| # Gaudi Framework, version v22r4 |

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Public Member Functions | Static Public Member Functions | Protected Attributes

# Gaudi::Histogram2D Class Reference

AIDA implementation for 2 D histograms using ROOT THD2. More...

`#include <H2D.h>`

Inheritance diagram for Gaudi::Histogram2D:
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Collaboration diagram for Gaudi::Histogram2D:
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List of all members.

## Public Member Functions
| Histogram2D ()
| Standard Constructor.
| Histogram2D (TH2D *rep)
| Standard initializing Constructor with TH2D representation to be adopted.
virtual | ~Histogram2D ()
| Destructor.
bool | fill (double x, double y, double weight=1.)
| Fill the Histogram2D with a value and the.
virtual bool | setBinContents (int binIndexX, int binIndexY, int entries, double height, double error, double centreX, double centreY)
| Fast filling method for a given bin. It can be also the over/underflow bin.
bool | setRms (double rmsX, double rmsY)
| Sets the rms of the histogram.
bool | reset ()
void | copyFromAida (const IHistogram2D &h)
| Create new histogram from any AIDA based histogram.
virtual const CLID & | clID () const
| Retrieve reference to class defininition identifier.
## Static Public Member Functions
static const CLID & | classID ()
| Retrieve reference to class definition structure (static access)
## Protected Attributes
double | m_sumwx
double | m_sumwy

## Detailed Description

AIDA implementation for 2 D histograms using ROOT THD2.

Author:
  M.Frank

Definition at line 20 of file H2D.h.

## Constructor & Destructor Documentation

Gaudi::Histogram2D::Histogram2D | ( | ) |

Standard Constructor.

Definition at line 121 of file H2D.cpp.

                                  {
      m_rep = new TH2D();
      m_rep->Sumw2();
      m_sumEntries = 0;
      m_sumwx = m_sumwy = 0;
      setTitle("");
      m_rep->SetDirectory(0);
    }

Gaudi::Histogram2D::Histogram2D | ( | TH2D * | rep ) |

Standard initializing Constructor with TH2D representation to be adopted.

Definition at line 130 of file H2D.cpp.

                                            {
      m_rep = 0;
      adoptRepresentation(rep);
      m_sumEntries = 0;
      m_sumwx = m_sumwy = 0;
      m_rep->SetDirectory(0);
    }

virtual Gaudi::Histogram2D::~Histogram2D | ( | ) | `[inline, virtual]`

Destructor.

Definition at line 27 of file H2D.h.

    {}

## Member Function Documentation

static const CLID& Gaudi::Histogram2D::classID | ( | ) | `[inline, static]`

Retrieve reference to class definition structure (static access)

Retrieve Pointer to class definition structure.

Reimplemented from DataObject.

Definition at line 42 of file H2D.h.

    { return CLID_H2D; }

virtual const CLID& Gaudi::Histogram2D::clID | ( | ) | const`[inline, virtual]`

Retrieve reference to class defininition identifier.

Reimplemented from DataObject.

Definition at line 41 of file H2D.h.

    { return classID(); }

void Gaudi::Histogram2D::copyFromAida | ( | const IHistogram2D & | h ) |

Create new histogram from any AIDA based histogram.

Definition at line 187 of file H2D.cpp.

                                                             {
      // implement here the copy
      delete m_rep;
      const char* tit = h.title().c_str();
      if (h.xAxis().isFixedBinning() && h.yAxis().isFixedBinning()  )
        m_rep = new TH2D(tit,tit,
                         h.xAxis().bins(),h.xAxis().lowerEdge(),h.xAxis().upperEdge(),
                         h.yAxis().bins(),h.yAxis().lowerEdge(),h.yAxis().upperEdge() );
      else {
        Edges eX, eY;
        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() );
        m_rep = new TH2D(tit,tit,eX.size()-1,&eX.front(),eY.size()-1,&eY.front());
      }
      m_xAxis.initialize(m_rep->GetXaxis(),true);
      m_yAxis.initialize(m_rep->GetYaxis(),true);
      m_rep->Sumw2();
      m_sumEntries = 0;
      m_sumwx = 0;
      m_sumwy = 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 sumwxy = 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) {
          // root binning starts from one !
          m_rep->SetBinContent(rIndexX(i), rIndexY(j), h.binHeight(i,j) );
          m_rep->SetBinError(rIndexX(i), rIndexY(j), h.binError(i,j) );
          // calculate statistics
          if ( i >= 0 && j >= 0) {
            sumwxy += h.binHeight(i,j)*h.binMeanX(i,j)*h.binMeanY(i,j);
          }
        }
      }
      // 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;
      m_rep->PutStats(&stat.front());
    }

bool Gaudi::Histogram2D::fill | ( | double | x,
|  | double | y,
|  | double | weight = `1.`
| ) |  |

Fill the Histogram2D with a value and the.

Definition at line 162 of file H2D.cpp.

                                                                 {
      (weight==1.) ? m_rep->Fill(x,y) : m_rep->Fill(x,y,weight );
      return true;
    }

bool Gaudi::Histogram2D::reset | ( | ) |

Reimplemented from Gaudi::Generic2D< INTERFACE, IMPLEMENTATION >.

Definition at line 150 of file H2D.cpp.

                                  {
      m_sumwx = 0;
      m_sumwy = 0;
      return Base::reset();
    }

bool Gaudi::Histogram2D::setBinContents | ( | int | binIndexX,
|  | int | binIndexY,
|  | int | entries,
|  | double | height,
|  | double | error,
|  | double | centreX,
|  | double | centreY
| ) |  | `[virtual]`

Fast filling method for a given bin. It can be also the over/underflow bin.

Definition at line 138 of file H2D.cpp.

                                                                                                                           {
      m_rep->SetBinContent(rIndexX(i), rIndexY(j), height);
      m_rep->SetBinError(rIndexX(i), rIndexY(j), error);
      // accumulate sumwx for in range bins
      if (i >=0 && j >= 0) {
        m_sumwx += centreX*height;
        m_sumwy += centreY*height;
      }
      m_sumEntries += entries;
      return true;
    }

bool Gaudi::Histogram2D::setRms | ( | double | rmsX,
|  | double | rmsY
| ) |  |

Sets the rms of the histogram.

Definition at line 167 of file H2D.cpp.

                                                         {
      m_rep->SetEntries(m_sumEntries);
      std::vector<double> stat(11);
      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;
      m_rep->PutStats(&stat.front());
      return true;
    }

## Member Data Documentation

double Gaudi::Histogram2D::m_sumwx`[protected]`

Definition at line 45 of file H2D.h.

double Gaudi::Histogram2D::m_sumwy`[protected]`

Definition at line 46 of file H2D.h.

The documentation for this class was generated from the following files:

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r4/GaudiSvc/src/HistogramSvc/H2D.h
- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r4/GaudiSvc/src/HistogramSvc/H2D.cpp

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