0));
    diff = fData.GetValue()->at(i) - asymFcnValue;
    chisq += diff*diff / (fData.GetError()->at(i)*fData.GetError()->at(i));
  }

  return chisq;
}

//--------------------------------------------------------------------------
// CalcChiSquareExpected (public)
//--------------------------------------------------------------------------
Double_t PRunAsymmetry::CalcChiSquareExpected(const std::vector<Double_t>& par)
{
  return 0.0;
}

//--------------------------------------------------------------------------
// CalcMaxLikelihood (public)
//--------------------------------------------------------------------------
Double_t PRunAsymmetry::CalcMaxLikelihood(const std::vector<Double_t>& par)
{
  std::cout << std::endl << "PRunAsymmetry::CalcMaxLikelihood(): not implemented yet ..." << std::endl;

  return 1.0;
}

//--------------------------------------------------------------------------
// GetNoOfFitBins (public)
//--------------------------------------------------------------------------
UInt_t PRunAsymmetry::GetNoOfFitBins()
{
  CalcNoOfFitBins();

  return fNoOfFitBins;
}

//--------------------------------------------------------------------------
// SetFitRangeBin (public)
//--------------------------------------------------------------------------
void PRunAsymmetry::SetFitRangeBin(const TString fitRange)
{
  TObjArray *tok = nullptr;
  TObjString *ostr = nullptr;
  TString str;
  Ssiz_t idx = -1;
  Int_t offset = 0;

  tok = fitRange.Tokenize(" \t");

  if (tok->GetEntries() == 3) { // structure FIT_RANGE fgb+n0 lgb-n1
    // handle fgb+n0 entry
    ostr = dynamic_cast<TObjString*>(tok->At(1));
    str = ostr->GetString();
    // check if there is an offset present
    idx = str.First("+");
    if (idx != -1) { // offset present
      str.Remove(0, idx+1);
      if (str.IsFloat()) // if str is a valid number, convert is to an integer
        offset = str.Atoi();
    }
    fFitStartTime = (fGoodBins[0] + offset - fT0s[0]) * fTimeResolution;

    // handle lgb-n1 entry
    ostr = dynamic_cast<TObjString*>(tok->At(2));
    str = ostr->GetString();
    // check if there is an offset present
    idx = str.First("-");
    if (idx != -1) { // offset present
      str.Remove(0, idx+1);
      if (str.IsFloat()) // if str is a valid number, convert is to an integer
        offset = str.Atoi();
    }
    fFitEndTime = (fGoodBins[1] - offset - fT0s[0]) * fTimeResolution;
  } else if ((tok->GetEntries() > 3) && (tok->GetEntries() % 2 == 1)) { // structure FIT_RANGE fgb[+n00] lgb[-n01] [fgb[+n10] lgb[-n11] ... fgb[+nN0] lgb[-nN1]]
    Int_t pos = 2*(fRunNo+1)-1;

    if (pos + 1 >= tok->GetEntries()) {
      std::cerr << std::endl << ">> PRunAsymmetry::SetFitRangeBin(): **ERROR** invalid FIT_RANGE command found: '" << fitRange << "'";
      std::cerr << std::endl << ">> will ignore it. Sorry ..." << std::endl;
    } else {
      // handle fgb+n0 entry
      ostr = static_cast<TObjString*>(tok->At(pos));
      str = ostr->GetString();
      // check if there is an offset present
      idx = str.First("+");
      if (idx != -1) { // offset present
        str.Remove(0, idx+1);
        if (str.IsFloat()) // if str is a valid number, convert is to an integer
          offset = str.Atoi();
      }
      fFitStartTime = (fGoodBins[0] + offset - fT0s[0]) * fTimeResolution;

      // handle lgb-n1 entry
      ostr = static_cast<TObjString*>(tok->At(pos+1));
      str = ostr->GetString();
      // check if there is an offset present
      idx = str.First("-");
      if (idx != -1) { // offset present
        str.Remove(0, idx+1);
        if (str.IsFloat()) // if str is a valid number, convert is to an integer
          offset = str.Atoi();
      }
      fFitEndTime = (fGoodBins[1] - offset - fT0s[0]) * fTimeResolution;
    }
  } else { // error
    std::cerr << std::endl << ">> PRunAsymmetry::SetFitRangeBin(): **ERROR** invalid FIT_RANGE command found: '" << fitRange << "'";
    std::cerr << std::endl << ">> will ignore it. Sorry ..." << std::endl;
  }

  // clean up
  if (tok) {
    delete tok;
  }
}

//--------------------------------------------------------------------------
// CalcNoOfFitBins (public)
//--------------------------------------------------------------------------
void PRunAsymmetry::CalcNoOfFitBins()
{
  // In order not having to loop over all bins and to stay consistent with the chisq method, calculate the start and end bins explicitly
  fStartTimeBin = static_cast<Int_t>(ceil((fFitStartTime - fData.GetDataTimeStart())/fData.GetDataTimeStep()));
  if (fStartTimeBin < 0)
    fStartTimeBin = 0;
  fEndTimeBin = static_cast<Int_t>(floor((fFitEndTime - fData.GetDataTimeStart())/fData.GetDataTimeStep())) + 1;
  if (fEndTimeBin > static_cast<Int_t>(fData.GetValue()->size()))
    fEndTimeBin = fData.GetValue()->size();

  if (fEndTimeBin > fStartTimeBin)
    fNoOfFitBins = static_cast<UInt_t>(fEndTimeBin - fStartTimeBin);
  else
    fNoOfFitBins = 0;
}

//--------------------------------------------------------------------------
// CalcTheory (protected)
//--------------------------------------------------------------------------
void PRunAsymmetry::CalcTheory()
{
  // feed the parameter vector
  std::vector<Double_t> par;
  PMsrParamList *paramList = fMsrInfo->GetMsrParamList();
  for (UInt_t i=0; i<paramList->size(); i++)
    par.push_back((*paramList)[i].fValue);

  // calculate functions
  for (Int_t i=0; i<fMsrInfo->GetNoOfFuncs(); i++) {
    fFuncValues[i] = fMsrInfo->EvalFunc(fMsrInfo->GetFuncNo(i), *fRunInfo->GetMap(), par, fMetaData);
  }

  // calculate asymmetry
  Double_t asymFcnValue = 0.0;
  Double_t a, b, f;
  Double_t time;
  for (UInt_t i=0; i<fData.GetValue()->size(); i++) {
    time = fData.GetDataTimeStart() + static_cast<Double_t>(i)*fData.GetDataTimeStep();
    switch (fAlphaBetaTag) {
      case 1: // alpha == 1, beta == 1
        asymFcnValue = fTheory->Func(time, par, fFuncValues);
        break;
      case 2: // alpha != 1, beta == 1
        if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
          a = par[fRunInfo->GetAlphaParamNo()-1];
        } else { // alpha is function
          // get function number
          UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
          // evaluate function
          a = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
        }
        f = fTheory->Func(time, par, fFuncValues);
        asymFcnValue = (f*(a+1.0)-(a-1.0))/((a+1.0)-f*(a-1.0));
        break;
      case 3: // alpha == 1, beta != 1
        if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
          b = par[fRunInfo->GetBetaParamNo()-1];
        } else { // beta is a function
          // get function number
          UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
          // evaluate function
          b = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
        }
        f = fTheory->Func(time, par, fFuncValues);
        asymFcnValue = f*(b+1.0)/(2.0-f*(b-1.0));
        break;
      case 4: // alpha != 1, beta != 1
        if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
          a = par[fRunInfo->GetAlphaParamNo()-1];
        } else { // alpha is function
          // get function number
          UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
          // evaluate function
          a = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
        }
        if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
          b = par[fRunInfo->GetBetaParamNo()-1];
        } else { // beta is a function
          // get function number
          UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
          // evaluate function
          b = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
        }
        f = fTheory->Func(time, par, fFuncValues);
        asymFcnValue = (f*(a*b+1.0)-(a-1.0))/((a+1.0)-f*(a*b-1.0));
        break;
      default:
        asymFcnValue = 0.0;
        break;
    }
    fData.AppendTheoryValue(asymFcnValue);
  }

  // clean up
  par.clear();
}

//--------------------------------------------------------------------------
// PrepareData (protected)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::PrepareData()
{
  if (!fValid)
    return false;

  // keep the Global block info
  PMsrGlobalBlock *globalBlock = fMsrInfo->GetMsrGlobal();

  // get forward/backward histo from PRunDataHandler object ------------------------
  // get the correct run
  PRawRunData *runData = fRawData->GetRunData(*(fRunInfo->GetRunName()));
  if (!runData) { // run not found
    std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **ERROR** Couldn't get run " << fRunInfo->GetRunName()->Data() << "!";
    std::cerr << std::endl;
    return false;
  }

  // keep the field from the meta-data from the data-file
  fMetaData.fField = runData->GetField();

  // keep the energy from the meta-data from the data-file
  fMetaData.fEnergy = runData->GetEnergy();

  // keep the temperature(s) from the meta-data from the data-file
  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
    fMetaData.fTemp.push_back(runData->GetTemperature(i));

  // collect histogram numbers
  PUIntVector forwardHistoNo;
  PUIntVector backwardHistoNo;
  for (UInt_t i=0; i<fRunInfo->GetForwardHistoNoSize(); i++) {
    forwardHistoNo.push_back(fRunInfo->GetForwardHistoNo(i));

    if (!runData->IsPresent(forwardHistoNo[i])) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **PANIC ERROR**:";
      std::cerr << std::endl << ">> forwardHistoNo found = " << forwardHistoNo[i] << ", which is NOT present in the data file!?!?";
      std::cerr << std::endl << ">> Will quit :-(";
      std::cerr << std::endl;
      // clean up
      forwardHistoNo.clear();
      backwardHistoNo.clear();
      return false;
    }
  }
  for (UInt_t i=0; i<fRunInfo->GetBackwardHistoNoSize(); i++) {
    backwardHistoNo.push_back(fRunInfo->GetBackwardHistoNo(i));

    if (!runData->IsPresent(backwardHistoNo[i])) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **PANIC ERROR**:";
      std::cerr << std::endl << ">> backwardHistoNo found = " << backwardHistoNo[i] << ", which is NOT present in the data file!?!?";
      std::cerr << std::endl << ">> Will quit :-(";
      std::cerr << std::endl;
      // clean up
      forwardHistoNo.clear();
      backwardHistoNo.clear();
      return false;
    }
  }
  
  // keep the time resolution in (us)
  fTimeResolution = runData->GetTimeResolution()/1.0e3;
  std::cout.precision(10);
  std::cout << std::endl << ">> PRunAsymmetry::PrepareData(): time resolution=" << std::fixed << runData->GetTimeResolution() << "(ns)" << std::endl;

  // get all the proper t0's and addt0's for the current RUN block
  if (!GetProperT0(runData, globalBlock, forwardHistoNo, backwardHistoNo)) {
    return false;
  }

  // keep the histo of each group at this point (addruns handled below)
  std::vector<PDoubleVector> forward, backward;
  forward.resize(forwardHistoNo.size());   // resize to number of groups
  for (UInt_t i=0; i<forwardHistoNo.size(); i++) {
    forward[i].resize(runData->GetDataBin(forwardHistoNo[i])->size());
    forward[i]  = *runData->GetDataBin(forwardHistoNo[i]);
  }
  backward.resize(backwardHistoNo.size()); // resize to number of groups
  for (UInt_t i=0; i<backwardHistoNo.size(); i++) {
    backward[i].resize(runData->GetDataBin(backwardHistoNo[i])->size());
    backward[i] = *runData->GetDataBin(backwardHistoNo[i]);
  }

  // check if addrun's are present, and if yes add data
  // check if there are runs to be added to the current one
  if (fRunInfo->GetRunNameSize() > 1) { // runs to be added present
    PRawRunData *addRunData;
    for (UInt_t i=1; i<fRunInfo->GetRunNameSize(); i++) {
      // get run to be added to the main one
      addRunData = fRawData->GetRunData(*(fRunInfo->GetRunName(i)));
      if (addRunData == nullptr) { // couldn't get run
        std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **ERROR** Couldn't get addrun " << fRunInfo->GetRunName(i)->Data() << "!";
        std::cerr << std::endl;
        return false;
      }

      // add forward run
      UInt_t addRunSize;      
      for (UInt_t k=0; k<forwardHistoNo.size(); k++) { // fill each group
        addRunSize = addRunData->GetDataBin(forwardHistoNo[k])->size();
        for (UInt_t j=0; j<addRunData->GetDataBin(forwardHistoNo[k])->size(); j++) { // loop over the bin indices
          // make sure that the index stays in the proper range
          if ((static_cast<Int_t>(j)+static_cast<Int_t>(fAddT0s[i-1][2*k])-static_cast<Int_t>(fT0s[2*k]) >= 0) &&
              (j+static_cast<Int_t>(fAddT0s[i-1][2*k])-static_cast<Int_t>(fT0s[2*k]) < addRunSize)) {
            forward[k][j] += addRunData->GetDataBin(forwardHistoNo[k])->at(j+static_cast<Int_t>(fAddT0s[i-1][2*k])-static_cast<Int_t>(fT0s[2*k]));
          }
        }
      }

      // add backward run
      for (UInt_t k=0; k<backwardHistoNo.size(); k++) { // fill each group
        addRunSize = addRunData->GetDataBin(backwardHistoNo[k])->size();
        for (UInt_t j=0; j<addRunData->GetDataBin(backwardHistoNo[k])->size(); j++) { // loop over the bin indices
          // make sure that the index stays in the proper range
          if ((static_cast<Int_t>(j)+static_cast<Int_t>(fAddT0s[i-1][2*k+1])-static_cast<Int_t>(fT0s[2*k+1]) >= 0) &&
              (j+static_cast<Int_t>(fAddT0s[i-1][2*k+1])-static_cast<Int_t>(fT0s[2*k+1]) < addRunSize)) {
            backward[k][j] += addRunData->GetDataBin(backwardHistoNo[k])->at(j+static_cast<Int_t>(fAddT0s[i-1][2*k+1])-static_cast<Int_t>(fT0s[2*k+1]));
          }
        }
      }
    }
  }

  // set forward/backward histo data of the first group
  fForward.resize(forward[0].size());
  for (UInt_t i=0; i<fForward.size(); i++) {
    fForward[i]  = forward[0][i];
  }
  fBackward.resize(backward[0].size());
  for (UInt_t i=0; i<fBackward.size(); i++) {
    fBackward[i] = backward[0][i];
  }

  // group histograms, add all the remaining forward histograms of the group
  for (UInt_t i=1; i<forwardHistoNo.size(); i++) { // loop over the groupings
    for (UInt_t j=0; j<runData->GetDataBin(forwardHistoNo[i])->size(); j++) { // loop over the bin indices
      // make sure that the index stays within proper range
      if ((j+fT0s[2*i]-fT0s[0] >= 0) && (j+fT0s[2*i]-fT0s[0] < runData->GetDataBin(forwardHistoNo[i])->size())) {
        fForward[j] += forward[i][j+static_cast<Int_t>(fT0s[2*i])-static_cast<Int_t>(fT0s[0])];
      }
    }
  }

  // group histograms, add all the remaining backward histograms of the group
  for (UInt_t i=1; i<backwardHistoNo.size(); i++) { // loop over the groupings
    for (UInt_t j=0; j<runData->GetDataBin(backwardHistoNo[i])->size(); j++) { // loop over the bin indices
      // make sure that the index stays within proper range
      if ((j+fT0s[2*i+1]-fT0s[1] >= 0) && (j+fT0s[2*i+1]-fT0s[1] < runData->GetDataBin(backwardHistoNo[i])->size())) {
        fBackward[j] += backward[i][j+static_cast<Int_t>(fT0s[2*i+1])-static_cast<Int_t>(fT0s[1])];
      }
    }
  }

  // subtract background from histogramms ------------------------------------------
  if (fRunInfo->GetBkgFix(0) == PMUSR_UNDEFINED) { // no fixed background given
    if (fRunInfo->GetBkgRange(0) >= 0) { // background range given
      if (!SubtractEstimatedBkg())
        return false;
    } else { // no background given to do the job, try to estimate it
      fRunInfo->SetBkgRange(static_cast<Int_t>(fT0s[0]*0.1), 0);
      fRunInfo->SetBkgRange(static_cast<Int_t>(fT0s[0]*0.6), 1);
      fRunInfo->SetBkgRange(static_cast<Int_t>(fT0s[1]*0.1), 2);
      fRunInfo->SetBkgRange(static_cast<Int_t>(fT0s[1]*0.6), 3);
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **WARNING** Neither fix background nor background bins are given!";
      std::cerr << std::endl << ">> Will try the following:";
      std::cerr << std::endl << ">> forward:  bkg start = " << fRunInfo->GetBkgRange(0) << ", bkg end = " << fRunInfo->GetBkgRange(1);
      std::cerr << std::endl << ">> backward: bkg start = " << fRunInfo->GetBkgRange(2) << ", bkg end = " << fRunInfo->GetBkgRange(3);
      std::cerr << std::endl << ">> NO WARRANTY THAT THIS MAKES ANY SENSE! Better check ...";
      std::cerr << std::endl;
      if (!SubtractEstimatedBkg())
        return false;
    }
  } else { // fixed background given
    if (!SubtractFixBkg())
      return false;
  }

  UInt_t histoNo[2] = {forwardHistoNo[0], backwardHistoNo[0]};

  // get the data range (fgb/lgb) for the current RUN block
  if (!GetProperDataRange(runData, histoNo)) {
    return false;
  }

  // get the fit range for the current RUN block
  GetProperFitRange(globalBlock);

  // everything looks fine, hence fill data set
  Bool_t status;
  switch(fHandleTag) {
    case kFit:
      status = PrepareFitData();
      break;
    case kView:
      if (fMsrInfo->GetMsrPlotList()->at(0).fRRFPacking == 0)
        status = PrepareViewData(runData, histoNo);
      else
        status = PrepareRRFViewData(runData, histoNo);
      break;
    default:
      status = false;
      break;
  }

  // clean up
  forwardHistoNo.clear();
  backwardHistoNo.clear();

  return status;
}

//--------------------------------------------------------------------------
// SubtractFixBkg (private)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::SubtractFixBkg()
{
  if (fRunInfo->GetBkgFix(0) == PMUSR_UNDEFINED) {
    std::cerr << "PRunAsymmetry::SubtractFixBkg(): **ERROR** no fixed bkg for forward set. Will do nothing here." << std::endl;
    return false;
  }
  if (fRunInfo->GetBkgFix(1) == PMUSR_UNDEFINED) {
    std::cerr << "PRunAsymmetry::SubtractFixBkg(): **ERROR** no fixed bkg for backward set. Will do nothing here." << std::endl;
    std::cerr << "   you need an entry like:" << std::endl;
    std::cerr << "   backgr.fix      2  3" << std::endl;
    std::cerr << "   i.e. two entries for forward and backward." << std::endl;
    return false;
  }


  Double_t dval;

  for (UInt_t i=0; i<fForward.size(); i++) {
    // keep the error, and make sure that the bin is NOT empty
    if (fForward[i] != 0.0)
      dval = TMath::Sqrt(fForward[i]);
    else
      dval = 1.0;
    fForwardErr.push_back(dval);
    fForward[i] -= fRunInfo->GetBkgFix(0);

    // keep the error, and make sure that the bin is NOT empty
    if (fBackward[i] != 0.0)
      dval = TMath::Sqrt(fBackward[i]);
    else
      dval = 1.0;
    fBackwardErr.push_back(dval);
    fBackward[i] -= fRunInfo->GetBkgFix(1);
  }

  return true;
}

//--------------------------------------------------------------------------
// SubtractEstimatedBkg (private)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::SubtractEstimatedBkg()
{
  Double_t beamPeriod = 0.0;

  // check if data are from PSI, RAL, or TRIUMF
  if (fRunInfo->GetInstitute()->Contains("psi"))
    beamPeriod = ACCEL_PERIOD_PSI;
  else if (fRunInfo->GetInstitute()->Contains("ral"))
    beamPeriod = ACCEL_PERIOD_RAL;
  else if (fRunInfo->GetInstitute()->Contains("triumf"))
    beamPeriod = ACCEL_PERIOD_TRIUMF;
  else
    beamPeriod = 0.0;

  // check if start and end are in proper order
  Int_t start[2] = {fRunInfo->GetBkgRange(0), fRunInfo->GetBkgRange(2)};
  Int_t end[2]   = {fRunInfo->GetBkgRange(1), fRunInfo->GetBkgRange(3)};
  for (UInt_t i=0; i<2; i++) {
    if (end[i] < start[i]) {
      std::cout << std::endl << "PRunAsymmetry::SubtractEstimatedBkg(): end = " << end[i] << " > start = " << start[i] << "! Will swap them!";
      UInt_t keep = end[i];
      end[i] = start[i];
      start[i] = keep;
    }
  }

  // calculate proper background range
  for (UInt_t i=0; i<2; i++) {
    if (beamPeriod != 0.0) {
      Double_t timeBkg = static_cast<Double_t>(end[i]-start[i])*(fTimeResolution*fPacking); // length of the background intervall in time
      UInt_t fullCycles = static_cast<UInt_t>(timeBkg/beamPeriod); // how many proton beam cylces can be placed within the proposed background intervall
      // correct the end of the background intervall such that the background is as close as possible to a multiple of the proton cylce
      end[i] = start[i] + static_cast<UInt_t>((fullCycles*beamPeriod)/(fTimeResolution*fPacking));
      std::cout << "PRunAsymmetry::SubtractEstimatedBkg(): Background " << start[i] << ", " << end[i] << std::endl;
      if (end[i] == start[i])
        end[i] = fRunInfo->GetBkgRange(2*i+1);
    }
  }

  // check if start is within histogram bounds
  if ((start[0] < 0) || (start[0] >= fForward.size()) ||
      (start[1] < 0) || (start[1] >= fBackward.size())) {
    std::cerr << std::endl << ">> PRunAsymmetry::SubtractEstimatedBkg(): **ERROR** background bin values out of bound!";
    std::cerr << std::endl << ">> histo lengths (f/b)  = (" << fForward.size() << "/" << fBackward.size() << ").";
    std::cerr << std::endl << ">> background start (f/b) = (" << start[0] << "/" << start[1] << ").";
    return false;
  }

  // check if end is within histogram bounds
  if ((end[0] < 0) || (end[0] >= fForward.size()) ||
      (end[1] < 0) || (end[1] >= fBackward.size())) {
    std::cerr << std::endl << ">> PRunAsymmetry::SubtractEstimatedBkg(): **ERROR** background bin values out of bound!";
    std::cerr << std::endl << ">> histo lengths (f/b)  = (" << fForward.size() << "/" << fBackward.size() << ").";
    std::cerr << std::endl << ">> background end (f/b) = (" << end[0] << "/" << end[1] << ").";
    return false;
  }

  // calculate background
  Double_t bkg[2]    = {0.0, 0.0};
  Double_t errBkg[2] = {0.0, 0.0};

  // forward
  for (UInt_t i=start[0]; i<=end[0]; i++)
    bkg[0] += fForward[i];
  errBkg[0] = TMath::Sqrt(bkg[0])/(end[0] - start[0] + 1);
  bkg[0] /= static_cast<Double_t>(end[0] - start[0] + 1);
  std::cout << std::endl << ">> estimated forward histo background: " << bkg[0];

  // backward
  for (UInt_t i=start[1]; i<=end[1]; i++)
    bkg[1] += fBackward[i];
  errBkg[1] = TMath::Sqrt(bkg[1])/(end[1] - start[1] + 1);
  bkg[1] /= static_cast<Double_t>(end[1] - start[1] + 1);
  std::cout << std::endl << ">> estimated backward histo background: " << bkg[1] << std::endl;

  // correct error for forward, backward
  Double_t errVal = 0.0;
  for (UInt_t i=0; i<fForward.size(); i++) {
    if (fForward[i] > 0.0)
      errVal = TMath::Sqrt(fForward[i]+errBkg[0]*errBkg[0]);
    else
      errVal = 1.0;
    fForwardErr.push_back(errVal);
    if (fBackward[i] > 0.0)
      errVal = TMath::Sqrt(fBackward[i]+errBkg[1]*errBkg[1]);
    else
      errVal = 1.0;
    fBackwardErr.push_back(errVal);
  }

  // subtract background from data
  for (UInt_t i=0; i<fForward.size(); i++) {
    fForward[i]  -= bkg[0];
    fBackward[i] -= bkg[1];
  }

  fRunInfo->SetBkgEstimated(bkg[0], 0);
  fRunInfo->SetBkgEstimated(bkg[1], 1);

  return true;
}

//--------------------------------------------------------------------------
// PrepareFitData (protected)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::PrepareFitData()
{
  // transform raw histo data. This is done the following way (for details see the manual):
  // first rebin the data, than calculate the asymmetry

  // everything looks fine, hence fill packed forward and backward histo
  PRunData forwardPacked;
  PRunData backwardPacked;
  Double_t value = 0.0;
  Double_t error = 0.0;
  // forward
  for (Int_t i=fGoodBins[0]; i<fGoodBins[1]; i++) {
    if (fPacking == 1) {
      forwardPacked.AppendValue(fForward[i]);
      forwardPacked.AppendErrorValue(fForwardErr[i]);
    } else { // packed data, i.e. fPacking > 1
      if (((i-fGoodBins[0]) % fPacking == 0) && (i != fGoodBins[0])) { // fill data
        // in order that after rebinning the fit does not need to be redone (important for plots)
        // the value is normalize to per bin
        value /= fPacking;
        forwardPacked.AppendValue(value);
        if (value == 0.0)
          forwardPacked.AppendErrorValue(1.0);
        else
          forwardPacked.AppendErrorValue(TMath::Sqrt(error)/fPacking);
        value = 0.0;
        error = 0.0;
      }
      value += fForward[i];
      error += fForwardErr[i]*fForwardErr[i];
    }
  }
  // backward
  for (Int_t i=fGoodBins[2]; i<fGoodBins[3]; i++) {
    if (fPacking == 1) {
      backwardPacked.AppendValue(fBackward[i]);
      backwardPacked.AppendErrorValue(fBackwardErr[i]);
    } else { // packed data, i.e. fPacking > 1
      if (((i-fGoodBins[2]) % fPacking == 0) && (i != fGoodBins[2])) { // fill data
        // in order that after rebinning the fit does not need to be redone (important for plots)
        // the value is normalize to per bin
        value /= fPacking;
        backwardPacked.AppendValue(value);
        if (value == 0.0)
          backwardPacked.AppendErrorValue(1.0);
        else
          backwardPacked.AppendErrorValue(TMath::Sqrt(error)/fPacking);
        value = 0.0;
        error = 0.0;
      }
      value += fBackward[i];
      error += fBackwardErr[i]*fBackwardErr[i];
    }
  }

  // check if packed forward and backward hist have the same size, otherwise take the minimum size
  UInt_t noOfBins = forwardPacked.GetValue()->size();
  if (forwardPacked.GetValue()->size() != backwardPacked.GetValue()->size()) {
    if (forwardPacked.GetValue()->size() > backwardPacked.GetValue()->size())
      noOfBins = backwardPacked.GetValue()->size();
  }

  // form asymmetry including error propagation
  Double_t asym;
  Double_t f, b, ef, eb;
  // fill data time start, and step
  // data start time = (binStart - 0.5) + pack/2 - t0, with pack and binStart used as double
  fData.SetDataTimeStart(fTimeResolution*((static_cast<Double_t>(fGoodBins[0])-0.5) + static_cast<Double_t>(fPacking)/2.0 - static_cast<Double_t>(fT0s[0])));
  fData.SetDataTimeStep(fTimeResolution*static_cast<Double_t>(fPacking));
  for (UInt_t i=0; i<noOfBins; i++) {
    // to make the formulae more readable
    f  = forwardPacked.GetValue()->at(i);
    b  = backwardPacked.GetValue()->at(i);
    ef = forwardPacked.GetError()->at(i);
    eb = backwardPacked.GetError()->at(i);
    // check that there are indeed bins
    if (f+b != 0.0)
      asym = (f-b) / (f+b);
    else
      asym = 0.0;
    fData.AppendValue(asym);
    // calculate the error
    if (f+b != 0.0)
      error = 2.0/((f+b)*(f+b))*TMath::Sqrt(b*b*ef*ef+eb*eb*f*f);
    else
      error = 1.0;
    fData.AppendErrorValue(error);
  }

  CalcNoOfFitBins();

  // clean up
  fForward.clear();
  fForwardErr.clear();
  fBackward.clear();
  fBackwardErr.clear();

  return true;
}

//--------------------------------------------------------------------------
// PrepareViewData (protected)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::PrepareViewData(PRawRunData* runData, UInt_t histoNo[2])
{
  // check if view_packing is wished
  Int_t packing = fPacking;
  if (fMsrInfo->GetMsrPlotList()->at(0).fViewPacking > 0) {
    packing = fMsrInfo->GetMsrPlotList()->at(0).fViewPacking;
  }

  // feed the parameter vector
  std::vector<Double_t> par;
  PMsrParamList *paramList = fMsrInfo->GetMsrParamList();
  for (UInt_t i=0; i<paramList->size(); i++)
    par.push_back((*paramList)[i].fValue);

  // transform raw histo data. This is done the following way (for details see the manual):
  // first rebin the data, than calculate the asymmetry

  // first get start data, end data, and t0
  Int_t start[2] = {fGoodBins[0], fGoodBins[2]};
  Int_t end[2] = {fGoodBins[1], fGoodBins[3]};
  Int_t t0[2] = {static_cast<Int_t>(fT0s[0]), static_cast<Int_t>(fT0s[1])};

  // check if the data ranges and t0's between forward/backward are compatible
  Int_t fgb[2];
  if (start[0]-t0[0] != start[1]-t0[1]) { // wrong fgb aligning
    if (abs(start[0]-t0[0]) > abs(start[1]-t0[1])) {
      fgb[0] = start[0];
      fgb[1] = t0[1] + start[0]-t0[0];
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareViewData(): **WARNING** needed to shift backward fgb from ";
      std::cerr << start[1] << " to " << fgb[1] << std::endl;
    } else {
      fgb[0] = t0[0] + start[1]-t0[1];
      fgb[1] = start[1];
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareViewData(): **WARNING** needed to shift forward fgb from ";
      std::cerr << start[0] << " to " << fgb[0] << std::endl;
    }
  } else { // fgb aligning is correct
    fgb[0] = start[0];
    fgb[1] = start[1];
  }

  Int_t val = fgb[0]-packing*(fgb[0]/packing);
  do {
    if (fgb[1] - fgb[0] < 0)
      val += packing;
  } while (val + fgb[1] - fgb[0] < 0);

  start[0] = val;
  start[1] = val + fgb[1] - fgb[0];

  // make sure that there are equal number of rebinned bins in forward and backward
  UInt_t noOfBins0 = (runData->GetDataBin(histoNo[0])->size()-start[0])/packing;
  UInt_t noOfBins1 = (runData->GetDataBin(histoNo[1])->size()-start[1])/packing;
  if (noOfBins0 > noOfBins1)
    noOfBins0 = noOfBins1;
  end[0] = start[0] + noOfBins0 * packing;
  end[1] = start[1] + noOfBins0 * packing;

  // check if start, end, and t0 make any sense
  // 1st check if start and end are in proper order
  for (UInt_t i=0; i<2; i++) {
    if (end[i] < start[i]) { // need to swap them
      Int_t keep = end[i];
      end[i] = start[i];
      start[i] = keep;
    }
    // 2nd check if start is within proper bounds
    if ((start[i] < 0) || (start[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareViewData(): **ERROR** start data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    // 3rd check if end is within proper bounds
    if ((end[i] < 0) || (end[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareViewData(): **ERROR** end data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    // 4th check if t0 is within proper bounds
    if ((t0[i] < 0) || (t0[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareViewData(): **ERROR** t0 data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
  }

  // everything looks fine, hence fill packed forward and backward histo
  PRunData forwardPacked;
  PRunData backwardPacked;
  Double_t value = 0.0;
  Double_t error = 0.0;

  // forward
  for (Int_t i=start[0]; i<end[0]; i++) {
    if (packing == 1) {
      forwardPacked.AppendValue(fForward[i]);
      forwardPacked.AppendErrorValue(fForwardErr[i]);
    } else { // packed data, i.e. packing > 1
      if (((i-start[0]) % packing == 0) && (i != start[0])) { // fill data
        // in order that after rebinning the fit does not need to be redone (important for plots)
        // the value is normalize to per bin
        value /= packing;
        forwardPacked.AppendValue(value);
        if (value == 0.0)
          forwardPacked.AppendErrorValue(1.0);
        else
          forwardPacked.AppendErrorValue(TMath::Sqrt(error)/packing);
        value = 0.0;
        error = 0.0;
      }
      value += fForward[i];
      error += fForwardErr[i]*fForwardErr[i];
    }
  }

  // backward
  for (Int_t i=start[1]; i<end[1]; i++) {
    if (packing == 1) {
      backwardPacked.AppendValue(fBackward[i]);
      backwardPacked.AppendErrorValue(fBackwardErr[i]);
    } else { // packed data, i.e. packing > 1
      if (((i-start[1]) % packing == 0) && (i != start[1])) { // fill data
        // in order that after rebinning the fit does not need to be redone (important for plots)
        // the value is normalize to per bin
        value /= packing;
        backwardPacked.AppendValue(value);
        if (value == 0.0)
          backwardPacked.AppendErrorValue(1.0);
        else
          backwardPacked.AppendErrorValue(TMath::Sqrt(error)/packing);
        value = 0.0;
        error = 0.0;
      }
      value += fBackward[i];
      error += fBackwardErr[i]*fBackwardErr[i];
    }
  }

  // check if packed forward and backward hist have the same size, otherwise take the minimum size
  UInt_t noOfBins = forwardPacked.GetValue()->size();
  if (forwardPacked.GetValue()->size() != backwardPacked.GetValue()->size()) {
    if (forwardPacked.GetValue()->size() > backwardPacked.GetValue()->size())
      noOfBins = backwardPacked.GetValue()->size();
  }

  // form asymmetry including error propagation
  Double_t asym;
  Double_t f, b, ef, eb, alpha = 1.0, beta = 1.0;
  // set data time start, and step
  // data start time = (binStart - 0.5) + pack/2 - t0, with pack and binStart used as double
  fData.SetDataTimeStart(fTimeResolution*((static_cast<Double_t>(start[0])-0.5) + static_cast<Double_t>(packing)/2.0 - static_cast<Double_t>(t0[0])));
  fData.SetDataTimeStep(fTimeResolution*static_cast<Double_t>(packing));

  // get the proper alpha and beta
  switch (fAlphaBetaTag) {
    case 1: // alpha == 1, beta == 1
      alpha = 1.0;
      beta  = 1.0;
      break;
    case 2: // alpha != 1, beta == 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        alpha = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        alpha = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      beta  = 1.0;
      break;
    case 3: // alpha == 1, beta != 1
      alpha = 1.0;
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        beta = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        beta = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    case 4: // alpha != 1, beta != 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        alpha = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        alpha = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        beta = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        beta = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    default:
      break;
  }

  for (UInt_t i=0; i<forwardPacked.GetValue()->size(); i++) {
    // to make the formulae more readable
    f  = forwardPacked.GetValue()->at(i);
    b  = backwardPacked.GetValue()->at(i);
    ef = forwardPacked.GetError()->at(i);
    eb = backwardPacked.GetError()->at(i);
    // check that there are indeed bins
    if (f+b != 0.0)
      asym = (alpha*f-b) / (alpha*beta*f+b);
    else
      asym = 0.0;
    fData.AppendValue(asym);
    // calculate the error
    if (f+b != 0.0)
      error = 2.0/((f+b)*(f+b))*TMath::Sqrt(b*b*ef*ef+eb*eb*f*f);
    else
      error = 1.0;
    fData.AppendErrorValue(error);
  }

  CalcNoOfFitBins();

  // clean up
  fForward.clear();
  fForwardErr.clear();
  fBackward.clear();
  fBackwardErr.clear();

  // fill theory vector for kView
  // calculate functions
  for (Int_t i=0; i<fMsrInfo->GetNoOfFuncs(); i++) {
    fFuncValues[i] = fMsrInfo->EvalFunc(fMsrInfo->GetFuncNo(i), *fRunInfo->GetMap(), par, fMetaData);
  }

  // calculate theory
  Double_t time;
  UInt_t size = runData->GetDataBin(histoNo[0])->size()/packing;
  Int_t factor = 8; // 8 times more points for the theory (if fTheoAsData == false)

  fData.SetTheoryTimeStart(fData.GetDataTimeStart());
  if (fTheoAsData) { // calculate theory only at the data points
    fData.SetTheoryTimeStep(fData.GetDataTimeStep());
  } else {
    // finer binning for the theory (8 times as many points = factor)
    size *= factor;
    fData.SetTheoryTimeStep(fData.GetDataTimeStep()/(Double_t)factor);
  }

  for (UInt_t i=0; i<size; i++) {
    time = fData.GetTheoryTimeStart() + static_cast<Double_t>(i)*fData.GetTheoryTimeStep();
    value = fTheory->Func(time, par, fFuncValues);
    if (fabs(value) > 10.0) {  // dirty hack needs to be fixed!!
      value = 0.0;
    }
    fData.AppendTheoryValue(value);
  }

  // clean up
  par.clear();

  return true;
}

//--------------------------------------------------------------------------
// PrepareRRFViewData (protected)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::PrepareRRFViewData(PRawRunData* runData, UInt_t histoNo[2])
{
  // feed the parameter vector
  std::vector<Double_t> par;
  PMsrParamList *paramList = fMsrInfo->GetMsrParamList();
  for (UInt_t i=0; i<paramList->size(); i++)
    par.push_back((*paramList)[i].fValue);

  // ------------------------------------------------------------
  // 1. make all necessary checks
  // ------------------------------------------------------------

  // first get start data, end data, and t0
  Int_t start[2] = {fGoodBins[0], fGoodBins[2]};
  Int_t end[2] = {fGoodBins[1], fGoodBins[3]};
  Int_t t0[2] = {static_cast<Int_t>(fT0s[0]), static_cast<Int_t>(fT0s[1])};
  UInt_t packing = fMsrInfo->GetMsrPlotList()->at(0).fRRFPacking;

  // check if the data ranges and t0's between forward/backward are compatible
  Int_t fgb[2];
  if (start[0]-t0[0] != start[1]-t0[1]) { // wrong fgb aligning
    if (abs(start[0]-t0[0]) > abs(start[1]-t0[1])) {
      fgb[0] = start[0];
      fgb[1] = t0[1] + start[0]-t0[0];
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareRRFViewData(): **WARNING** needed to shift backward fgb from ";
      std::cerr << start[1] << " to " << fgb[1] << std::endl;
    } else {
      fgb[0] = t0[0] + start[1]-t0[1];
      fgb[1] = start[1];
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareRRFViewData(): **WARNING** needed to shift forward fgb from ";
      std::cerr << start[1] << " to " << fgb[0] << std::endl;
    }
  } else { // fgb aligning is correct
    fgb[0] = start[0];
    fgb[1] = start[1];
  }

  Int_t val = fgb[0]-packing*(fgb[0]/packing);
  do {
    if (fgb[1] - fgb[0] < 0)
      val += packing;
  } while (val + fgb[1] - fgb[0] < 0);

  start[0] = val;
  start[1] = val + fgb[1] - fgb[0];

  // make sure that there are equal number of rebinned bins in forward and backward
  UInt_t noOfBins0 = runData->GetDataBin(histoNo[0])->size()-start[0];
  UInt_t noOfBins1 = runData->GetDataBin(histoNo[1])->size()-start[1];
  if (noOfBins0 > noOfBins1)
    noOfBins0 = noOfBins1;
  end[0] = start[0] + noOfBins0;
  end[1] = start[1] + noOfBins0;

  // check if start, end, and t0 make any sense
  // 1st check if start and end are in proper order
  for (UInt_t i=0; i<2; i++) {
    if (end[i] < start[i]) { // need to swap them
      Int_t keep = end[i];
      end[i] = start[i];
      start[i] = keep;
    }
    // 2nd check if start is within proper bounds
    if ((start[i] < 0) || (start[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareRRFViewData(): **ERROR** start data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    // 3rd check if end is within proper bounds
    if ((end[i] < 0) || (end[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareRRFViewData(): **ERROR** end data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    // 4th check if t0 is within proper bounds
    if ((t0[i] < 0) || (t0[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareRRFViewData(): **ERROR** t0 data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
  }

  // ------------------------------------------------------------
  // 2. build the asymmetry [A(t)] WITHOUT packing.
  // ------------------------------------------------------------

  PDoubleVector forward, forwardErr;
  PDoubleVector backward, backwardErr;
  Double_t error = 0.0;
  // forward
  for (Int_t i=start[0]; i<end[0]; i++) {
    forward.push_back(fForward[i]);
    forwardErr.push_back(fForwardErr[i]);
  }
  // backward
  for (Int_t i=start[1]; i<end[1]; i++) {
    backward.push_back(fBackward[i]);
    backwardErr.push_back(fBackwardErr[i]);
  }

  // check if packed forward and backward hist have the same size, otherwise take the minimum size
  UInt_t noOfBins = forward.size();
  if (forward.size() != backward.size()) {
    if (forward.size() > backward.size())
      noOfBins = backward.size();
  }

  // form asymmetry including error propagation
  PDoubleVector asymmetry, asymmetryErr;
  Double_t asym;
  Double_t f, b, ef, eb, alpha = 1.0, beta = 1.0;

  // get the proper alpha and beta
  switch (fAlphaBetaTag) {
    case 1: // alpha == 1, beta == 1
      alpha = 1.0;
      beta  = 1.0;
      break;
    case 2: // alpha != 1, beta == 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        alpha = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        alpha = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      beta  = 1.0;
      break;
    case 3: // alpha == 1, beta != 1
      alpha = 1.0;
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        beta = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        beta = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    case 4: // alpha != 1, beta != 1
      if (fRunInfo->GetAlphaParamNo() < MSR_PARAM_FUN_OFFSET) { // alpha is a parameter
        alpha = par[fRunInfo->GetAlphaParamNo()-1];
      } else { // alpha is function
        // get function number
        UInt_t funNo = fRunInfo->GetAlphaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        alpha = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      if (fRunInfo->GetBetaParamNo() < MSR_PARAM_FUN_OFFSET) { // beta is a parameter
        beta = par[fRunInfo->GetBetaParamNo()-1];
      } else { // beta is a function
        // get function number
        UInt_t funNo = fRunInfo->GetBetaParamNo()-MSR_PARAM_FUN_OFFSET;
        // evaluate function
        beta = fMsrInfo->EvalFunc(funNo, *fRunInfo->GetMap(), par, fMetaData);
      }
      break;
    default:
      break;
  }

  for (UInt_t i=0; i<noOfBins; i++) {
    // to make the formulae more readable
    f  = forward[i];
    b  = backward[i];
    ef = forwardErr[i];
    eb = backwardErr[i];
    // check that there are indeed bins
    if (f+b != 0.0)
      asym = (alpha*f-b) / (alpha*beta*f+b);
    else
      asym = 0.0;
    asymmetry.push_back(asym);
    // calculate the error
    if (f+b != 0.0)
      error = 2.0/((f+b)*(f+b))*TMath::Sqrt(b*b*ef*ef+eb*eb*f*f);
    else
      error = 1.0;
    asymmetryErr.push_back(error);
  }

  // clean up
  fForward.clear();
  fForwardErr.clear();
  fBackward.clear();
  fBackwardErr.clear();


  // ------------------------------------------------------------
  // 3. A_R(t) = A(t) * 2 cos(w_R t + phi_R)
  // ------------------------------------------------------------

  // check which units shall be used
  Double_t gammaRRF = 0.0, wRRF = 0.0, phaseRRF = 0.0;
  Double_t time;

  switch (fMsrInfo->GetMsrPlotList()->at(0).fRRFUnit) {
    case RRF_UNIT_kHz:
      gammaRRF = TMath::TwoPi()*1.0e-3;
      break;
    case RRF_UNIT_MHz:
      gammaRRF = TMath::TwoPi();
      break;
    case RRF_UNIT_Mcs:
      gammaRRF = 1.0;
      break;
    case RRF_UNIT_G:
      gammaRRF = GAMMA_BAR_MUON*TMath::TwoPi();
      break;
    case RRF_UNIT_T:
      gammaRRF = GAMMA_BAR_MUON*TMath::TwoPi()*1.0e4;
      break;
    default:
      gammaRRF = TMath::TwoPi();
      break;
  }
  wRRF = gammaRRF * fMsrInfo->GetMsrPlotList()->at(0).fRRFFreq;
  phaseRRF = fMsrInfo->GetMsrPlotList()->at(0).fRRFPhase / 180.0 * TMath::Pi();

  for (UInt_t i=0; i<asymmetry.size(); i++) {
    time = fTimeResolution*(static_cast<Double_t>(start[0])-t0[0]+static_cast<Double_t>(i));
    asymmetry[i] *= 2.0*TMath::Cos(wRRF*time+phaseRRF);
  }

  // ------------------------------------------------------------
  // 4. do the packing of A_R(t)
  // ------------------------------------------------------------
  Double_t value = 0.0;
  error = 0.0;
  for (UInt_t i=0; i<asymmetry.size(); i++) {
    if ((i % packing == 0) && (i != 0)) {
      value /= packing;
      fData.AppendValue(value);
      fData.AppendErrorValue(TMath::Sqrt(error)/packing);

      value = 0.0;
      error = 0.0;
    }
    value += asymmetry[i];
    error += asymmetryErr[i]*asymmetryErr[i];
  }

  // set data time start, and step
  // data start time = (binStart - 0.5) + pack/2 - t0, with pack and binStart used as double
  fData.SetDataTimeStart(fTimeResolution*((static_cast<Double_t>(start[0])-0.5) + static_cast<Double_t>(packing)/2.0 - static_cast<Double_t>(t0[0])));
  fData.SetDataTimeStep(fTimeResolution*static_cast<Double_t>(packing));

  // ------------------------------------------------------------
  // 5. calculate theory [T(t)] as close as possible to the time resolution [compatible with the RRF frequency]
  // 6. T_R(t) = T(t) * 2 cos(w_R t + phi_R)
  // ------------------------------------------------------------
  UInt_t rebinRRF = static_cast<UInt_t>((TMath::Pi()/2.0/wRRF)/fTimeResolution); // RRF time resolution / data time resolution
  fData.SetTheoryTimeStart(fData.GetDataTimeStart());
  fData.SetTheoryTimeStep(TMath::Pi()/2.0/wRRF/rebinRRF); // = theory time resolution as close as possible to the data time resolution compatible with wRRF

  // calculate functions
  for (Int_t i=0; i<fMsrInfo->GetNoOfFuncs(); i++) {
    fFuncValues[i] = fMsrInfo->EvalFunc(fMsrInfo->GetFuncNo(i), *fRunInfo->GetMap(), par, fMetaData);
  }

  Double_t theoryValue;
  for (UInt_t i=0; i<asymmetry.size(); i++) {
    time = fData.GetTheoryTimeStart() + static_cast<Double_t>(i)*fData.GetTheoryTimeStep();
    theoryValue = fTheory->Func(time, par, fFuncValues);
    theoryValue *= 2.0*TMath::Cos(wRRF * time + phaseRRF);

    if (fabs(theoryValue) > 10.0) { // dirty hack needs to be fixed!!
      theoryValue = 0.0;
    }

    fData.AppendTheoryValue(theoryValue);
  }

  // ------------------------------------------------------------
  // 7. do the packing of T_R(t)
  // ------------------------------------------------------------

  PDoubleVector theo;
  Double_t dval = 0.0;
  for (UInt_t i=0; i<fData.GetTheory()->size(); i++) {
    if ((i % rebinRRF == 0) && (i != 0)) {
      theo.push_back(dval/rebinRRF);
      dval = 0.0;
    }
    dval += fData.GetTheory()->at(i);
  }
  fData.ReplaceTheory(theo);
  theo.clear();

  // set the theory time start and step size
  fData.SetTheoryTimeStart(fData.GetTheoryTimeStart()+static_cast<Double_t>(rebinRRF-1)*fData.GetTheoryTimeStep()/2.0);
  fData.SetTheoryTimeStep(rebinRRF*fData.GetTheoryTimeStep());

  // ------------------------------------------------------------
  // 8. calculate the Kaiser FIR filter coefficients
  // ------------------------------------------------------------
  CalculateKaiserFilterCoeff(wRRF, 60.0, 0.2); // w_c = wRRF, A = -20 log_10(delta), Delta w / w_c = (w_s - w_p) / (2 w_c)

  // ------------------------------------------------------------
  // 9. filter T_R(t)
  // ------------------------------------------------------------
  FilterTheo();

  // clean up
  par.clear();
  forward.clear();
  forwardErr.clear();
  backward.clear();
  backwardErr.clear();
  asymmetry.clear();
  asymmetryErr.clear();

  return true;
}

//--------------------------------------------------------------------------
// GetProperT0 (private)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::GetProperT0(PRawRunData* runData, PMsrGlobalBlock *globalBlock, PUIntVector &forwardHistoNo, PUIntVector &backwardHistoNo)
{
  // feed all T0's
  // first init T0's, T0's are stored as (forward T0, backward T0, etc.)
  fT0s.clear();
  // this strange fT0 size estimate is needed in case #forw histos != #back histos
  size_t size = 2*forwardHistoNo.size();
  if (backwardHistoNo.size() > forwardHistoNo.size())
    size = 2*backwardHistoNo.size();
  fT0s.resize(size);
  for (UInt_t i=0; i<fT0s.size(); i++) {
    fT0s[i] = -1.0;
  }

  // fill in the T0's from the msr-file (if present)
  for (UInt_t i=0; i<fRunInfo->GetT0BinSize(); i++) {
    fT0s[i] = fRunInfo->GetT0Bin(i);
  }

  // fill in the missing T0's from the GLOBAL block section (if present)
  for (UInt_t i=0; i<globalBlock->GetT0BinSize(); i++) {
    if (fT0s[i] == -1) { // i.e. not given in the RUN block section
      fT0s[i] = globalBlock->GetT0Bin(i);
    }
  }

  // fill in the missing T0's from the data file, if not already present in the msr-file
  for (UInt_t i=0; i<forwardHistoNo.size(); i++) {
    if (fT0s[2*i] == -1.0) // i.e. not present in the msr-file, try the data file
      if (runData->GetT0Bin(forwardHistoNo[i]) > 0.0) {
        fT0s[2*i] = runData->GetT0Bin(forwardHistoNo[i]);
        fRunInfo->SetT0Bin(fT0s[2*i], 2*i);
      }
  }
  for (UInt_t i=0; i<backwardHistoNo.size(); i++) {
    if (fT0s[2*i+1] == -1.0) // i.e. not present in the msr-file, try the data file
      if (runData->GetT0Bin(backwardHistoNo[i]) > 0.0) {
        fT0s[2*i+1] = runData->GetT0Bin(backwardHistoNo[i]);
        fRunInfo->SetT0Bin(fT0s[2*i+1], 2*i+1);
      }
  }

  // fill in the T0's gaps, i.e. in case the T0's are NEITHER in the msr-file and NOR in the data file
  for (UInt_t i=0; i<forwardHistoNo.size(); i++) {
    if (fT0s[2*i] == -1.0) { // i.e. not present in the msr-file and data file, use the estimated T0
      fT0s[2*i] = runData->GetT0BinEstimated(forwardHistoNo[i]);
      fRunInfo->SetT0Bin(fT0s[2*i], 2*i);

      std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **WARRNING** NO t0's found, neither in the run data nor in the msr-file!";
      std::cerr << std::endl << ">> run: " << fRunInfo->GetRunName()->Data();
      std::cerr << std::endl << ">> will try the estimated one: forward t0 = " << runData->GetT0BinEstimated(forwardHistoNo[i]);
      std::cerr << std::endl << ">> NO WARRANTY THAT THIS OK!! For instance for LEM this is almost for sure rubbish!";
      std::cerr << std::endl;
    }
  }
  for (UInt_t i=0; i<backwardHistoNo.size(); i++) {
    if (fT0s[2*i+1] == -1.0) { // i.e. not present in the msr-file and data file, use the estimated T0
      fT0s[2*i+1] = runData->GetT0BinEstimated(backwardHistoNo[i]);
      fRunInfo->SetT0Bin(fT0s[2*i+1], 2*i+1);

      std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **WARRNING** NO t0's found, neither in the run data nor in the msr-file!";
      std::cerr << std::endl << ">> run: " << fRunInfo->GetRunName()->Data();
      std::cerr << std::endl << ">> will try the estimated one: backward t0 = " << runData->GetT0BinEstimated(backwardHistoNo[i]);
      std::cerr << std::endl << ">> NO WARRANTY THAT THIS OK!! For instance for LEM this is almost for sure rubbish!";
      std::cerr << std::endl;
    }
  }

  // check if t0 is within proper bounds
  for (UInt_t i=0; i<forwardHistoNo.size(); i++) {
    if ((fT0s[2*i] < 0) || (fT0s[2*i] > static_cast<Int_t>(runData->GetDataBin(forwardHistoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **ERROR** t0 data bin (" << fT0s[2*i] << ") doesn't make any sense!";
      std::cerr << std::endl << ">> forwardHistoNo " << forwardHistoNo[i];
      std::cerr << std::endl;
      return false;
    }
  }
  for (UInt_t i=0; i<backwardHistoNo.size(); i++) {
    if ((fT0s[2*i+1] < 0) || (fT0s[2*i+1] > static_cast<Int_t>(runData->GetDataBin(backwardHistoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::PrepareData(): **ERROR** t0 data bin (" << fT0s[2*i+1] << ") doesn't make any sense!";
      std::cerr << std::endl << ">> backwardHistoNo " << backwardHistoNo[i];
      std::cerr << std::endl;
      return false;
    }
  }

  // check if addrun's are present, and if yes add the necessary t0's
  if (fRunInfo->GetRunNameSize() > 1) { // runs to be added present
    PRawRunData *addRunData;
    fAddT0s.resize(fRunInfo->GetRunNameSize()-1); // resize to the number of addruns
    for (UInt_t i=1; i<fRunInfo->GetRunNameSize(); i++) {
      // get run to be added to the main one
      addRunData = fRawData->GetRunData(*(fRunInfo->GetRunName(i)));
      if (addRunData == 0) { // couldn't get run
        std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **ERROR** Couldn't get addrun " << fRunInfo->GetRunName(i)->Data() << "!";
        std::cerr << std::endl;
        return false;
      }

      // feed all T0's
      // first init T0's, T0's are stored as (forward T0, backward T0, etc.)
      fAddT0s[i-1].clear();
      fAddT0s[i-1].resize(2*forwardHistoNo.size());
      for (UInt_t j=0; j<fAddT0s[i-1].size(); j++) {
        fAddT0s[i-1][j] = -1.0;
      }

      // fill in the T0's from the msr-file (if present)
      for (Int_t j=0; j<fRunInfo->GetAddT0BinSize(i-1); j++) {
        fAddT0s[i-1][j] = fRunInfo->GetAddT0Bin(i-1, j);
      }

      // fill in the T0's from the data file, if not already present in the msr-file
      for (UInt_t j=0; j<forwardHistoNo.size(); j++) {
        if (fAddT0s[i-1][2*j] == -1.0) // i.e. not present in the msr-file, try the data file
          if (addRunData->GetT0Bin(forwardHistoNo[j]) > 0.0) {
            fAddT0s[i-1][2*j] = addRunData->GetT0Bin(forwardHistoNo[j]);
            fRunInfo->SetAddT0Bin(fAddT0s[i-1][2*j], i-1, 2*j);
          }
      }
      for (UInt_t j=0; j<backwardHistoNo.size(); j++) {
        if (fAddT0s[i-1][2*j+1] == -1.0) // i.e. not present in the msr-file, try the data file
          if (addRunData->GetT0Bin(backwardHistoNo[j]) > 0.0) {
            fAddT0s[i-1][2*j+1] = addRunData->GetT0Bin(backwardHistoNo[j]);
            fRunInfo->SetAddT0Bin(fAddT0s[i-1][2*j+1], i-1, 2*j+1);
          }
      }

      // fill in the T0's gaps, i.e. in case the T0's are NOT in the msr-file and NOT in the data file
      for (UInt_t j=0; j<forwardHistoNo.size(); j++) {
        if (fAddT0s[i-1][2*j] == -1.0) { // i.e. not present in the msr-file and data file, use the estimated T0
          fAddT0s[i-1][2*j] = addRunData->GetT0BinEstimated(forwardHistoNo[j]);
          fRunInfo->SetAddT0Bin(fAddT0s[i-1][2*j], i-1, 2*j);

          std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **WARRNING** NO t0's found, neither in the run data nor in the msr-file!";
          std::cerr << std::endl << ">> run: " << fRunInfo->GetRunName(i)->Data();
          std::cerr << std::endl << ">> will try the estimated one: forward t0 = " << addRunData->GetT0BinEstimated(forwardHistoNo[j]);
          std::cerr << std::endl << ">> NO WARRANTY THAT THIS OK!! For instance for LEM this is almost for sure rubbish!";
          std::cerr << std::endl;
        }
      }
      for (UInt_t j=0; j<backwardHistoNo.size(); j++) {
        if (fAddT0s[i-1][2*j+1] == -1.0) { // i.e. not present in the msr-file and data file, use the estimated T0
          fAddT0s[i-1][2*j+1] = addRunData->GetT0BinEstimated(backwardHistoNo[j]);
          fRunInfo->SetAddT0Bin(fAddT0s[i-1][2*j+1], i-1, 2*j+1);

          std::cerr << std::endl << ">> PRunAsymmetry::GetProperT0(): **WARRNING** NO t0's found, neither in the run data nor in the msr-file!";
          std::cerr << std::endl << ">> run: " << fRunInfo->GetRunName(i)->Data();
          std::cerr << std::endl << ">> will try the estimated one: backward t0 = " << runData->GetT0BinEstimated(backwardHistoNo[j]);
          std::cerr << std::endl << ">> NO WARRANTY THAT THIS OK!! For instance for LEM this is almost for sure rubbish!";
          std::cerr << std::endl;
        }
      }
    }
  }

  return true;
}

//--------------------------------------------------------------------------
// GetProperDataRange (private)
//--------------------------------------------------------------------------
Bool_t PRunAsymmetry::GetProperDataRange(PRawRunData* runData, UInt_t histoNo[2])
{
  // first get start/end data
  Int_t start[2] = {fRunInfo->GetDataRange(0), fRunInfo->GetDataRange(2)};
  Int_t end[2]   = {fRunInfo->GetDataRange(1), fRunInfo->GetDataRange(3)};
  // check if data range has been provided in the RUN block. If not, try the GLOBAL block
  if (start[0] == -1) {
    start[0] = fMsrInfo->GetMsrGlobal()->GetDataRange(0);
  }
  if (start[1] == -1) {
    start[1] = fMsrInfo->GetMsrGlobal()->GetDataRange(2);
  }
  if (end[0] == -1) {
    end[0] = fMsrInfo->GetMsrGlobal()->GetDataRange(1);
  }
  if (end[1] == -1) {
    end[1] = fMsrInfo->GetMsrGlobal()->GetDataRange(3);
  }

  Double_t t0[2] = {fT0s[0], fT0s[1]};
  Int_t offset = static_cast<Int_t>((10.0e-3/fTimeResolution)); // needed in case first good bin is not given, default = 10ns

  // check if data range has been provided, and if not try to estimate them
  if (start[0] < 0) {
    start[0] = static_cast<Int_t>(t0[0])+offset;
    fRunInfo->SetDataRange(start[0], 0);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **WARNING** data range (forward) was not provided, will try data range start = t0+" << offset << "(=10ns) = " << start[0] << ".";
    std::cerr << std::endl << ">> NO WARRANTY THAT THIS DOES MAKE ANY SENSE.";
    std::cerr << std::endl;
  }
  if (start[1] < 0) {
    start[1] = static_cast<Int_t>(t0[1])+offset;
    fRunInfo->SetDataRange(start[1], 2);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **WARNING** data range (backward) was not provided, will try data range start = t0+" << offset << "(=10ns) = " << start[1] << ".";
    std::cerr << std::endl << ">> NO WARRANTY THAT THIS DOES MAKE ANY SENSE.";
    std::cerr << std::endl;
  }
  if (end[0] < 0) {
    end[0] = runData->GetDataBin(histoNo[0])->size();
    fRunInfo->SetDataRange(end[0], 1);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **WARNING** data range (forward) was not provided, will try data range end = " << end[0] << ".";
    std::cerr << std::endl << ">> NO WARRANTY THAT THIS DOES MAKE ANY SENSE.";
    std::cerr << std::endl;
  }
  if (end[1] < 0) {
    end[1] = runData->GetDataBin(histoNo[1])->size();
    fRunInfo->SetDataRange(end[1], 3);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **WARNING** data range (backward) was not provided, will try data range end = " << end[1] << ".";
    std::cerr << std::endl << ">> NO WARRANTY THAT THIS DOES MAKE ANY SENSE.";
    std::cerr << std::endl;
  }

  // check if start, end, and t0 make any sense
  // 1st check if start and end are in proper order
  for (UInt_t i=0; i<2; i++) {
    if (end[i] < start[i]) { // need to swap them
      Int_t keep = end[i];
      end[i] = start[i];
      start[i] = keep;
    }
    // 2nd check if start is within proper bounds
    if ((start[i] < 0) || (start[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **ERROR** start data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    // 3rd check if end is within proper bounds
    if (end[i] < 0) {
      std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **ERROR** end data bin (" << end[i] << ") doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
    if (end[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size())) {
      std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **WARNING** end data bin (" << end[i] << ") > histo length (" << static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()) << ").";
      std::cerr << std::endl << ">>    Will set end = (histo length - 1). Consider to change it in the msr-file." << std::endl;
      std::cerr << std::endl;
      end[i] = static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size())-1;
    }
    // 4th check if t0 is within proper bounds
    if ((t0[i] < 0) || (t0[i] > static_cast<Int_t>(runData->GetDataBin(histoNo[i])->size()))) {
      std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange(): **ERROR** t0 data bin doesn't make any sense!";
      std::cerr << std::endl;
      return false;
    }
  }

  // check that start-t0 is the same for forward as for backward, otherwise take max(start[i]-t0[i])
  if (fabs(static_cast<Double_t>(start[0])-t0[0]) > fabs(static_cast<Double_t>(start[1])-t0[1])){
    start[1] = static_cast<Int_t>(t0[1] + static_cast<Double_t>(start[0]) - t0[0]);
    end[1] = static_cast<Int_t>(t0[1] + static_cast<Double_t>(end[0]) - t0[0]);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift backward data range.";
    std::cerr << std::endl << ">> given: " << fRunInfo->GetDataRange(2) << ", " << fRunInfo->GetDataRange(3);
    std::cerr << std::endl << ">> used : " << start[1] << ", " << end[1];
    std::cerr << std::endl;
  }
  if (fabs(static_cast<Double_t>(start[0])-t0[0]) < fabs(static_cast<Double_t>(start[1])-t0[1])){
    start[0] = static_cast<Int_t>(t0[0] + static_cast<Double_t>(start[1]) - t0[1]);
    end[0] = static_cast<Int_t>(t0[0] + static_cast<Double_t>(end[1]) - t0[1]);
    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift forward data range.";
    std::cerr << std::endl << ">> given: " << fRunInfo->GetDataRange(0) << ", " << fRunInfo->GetDataRange(1);
    std::cerr << std::endl << ">> used : " << start[0] << ", " << end[0];
    std::cerr << std::endl;
  }

  // keep good bins for potential latter use
  fGoodBins[0] = start[0];
  fGoodBins[1] = end[0];
  fGoodBins[2] = start[1];
  fGoodBins[3] = end[1];

  return true;
}

//--------------------------------------------------------------------------
// GetProperFitRange (private)
//--------------------------------------------------------------------------
void PRunAsymmetry::GetProperFitRange(PMsrGlobalBlock *globalBlock)
{
  // set fit start/end time; first check RUN Block
  fFitStartTime = fRunInfo->GetFitRange(0);
  fFitEndTime   = fRunInfo->GetFitRange(1);
  // if fit range is given in bins (and not time), the fit start/end time can be calculated at this point now
  if (fRunInfo->IsFitRangeInBin()) {
    fFitStartTime = (fGoodBins[0] + fRunInfo->GetFitRangeOffset(0) - fT0s[0]) * fTimeResolution; // (fgb+n0-t0)*dt
    fFitEndTime = (fGoodBins[1] - fRunInfo->GetFitRangeOffset(1) - fT0s[0]) * fTimeResolution;   // (lgb-n1-t0)*dt
    // write these times back into the data structure. This way it is available when writting the log-file
    fRunInfo->SetFitRange(fFitStartTime, 0);
    fRunInfo->SetFitRange(fFitEndTime, 1);
  }
  if (fFitStartTime == PMUSR_UNDEFINED) { // fit start/end NOT found in the RUN block, check GLOBAL block
    fFitStartTime = globalBlock->GetFitRange(0);
    fFitEndTime   = globalBlock->GetFitRange(1);
    // if fit range is given in bins (and not time), the fit start/end time can be calculated at this point now
    if (globalBlock->IsFitRangeInBin()) {
      fFitStartTime = (fGoodBins[0] + globalBlock->GetFitRangeOffset(0) - fT0s[0]) * fTimeResolution; // (fgb+n0-t0)*dt
      fFitEndTime = (fGoodBins[1] - globalBlock->GetFitRangeOffset(1) - fT0s[0]) * fTimeResolution;   // (lgb-n1-t0)*dt
      // write these times back into the data structure. This way it is available when writting the log-file
      globalBlock->SetFitRange(fFitStartTime, 0);
      globalBlock->SetFitRange(fFitEndTime, 1);
    }
  }
  if ((fFitStartTime == PMUSR_UNDEFINED) || (fFitEndTime == PMUSR_UNDEFINED)) {
    fFitStartTime = (fGoodBins[0] - fT0s[0]) * fTimeResolution; // (fgb-t0)*dt
    fFitEndTime = (fGoodBins[1] - fT0s[0]) * fTimeResolution;   // (lgb-t0)*dt
    std::cerr << ">> PRunSingleHisto::GetProperFitRange(): **WARNING** Couldn't get fit start/end time!" << std::endl;
    std::cerr << ">>    Will set it to fgb/lgb which given in time is: " << fFitStartTime << "..." << fFitEndTime << " (usec)" << std::endl;
  }
}