H3D.cpp

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#include "GaudiKernel/DataObject.h"
#include "GaudiKernel/ObjectFactory.h"
#include "GaudiPI.h"
#include "Generic3D.h"
#include "TH3D.h"

namespace Gaudi {

  class  Histogram3D : public DataObject, public Generic3D<AIDA::IHistogram3D,TH3D>   { 
  public:
    Histogram3D();
    Histogram3D(TH3D* rep);
    virtual ~Histogram3D() {}
    bool fill ( double x, double y, double z, double weight);
    virtual bool setBinContents( int i, int j, int k, int entries,double height,double error,double centreX, double centreY, double centreZ );
    virtual bool setRms(double rmsX, double rmsY, double rmsZ);
    // overwrite reset
    virtual bool reset(); 
    void* cast(const std::string & className) const;
    void  copyFromAida(const AIDA::IHistogram3D & h);
    virtual const CLID& clID() const { return Gaudi::Histogram3D::classID(); }
    static const CLID& classID()     { return CLID_H3D; }

  protected: 
    // cache sumwx and sumwy  when setting contents since I don't have bin mean 
    double m_sumwx;
    double m_sumwy;
    double m_sumwz;
  };
}
typedef Gaudi::Histogram3D H3D;
DECLARE_DATAOBJECT_FACTORY(H3D)

namespace Gaudi {
  template <> 
  void Generic3D<AIDA::IHistogram3D,TH3D>::adoptRepresentation(TObject* rep)  {
    TH3D* imp = dynamic_cast<TH3D*>(rep);
    if ( imp )  {
      if ( m_rep ) delete m_rep;
      m_rep = imp;
      m_xAxis.initialize(m_rep->GetXaxis(),true);
      m_yAxis.initialize(m_rep->GetYaxis(),true);
      m_zAxis.initialize(m_rep->GetZaxis(),true);
      const TArrayD* a = m_rep->GetSumw2();
      if ( 0 == a || (a && a->GetSize()==0) ) m_rep->Sumw2();
      setTitle(m_rep->GetTitle());
      return;
    }
    throw std::runtime_error("Cannot adopt native histogram representation.");
  }
}

std::pair<DataObject*,AIDA::IHistogram3D*>
Gaudi::createH3D(const std::string& title,int nBinsX,double xlow,double xup,int nBinsY,double ylow,double yup,int nBinsZ,double zlow,double zup) {
  Histogram3D* p = new Histogram3D(new TH3D(title.c_str(),title.c_str(),nBinsX,xlow,xup,nBinsY,ylow,yup,nBinsZ,zlow,zup));
  return std::pair<DataObject*,AIDA::IHistogram3D*>(p,p);
}

std::pair<DataObject*,AIDA::IHistogram3D*>
Gaudi::createH3D(const std::string& title, const Edges& eX,const Edges& eY,const Edges& eZ) {
  Histogram3D* p = new Histogram3D(new TH3D(title.c_str(),title.c_str(),eX.size()-1,&eX.front(), eY.size()-1,&eY.front(), eZ.size()-1,&eZ.front()));
  return std::pair<DataObject*,AIDA::IHistogram3D*>(p,p);
}

std::pair<DataObject*,AIDA::IHistogram3D*> Gaudi::createH3D(const AIDA::IHistogram3D& hist)  {
  TH3D *h = getRepresentation<AIDA::IHistogram3D,TH3D>(hist);
  Histogram3D *n = h ? new Histogram3D(new TH3D(*h)) : 0;
  return std::pair<DataObject*,AIDA::IHistogram3D*>(n,n);
}

Gaudi::Histogram3D::Histogram3D() {
  m_rep = new TH3D();
  setTitle("");
  m_rep->Sumw2();
  m_sumEntries = 0;
  m_sumwx = 0;
  m_sumwy = 0;
  m_sumwz = 0;
  m_rep->SetDirectory(0);
}

Gaudi::Histogram3D::Histogram3D(TH3D* rep) {
  m_rep = 0;
  adoptRepresentation(rep);
  m_sumEntries = 0;
  m_sumwx = 0;
  m_sumwy = 0;
  m_sumwz = 0;
  m_rep->SetDirectory(0);
}

// set bin content (entries and centre are not used ) 
bool Gaudi::Histogram3D::setBinContents(int i,int j,int k,int entries,double height,double error,double centreX, double centreY, double centreZ ) { 
  m_rep->SetBinContent(rIndexX(i), rIndexY(j), rIndexZ(k), height); 
  m_rep->SetBinError(rIndexX(i), rIndexY(j), rIndexZ(k), error); 
  // accumulate sum bin centers
  if (i >=0 && j >= 0 && k >= 0) { 
    m_sumwx += centreX*height; 
    m_sumwy += centreY*height; 
    m_sumwz += centreZ*height; 
  }
  m_sumEntries += entries;
  return true;
}
    
bool Gaudi::Histogram3D::setRms(double rmsX, double rmsY, double rmsZ   ) { 
  m_rep->SetEntries(m_sumEntries); 
  std::vector<double> stat(11); 
  // sum weights 
  stat[0] =  sumBinHeights();  
  stat[1] = 0; 
  if (equivalentBinEntries() != 0) 
    stat[1] = (  sumBinHeights() * sumBinHeights() ) / equivalentBinEntries();
  stat[2] = m_sumwx;
  double meanX = 0; 
  if ( sumBinHeights() != 0 ) meanX =  m_sumwx/ sumBinHeights(); 
  stat[3] = ( meanX*meanX + rmsX*rmsX )* sumBinHeights(); 
  stat[4] = m_sumwy;
  double meanY = 0; 
  if ( sumBinHeights() != 0 ) meanY =  m_sumwy/ sumBinHeights(); 
  stat[5] = ( meanY*meanY + rmsY*rmsY )* sumBinHeights(); 
  stat[6] = 0; 
  stat[7] = m_sumwz;
  double meanZ = 0; 
  if ( sumBinHeights() != 0 ) meanZ =  m_sumwz/ sumBinHeights(); 
  stat[8] = ( meanZ*meanZ + rmsZ*rmsZ )* sumBinHeights(); 
  // do not need to use sumwxy sumwxz and sumwyz

  m_rep->PutStats(&stat.front()); 
  return true; 
}

bool Gaudi::Histogram3D::reset (  )   { 
  m_sumwx = 0;
  m_sumwy = 0;
  m_sumwz = 0;
  m_sumEntries = 0; 
  m_rep->Reset ( ); 
  return true; 
}

bool Gaudi::Histogram3D::fill ( double x, double y, double z, double weight)  { 
  m_rep->Fill ( x , y, z, weight ); 
  return true;
}

void* Gaudi::Histogram3D::cast(const std::string & className) const   {  
  if (className == "AIDA::IHistogram3D")   {
    return (AIDA::IHistogram3D*)this; 
  }
  else if (className == "AIDA::IHistogram")   {
    return (AIDA::IHistogram*)this; 
  }
  return 0;
}

void Gaudi::Histogram3D::copyFromAida(const AIDA::IHistogram3D & h) { 
  delete m_rep;
  // implement here the copy
  const char* tit = h.title().c_str();
  if (h.xAxis().isFixedBinning() && h.yAxis().isFixedBinning() &&  h.zAxis().isFixedBinning() )  {
    m_rep = new TH3D(tit,tit,
      h.xAxis().bins(), h.xAxis().lowerEdge(), h.xAxis().upperEdge(), 
      h.yAxis().bins(), h.yAxis().lowerEdge(), h.yAxis().upperEdge(), 
      h.zAxis().bins(), h.zAxis().lowerEdge(), h.zAxis().upperEdge() ); 
  }
  else { 
    Edges eX, eY, eZ;
    for (int i =0; i < h.xAxis().bins(); ++i) 
      eX.push_back(h.xAxis().binLowerEdge(i)); 
    // add also upperedges at the end
    eX.push_back(h.xAxis().upperEdge() ); 
    for (int i =0; i < h.yAxis().bins(); ++i) 
      eY.push_back(h.yAxis().binLowerEdge(i)); 
    // add also upperedges at the end
    eY.push_back(h.yAxis().upperEdge() ); 
    for (int i =0; i < h.zAxis().bins(); ++i) 
      eZ.push_back(h.zAxis().binLowerEdge(i)); 
    // add also upperedges at the end
    eZ.push_back(h.zAxis().upperEdge() ); 
    m_rep = new TH3D(tit,tit,eX.size()-1,&eX.front(),eY.size()-1,&eY.front(),eZ.size()-1,&eZ.front());
  }
  m_xAxis.initialize(m_rep->GetXaxis(),true);
  m_yAxis.initialize(m_rep->GetYaxis(),true);
  m_zAxis.initialize(m_rep->GetZaxis(),true);
  const TArrayD* a = m_rep->GetSumw2();
  if ( 0 == a || (a && a->GetSize()==0) ) m_rep->Sumw2();
  m_sumEntries = 0;
  m_sumwx = 0;
  m_sumwy = 0;
  m_sumwz = 0;

  // statistics
  double sumw   = h.sumBinHeights();    
  double sumw2  = 0; 
  if (h.equivalentBinEntries() != 0) 
    sumw2 = ( sumw * sumw ) /h.equivalentBinEntries();
  double sumwx  = h.meanX()*h.sumBinHeights(); 
  double sumwx2 = (h.meanX()*h.meanX() + h.rmsX()*h.rmsX() )*h.sumBinHeights();
  double sumwy  = h.meanY()*h.sumBinHeights(); 
  double sumwy2 = (h.meanY()*h.meanY() + h.rmsY()*h.rmsY() )*h.sumBinHeights();
  double sumwz  = h.meanZ()*h.sumBinHeights(); 
  double sumwz2 = (h.meanZ()*h.meanZ() + h.rmsZ()*h.rmsZ() )*h.sumBinHeights();
  double sumwxy = 0; 
  double sumwxz = 0; 
  double sumwyz = 0; 

  // copy the contents in  (AIDA underflow/overflow are -2,-1)
  for (int i=-2; i < xAxis().bins(); ++i) { 
    for (int j=-2; j < yAxis().bins(); ++j) { 
      for (int k=-2; k < zAxis().bins(); ++k) { 
        m_rep->SetBinContent(rIndexX(i), rIndexY(j), rIndexZ(k), h.binHeight(i,j,k) ); 
        m_rep->SetBinError(rIndexX(i), rIndexY(j), rIndexZ(k), h.binError(i,j,k) );     
        // calculate statistics 
        if ( i >= 0 && j >= 0 && k >= 0) { 
          sumwxy += h.binHeight(i,j,k)*h.binMeanX(i,j,k)*h.binMeanY(i,j,k); 
          sumwxz += h.binHeight(i,j,k)*h.binMeanX(i,j,k)*h.binMeanZ(i,j,k); 
          sumwyz += h.binHeight(i,j,k)*h.binMeanY(i,j,k)*h.binMeanZ(i,j,k); 
        }
      }
    }
  }
  // need to do set entries after setting contents otherwise root will recalulate them 
  // taking into account how many time  SetBinContents() has been called 
  m_rep->SetEntries(h.allEntries()); 

  // fill stat vector  
  std::vector<double> stat(11); 
  stat[0] = sumw; 
  stat[1] = sumw2; 
  stat[2] = sumwx; 
  stat[3] = sumwx2; 
  stat[4] = sumwy; 
  stat[5] = sumwy2; 
  stat[6] = sumwxy; 
  stat[7] = sumwz; 
  stat[8] = sumwz2; 
  stat[9] = sumwxz; 
  stat[10] = sumwyz; 
  m_rep->PutStats(&stat.front()); 
}