BeamMonitorBx.cc

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/*
 * \file BeamMonitorBx.cc
 * \author Geng-yuan Jeng/UC Riverside
 *         Francisco Yumiceva/FNAL
 *
 */

#include "DQM/BeamMonitor/plugins/BeamMonitorBx.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"
#include "DataFormats/Common/interface/View.h"
#include "RecoVertex/BeamSpotProducer/interface/BSFitter.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/Framework/interface/Run.h"
#include "FWCore/Framework/interface/LuminosityBlock.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <numeric>
#include <math.h>
#include <TMath.h>
#include <iostream>
#include <TStyle.h>

using namespace std;
using namespace edm;
using namespace reco;

const char * BeamMonitorBx::formatFitTime( const time_t & t )  {
#define CET (+1)
#define CEST (+2)

  static char ts[] = "yyyy-Mm-dd hh:mm:ss";
  tm * ptm;
  ptm = gmtime ( &t );
  sprintf( ts, "%4d-%02d-%02d %02d:%02d:%02d", ptm->tm_year,ptm->tm_mon+1,ptm->tm_mday,(ptm->tm_hour+CEST)%24, ptm->tm_min, ptm->tm_sec);

#ifdef STRIP_TRAILING_BLANKS_IN_TIMEZONE
  unsigned int b = strlen(ts);
  while (ts[--b] == ' ') {ts[b] = 0;}
#endif
  return ts;

}

//
// constructors and destructor
//
BeamMonitorBx::BeamMonitorBx( const ParameterSet& ps ) :
  countBx_(0),countEvt_(0),countLumi_(0),resetHistos_(false) {

  parameters_     = ps;
  monitorName_    = parameters_.getUntrackedParameter<string>("monitorName","YourSubsystemName");
  bsSrc_          = parameters_.getUntrackedParameter<InputTag>("beamSpot");
  fitNLumi_       = parameters_.getUntrackedParameter<int>("fitEveryNLumi",-1);
  resetFitNLumi_  = parameters_.getUntrackedParameter<int>("resetEveryNLumi",-1);

  dbe_            = Service<DQMStore>().operator->();

  if (monitorName_ != "" ) monitorName_ = monitorName_+"/" ;

  theBeamFitter = new BeamFitter(parameters_, consumesCollector());
  theBeamFitter->resetTrkVector();
  theBeamFitter->resetLSRange();
  theBeamFitter->resetRefTime();
  theBeamFitter->resetPVFitter();

  if (fitNLumi_ <= 0) fitNLumi_ = 1;
  beginLumiOfBSFit_ = endLumiOfBSFit_ = 0;
  refBStime[0] = refBStime[1] = 0;
  lastlumi_ = 0;
  nextlumi_ = 0;
  firstlumi_ = 0;
  processed_ = false;
  countGoodFit_ = 0;
}


BeamMonitorBx::~BeamMonitorBx() {
  delete theBeamFitter;
}


//--------------------------------------------------------
void BeamMonitorBx::beginJob() {
  varMap["x0_bx"] = "X_{0}";
  varMap["y0_bx"] = "Y_{0}";
  varMap["z0_bx"] = "Z_{0}";
  varMap["sigmaX_bx"] = "#sigma_{X}";
  varMap["sigmaY_bx"] = "#sigma_{Y}";
  varMap["sigmaZ_bx"] = "#sigma_{Z}";

  varMap1["x"] = "X_{0} [cm]";
  varMap1["y"] = "Y_{0} [cm]";
  varMap1["z"] = "Z_{0} [cm]";
  varMap1["sigmaX"] = "#sigma_{X} [cm]";
  varMap1["sigmaY"] = "#sigma_{Y} [cm]";
  varMap1["sigmaZ"] = "#sigma_{Z} [cm]";

  // create and cd into new folder
  dbe_->setCurrentFolder(monitorName_+"FitBx");
  // Results of good fit:
  BookTables(1,varMap,"");
  //if (resetFitNLumi_ > 0) BookTables(1,varMap,"all");

  // create and cd into new folders
  for (std::map<std::string,std::string>::const_iterator varName = varMap1.begin();
       varName != varMap1.end(); ++varName) {
    string subDir_ = "FitBx";
    subDir_ += "/";
    subDir_ += "All_";
    subDir_ += varName->first;
    dbe_->setCurrentFolder(monitorName_+subDir_);
  }
  dbe_->setCurrentFolder(monitorName_+"FitBx/All_nPVs");
}

//--------------------------------------------------------
void BeamMonitorBx::beginRun(const edm::Run& r, const EventSetup& context) {

  ftimestamp = r.beginTime().value();
  tmpTime = ftimestamp >> 32;
  startTime = refTime =  tmpTime;

}

//--------------------------------------------------------
void BeamMonitorBx::beginLuminosityBlock(const LuminosityBlock& lumiSeg,
                     const EventSetup& context) {
  int nthlumi = lumiSeg.luminosityBlock();
  const edm::TimeValue_t fbegintimestamp = lumiSeg.beginTime().value();
  const std::time_t ftmptime = fbegintimestamp >> 32;

  if (countLumi_ == 0) {
    beginLumiOfBSFit_ = nthlumi;
    refBStime[0] = ftmptime;
  }
  if (beginLumiOfBSFit_ == 0) beginLumiOfBSFit_ = nextlumi_;

  if (nthlumi < nextlumi_) return;

  if (nthlumi > nextlumi_) {
    if (countLumi_ != 0 && processed_) {
      FitAndFill(lumiSeg,lastlumi_,nextlumi_,nthlumi);
    }
    nextlumi_ = nthlumi;
    edm::LogInfo("LS|BX|BeamMonitorBx") << "Next Lumi to Fit: " << nextlumi_ << endl;
    if (refBStime[0] == 0) refBStime[0] = ftmptime;
  }
  countLumi_++;
  if (processed_) processed_ = false;
  edm::LogInfo("LS|BX|BeamMonitorBx") << "Begin of Lumi: " << nthlumi << endl;
}

// ----------------------------------------------------------
void BeamMonitorBx::analyze(const Event& iEvent,
                const EventSetup& iSetup ) {
  bool readEvent_ = true;
  const int nthlumi = iEvent.luminosityBlock();
  if (nthlumi < nextlumi_) {
    readEvent_ = false;
    edm::LogWarning("BX|BeamMonitorBx") << "Spilt event from previous lumi section!" << endl;
  }
  if (nthlumi > nextlumi_) {
    readEvent_ = false;
    edm::LogWarning("BX|BeamMonitorBx") << "Spilt event from next lumi section!!!" << endl;
  }

  if (readEvent_) {
    countEvt_++;
    theBeamFitter->readEvent(iEvent);
    processed_ = true;
  }

}


//--------------------------------------------------------
void BeamMonitorBx::endLuminosityBlock(const LuminosityBlock& lumiSeg,
                       const EventSetup& iSetup) {
  int nthlumi = lumiSeg.id().luminosityBlock();
  edm::LogInfo("LS|BX|BeamMonitorBx") << "Lumi of the last event before endLuminosityBlock: " << nthlumi << endl;

  if (nthlumi < nextlumi_) return;
  const edm::TimeValue_t fendtimestamp = lumiSeg.endTime().value();
  const std::time_t fendtime = fendtimestamp >> 32;
  tmpTime = refBStime[1] = fendtime;
}


//--------------------------------------------------------
void BeamMonitorBx::BookTables(int nBx, map<string,string> & vMap, string suffix_) {
  // to rebin histograms when number of bx increases
  dbe_->cd(monitorName_+"FitBx");

  for (std::map<std::string,std::string>::const_iterator varName = vMap.begin();
       varName != vMap.end(); ++varName) {
    string tmpName = varName->first;
    if (!suffix_.empty()) {
      tmpName += "_";
      tmpName += suffix_;
    }
    if (dbe_->get(monitorName_+"FitBx/"+tmpName)) {
      edm::LogInfo("BX|BeamMonitorBx") << "Rebinning " << tmpName << endl;
      dbe_->removeElement(tmpName);
    }

    hs[tmpName]=dbe_->book2D(tmpName,varName->second,3,0,3,nBx,0,nBx);
    hs[tmpName]->setBinLabel(1,"bx",1);
    hs[tmpName]->setBinLabel(2,varName->second,1);
    hs[tmpName]->setBinLabel(3,"#Delta "+varName->second,1);
    for (int i=0;i<nBx;i++) {
      hs[tmpName]->setBinLabel(i+1," ",2);
    }
    hs[tmpName]->getTH1()->SetOption("text");
    hs[tmpName]->Reset();
  }
}

//--------------------------------------------------------
void BeamMonitorBx::BookTrendHistos(bool plotPV,int nBx,map<string,string> & vMap,
                    string subDir_, const TString& prefix_, const TString& suffix_) {
  int nType_ = 2;
  if (plotPV) nType_ = 4;
  std::ostringstream ss;
  std::ostringstream ss1;
  ss << setfill ('0') << setw (5) << nBx;
  ss1 << nBx;

  for (int i = 0; i < nType_; i++) {
    for (std::map<std::string,std::string>::const_iterator varName = vMap.begin();
     varName != vMap.end(); ++varName) {
      string tmpDir_ = subDir_ + "/All_" + varName->first;
      dbe_->cd(monitorName_+tmpDir_);
      TString histTitle(varName->first);
      string tmpName;
      if (prefix_ != "") tmpName = prefix_ + "_" + varName->first;
      if (suffix_ != "") tmpName = tmpName + "_" + suffix_;
      tmpName = tmpName + "_" + ss.str();

      TString histName(tmpName);
      string ytitle(varName->second);
      string xtitle("");
      string options("E1");
      bool createHisto = true;
      switch(i) {
      case 1: // BS vs time
    histName.Insert(histName.Index("_bx_",4),"_time");
    xtitle = "Time [UTC]  [Bx# " + ss1.str() + "]";
    if (ytitle.find("sigma") == string::npos)
      histTitle += " coordinate of beam spot vs time (Fit)";
    else
      histTitle = histTitle.Insert(5," ") + " of beam spot vs time (Fit)";
    break;
      case 2: // PV +/- sigmaPV vs lumi
    if (ytitle.find("sigma") == string::npos) {
      histName.Insert(0,"PV");
      histName.Insert(histName.Index("_bx_",4),"_lumi");
      histTitle.Insert(0,"Avg. ");
      histTitle += " position of primary vtx vs lumi";
      xtitle = "Lumisection  [Bx# " + ss1.str() + "]";
      ytitle.insert(0,"PV");
      ytitle += " #pm #sigma_{PV";
      ytitle += varName->first;
      ytitle += "} (cm)";
    }
    else createHisto = false;
    break;
      case 3: // PV +/- sigmaPV vs time
    if (ytitle.find("sigma") == string::npos) {
      histName.Insert(0,"PV");
      histName.Insert(histName.Index("_bx_",4),"_time");
      histTitle.Insert(0,"Avg. ");
      histTitle += " position of primary vtx vs time";
      xtitle = "Time [UTC]  [Bx# " + ss1.str() + "]";
      ytitle.insert(0,"PV");
      ytitle += " #pm #sigma_{PV";
      ytitle += varName->first;
      ytitle += "} (cm)";
    }
    else createHisto = false;
    break;
      default: // BS vs lumi
    histName.Insert(histName.Index("_bx_",4),"_lumi");
    xtitle = "Lumisection  [Bx# " + ss1.str() + "]";
    if (ytitle.find("sigma") == string::npos)
      histTitle += " coordinate of beam spot vs lumi (Fit)";
    else
      histTitle = histTitle.Insert(5," ") + " of beam spot vs lumi (Fit)";
    break;
      }
      // check if already exist
      if (dbe_->get(monitorName_+tmpDir_+"/"+string(histName))) continue;

      if (createHisto) {
    edm::LogInfo("BX|BeamMonitorBx") << "histName = " << histName << "; histTitle = " << histTitle << std::endl;
    hst[histName] = dbe_->book1D(histName,histTitle,40,0.5,40.5);
    hst[histName]->getTH1()->SetBit(TH1::kCanRebin);
    hst[histName]->setAxisTitle(xtitle,1);
    hst[histName]->setAxisTitle(ytitle,2);
    hst[histName]->getTH1()->SetOption("E1");
    if (histName.Contains("time")) {
      hst[histName]->getTH1()->SetBins(3600,0.5,3600+0.5);
      hst[histName]->setAxisTimeDisplay(1);
      hst[histName]->setAxisTimeFormat("%H:%M:%S",1);
      const char* eventTime = formatFitTime(startTime);
      TDatime da(eventTime);
      if (debug_) {
        edm::LogInfo("BX|BeamMonitorBx") << "TimeOffset = ";
        da.Print();
      }
      hst[histName]->getTH1()->GetXaxis()->SetTimeOffset(da.Convert(kTRUE));
    }
      }
    }//End of variable loop
  }// End of type loop (lumi, time)

  // num of PVs(#Bx) per LS
  dbe_->cd(monitorName_+subDir_ + "/All_nPVs");
  TString histName = "Trending_nPVs_lumi_bx_" + ss.str();
  string xtitle = "Lumisection  [Bx# " + ss1.str() + "]";

  hst[histName] = dbe_->book1D(histName,"Number of Good Reconstructed Vertices",40,0.5,40.5);
  hst[histName]->setAxisTitle(xtitle,1);
  hst[histName]->getTH1()->SetBit(TH1::kCanRebin);
  hst[histName]->getTH1()->SetOption("E1");

}

//--------------------------------------------------------
void BeamMonitorBx::FitAndFill(const LuminosityBlock& lumiSeg,
                   int &lastlumi,int &nextlumi,int &nthlumi){
  if (nthlumi <= nextlumi) return;

  int currentlumi = nextlumi;
  edm::LogInfo("LS|BX|BeamMonitorBx") << "Lumi of the current fit: " << currentlumi << endl;
  lastlumi = currentlumi;
  endLumiOfBSFit_ = currentlumi;

  edm::LogInfo("BX|BeamMonitorBx") << "Time lapsed = " << tmpTime - refTime << std:: endl;

  if (resetHistos_) {
    edm::LogInfo("BX|BeamMonitorBx") << "Resetting Histograms" << endl;
    theBeamFitter->resetCutFlow();
    resetHistos_ = false;
  }

  if (fitNLumi_ > 0)
    if (currentlumi%fitNLumi_!=0) return;

  std::pair<int,int> fitLS = theBeamFitter->getFitLSRange();
  edm::LogInfo("LS|BX|BeamMonitorBx") << " [Fitter] Do BeamSpot Fit for LS = " << fitLS.first
                      << " to " << fitLS.second << endl;
  edm::LogInfo("LS|BX|BeamMonitorBx") << " [BX] Do BeamSpot Fit for LS = " << beginLumiOfBSFit_
                      << " to " << endLumiOfBSFit_ << endl;

  edm::LogInfo("BX|BeamMonitorBx") << " [BxDebugTime] refBStime[0] = " << refBStime[0]
                   << "; address =  " << &refBStime[0] << std::endl;
  edm::LogInfo("BX|BeamMonitorBx") << " [BxDebugTime] refBStime[1] = " << refBStime[1]
                   << "; address =  " << &refBStime[1] << std::endl;

  if (theBeamFitter->runPVandTrkFitter()) {
    countGoodFit_++;
    edm::LogInfo("BX|BeamMonitorBx") << "Number of good fit = " << countGoodFit_ << endl;
    BeamSpotMapBx bsmap = theBeamFitter->getBeamSpotMap();
    std::map<int,int> npvsmap = theBeamFitter->getNPVsperBX();
    edm::LogInfo("BX|BeamMonitorBx") << "Number of bx = " << bsmap.size() << endl;
    if (bsmap.size() == 0) return;
    if (countBx_ < bsmap.size()) {
      countBx_ = bsmap.size();
      BookTables(countBx_,varMap,"");
      BookTables(countBx_,varMap,"all");
      for (BeamSpotMapBx::const_iterator abspot = bsmap.begin();
       abspot!= bsmap.end(); ++abspot) {
    int bx = abspot->first;
    BookTrendHistos(false,bx,varMap1,"FitBx","Trending","bx");
      }
    }

    std::pair<int,int> LSRange = theBeamFitter->getFitLSRange();
    char tmpTitle[50];
    sprintf(tmpTitle,"%s %i %s %i %s"," [cm] (LS: ",LSRange.first," to ",LSRange.second,")");
    for (std::map<std::string,std::string>::const_iterator varName = varMap.begin();
     varName != varMap.end(); ++varName) {
      hs[varName->first]->setTitle(varName->second + " " + tmpTitle);
      hs[varName->first]->Reset();
    }

    if (countGoodFit_ == 1)
      firstlumi_ = LSRange.first;

    if (resetFitNLumi_ > 0 ) {
      char tmpTitle1[50];
      if ( countGoodFit_ > 1)
    sprintf(tmpTitle1,"%s %i %s %i %s"," [cm] (LS: ",firstlumi_," to ",LSRange.second,") [weighted average]");
      else
    sprintf(tmpTitle1,"%s","Need at least two fits to calculate weighted average");
      for (std::map<std::string,std::string>::const_iterator varName = varMap.begin();
       varName != varMap.end(); ++varName) {
    TString tmpName = varName->first + "_all";
    hs[tmpName]->setTitle(varName->second + " " + tmpTitle1);
    hs[tmpName]->Reset();
      }
    }

    int nthBin = countBx_;
    for (BeamSpotMapBx::const_iterator abspot = bsmap.begin();
     abspot!= bsmap.end(); ++abspot,nthBin--) {
      reco::BeamSpot bs = abspot->second;
      int bx = abspot->first;
      int nPVs = npvsmap.find(bx)->second;
      edm::LogInfo("BeamMonitorBx") << "Number of PVs of bx#[" << bx << "] = " << nPVs << endl;
      // Tables
      FillTables(bx,nthBin,varMap,bs,"");
      // Histograms
      FillTrendHistos(bx,nPVs,varMap1,bs,"Trending");
    }
    // Calculate weighted beam spots
    weight(fbspotMap,bsmap);
    // Fill the results
    nthBin = countBx_;
    if (resetFitNLumi_ > 0 && countGoodFit_ > 1) {
      for (BeamSpotMapBx::const_iterator abspot = fbspotMap.begin();
       abspot!= fbspotMap.end(); ++abspot,nthBin--) {
    reco::BeamSpot bs = abspot->second;
    int bx = abspot->first;
    FillTables(bx,nthBin,varMap,bs,"all");
      }
    }
  }
  //   else
  //     edm::LogInfo("BeamMonitorBx") << "Bad Fit!!!" << endl;

  if (resetFitNLumi_ > 0 && currentlumi%resetFitNLumi_ == 0) {
    edm::LogInfo("LS|BX|BeamMonitorBx") << "Reset track collection for beam fit!!!" <<endl;
    resetHistos_ = true;
    theBeamFitter->resetTrkVector();
    theBeamFitter->resetLSRange();
    theBeamFitter->resetRefTime();
    theBeamFitter->resetPVFitter();
    beginLumiOfBSFit_ = 0;
    refBStime[0] = 0;
  }
}

//--------------------------------------------------------
void BeamMonitorBx::FillTables(int nthbx,int nthbin_,
                   map<string,string>&vMap,
                   reco::BeamSpot&bs_, string suffix_){
  map<string,pair<double,double> > val_;
  val_["x0_bx"] = pair<double,double>(bs_.x0(),bs_.x0Error());
  val_["y0_bx"] = pair<double,double>(bs_.y0(),bs_.y0Error());
  val_["z0_bx"] = pair<double,double>(bs_.z0(),bs_.z0Error());
  val_["sigmaX_bx"] = pair<double,double>(bs_.BeamWidthX(),bs_.BeamWidthXError());
  val_["sigmaY_bx"] = pair<double,double>(bs_.BeamWidthY(),bs_.BeamWidthYError());
  val_["sigmaZ_bx"] = pair<double,double>(bs_.sigmaZ(),bs_.sigmaZ0Error());

  for (std::map<std::string,std::string>::const_iterator varName = vMap.begin();
       varName != vMap.end(); ++varName) {
    TString tmpName = varName->first;
    if (suffix_ != "") tmpName += TString("_"+suffix_);
    hs[tmpName]->setBinContent(1,nthbin_,nthbx);
    hs[tmpName]->setBinContent(2,nthbin_,val_[varName->first].first);
    hs[tmpName]->setBinContent(3,nthbin_,val_[varName->first].second);
  }
}

//--------------------------------------------------------
void BeamMonitorBx::FillTrendHistos(int nthBx, int nPVs_, map<string,string> & vMap,
                    reco::BeamSpot & bs_, const TString& prefix_) {
  map<TString,pair<double,double> > val_;
  val_[TString(prefix_+"_x")] = pair<double,double>(bs_.x0(),bs_.x0Error());
  val_[TString(prefix_+"_y")] = pair<double,double>(bs_.y0(),bs_.y0Error());
  val_[TString(prefix_+"_z")] = pair<double,double>(bs_.z0(),bs_.z0Error());
  val_[TString(prefix_+"_sigmaX")] = pair<double,double>(bs_.BeamWidthX(),bs_.BeamWidthXError());
  val_[TString(prefix_+"_sigmaY")] = pair<double,double>(bs_.BeamWidthY(),bs_.BeamWidthYError());
  val_[TString(prefix_+"_sigmaZ")] = pair<double,double>(bs_.sigmaZ(),bs_.sigmaZ0Error());

  std::ostringstream ss;
  ss << setfill ('0') << setw (5) << nthBx;
  int ntbin_ = tmpTime - startTime;
  for (map<TString,MonitorElement*>::iterator itHst = hst.begin();
       itHst != hst.end(); ++itHst) {
    if (!(itHst->first.Contains(ss.str()))) continue;
    if (itHst->first.Contains("nPVs")) continue;
    edm::LogInfo("BX|BeamMonitorBx") << "Filling histogram: " << itHst->first << endl;
    if (itHst->first.Contains("time")) {
      int idx = itHst->first.Index("_time",5);
      itHst->second->setBinContent(ntbin_,val_[itHst->first(0,idx)].first);
      itHst->second->setBinError(ntbin_,val_[itHst->first(0,idx)].second);
    }
    if (itHst->first.Contains("lumi")) {
      int idx = itHst->first.Index("_lumi",5);
      itHst->second->setBinContent(endLumiOfBSFit_,val_[itHst->first(0,idx)].first);
      itHst->second->setBinError(endLumiOfBSFit_,val_[itHst->first(0,idx)].second);
    }
  }
  TString histName = "Trending_nPVs_lumi_bx_" + ss.str();
  if (hst[histName])
    hst[histName]->setBinContent(endLumiOfBSFit_,nPVs_);
}

//--------------------------------------------------------------------------------------------------
void BeamMonitorBx::weight(BeamSpotMapBx& weightedMap_, const BeamSpotMapBx& newMap_){
  for (BeamSpotMapBx::const_iterator it = newMap_.begin();
       it != newMap_.end(); ++it) {
    if (weightedMap_.find(it->first) == weightedMap_.end() || (it->second.type() != 2)) {
      weightedMap_[it->first] = it->second;
      continue;
    }

    BeamSpot obs = weightedMap_[it->first];
    double val_[8] = { obs.x0(),obs.y0(),obs.z0(),obs.sigmaZ(),
               obs.dxdz(),obs.dydz(),obs.BeamWidthX(),obs.BeamWidthY()};
    double valErr_[8] = { obs.x0Error(),obs.y0Error(),obs.z0Error(),
              obs.sigmaZ0Error(),obs.dxdzError(),obs.dydzError(),
              obs.BeamWidthXError(),obs.BeamWidthYError()};

    reco::BeamSpot::BeamType type = reco::BeamSpot::Unknown;
    weight(val_[0], valErr_[0], it->second.x0()        , it->second.x0Error());
    weight(val_[1], valErr_[1], it->second.y0()        , it->second.y0Error());
    weight(val_[2], valErr_[2], it->second.z0()        , it->second.z0Error());
    weight(val_[3], valErr_[3], it->second.sigmaZ()    , it->second.sigmaZ0Error());
    weight(val_[4], valErr_[4], it->second.dxdz()      , it->second.dxdzError());
    weight(val_[5], valErr_[5], it->second.dydz()      , it->second.dydzError());
    weight(val_[6], valErr_[6], it->second.BeamWidthX(), it->second.BeamWidthXError());
    weight(val_[7], valErr_[7], it->second.BeamWidthY(), it->second.BeamWidthYError());
    if(it->second.type() == reco::BeamSpot::Tracker){
      type = reco::BeamSpot::Tracker;
    }

    reco::BeamSpot::Point bsPosition(val_[0],val_[1],val_[2]);
    reco::BeamSpot::CovarianceMatrix error;
    for (int i=0;i<7;++i) {
      error(i,i) = valErr_[i]*valErr_[i];
    }
    reco::BeamSpot weightedBeamSpot(bsPosition,val_[3],val_[4],val_[5],val_[6],error,type);
    weightedBeamSpot.setBeamWidthY(val_[7]);
    LogInfo("BX|BeamMonitorBx")
      << weightedBeamSpot
      << endl;
    weightedMap_.erase(it->first);
    weightedMap_[it->first] = weightedBeamSpot;
  }
}

//--------------------------------------------------------------------------------------------------
void BeamMonitorBx::weight(double& mean,double& meanError,const double& val,const double& valError){
    double tmpError = 0;
    if (meanError < 1e-8){
    tmpError = 1/(valError*valError);
    mean = val*tmpError;
    }
    else{
    tmpError = 1/(meanError*meanError) + 1/(valError*valError);
    mean = mean/(meanError*meanError) + val/(valError*valError);
    }
    mean = mean/tmpError;
    meanError = std::sqrt(1/tmpError);
}

//--------------------------------------------------------
void BeamMonitorBx::endRun(const Run& r, const EventSetup& context){

}

//--------------------------------------------------------
void BeamMonitorBx::endJob(const LuminosityBlock& lumiSeg,
               const EventSetup& iSetup){
}

DEFINE_FWK_MODULE(BeamMonitorBx);