| # Gaudi Framework, version v22r2 |

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Public Member Functions | Static Public Member Functions | Protected Attributes | Private Member Functions

# Gaudi::Histogram1D Class Reference

AIDA implementation for 1 D histograms using ROOT THD1. More...

`#include <H1D.h>`

Inheritance diagram for Gaudi::Histogram1D:
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Collaboration diagram for Gaudi::Histogram1D:
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List of all members.

## Public Member Functions
| Histogram1D ()
| Standard constructor.
| Histogram1D (TH1D *rep)
| Standard constructor with initialization. The histogram representation will be adopted.
virtual | ~Histogram1D ()
| Destructor.
virtual void | adoptRepresentation (TObject *rep)
| Adopt ROOT histogram representation.
virtual bool | setBinContents (int i, int entries, double height, double error, double centre)
| set bin content (entries and centre are not used )
virtual bool | reset ()
| need to overwrite reset to reset the sums
virtual bool | setStatistics (int allEntries, double eqBinEntries, double mean, double rms)
| set histogram statistics
virtual bool | fill (double x, double weight)
| Fill the Profile1D with a value and the corresponding weight.
bool | setRms (double rms)
| Update histogram RMS.
void | copyFromAida (const AIDA::IHistogram1D &h)
| Create new histogram from any AIDA based histogram.
virtual const CLID & | clID () const
| Retrieve reference to class defininition identifier.
StreamBuffer & | serialize (StreamBuffer &s)
| Serialization mechanism, Serialize the object for reading.
StreamBuffer & | serialize (StreamBuffer &s) const
| Serialization mechanism, Serialize the object for writing.
## Static Public Member Functions
static const CLID & | classID ()
| Retrieve reference to class definition structure (static access)
## Protected Attributes
double | m_sumwx
| cache sumwx when setting contents since I don't have bin mean
## Private Member Functions
void | init (const std::string &title, bool initialize_axis=true)
void | initSums ()

## Detailed Description

AIDA implementation for 1 D histograms using ROOT THD1.

Author:
  M.Frank

Definition at line 17 of file H1D.h.

## Constructor & Destructor Documentation

Gaudi::Histogram1D::Histogram1D | ( | ) |

Standard constructor.

Definition at line 60 of file H1D.cpp.

                                   {
      m_rep = new TH1D();
      init("",false);
    }

Gaudi::Histogram1D::Histogram1D | ( | TH1D * | rep ) |

Standard constructor with initialization. The histogram representation will be adopted.

Definition at line 65 of file H1D.cpp.

                                            {
      m_rep = rep;
      init(m_rep->GetTitle());
      initSums();
    }

virtual Gaudi::Histogram1D::~Histogram1D | ( | ) | `[inline, virtual]`

Destructor.

Definition at line 30 of file H1D.h.

    {}

## Member Function Documentation

void Gaudi::Histogram1D::adoptRepresentation | ( | TObject * | rep ) | `[virtual]`

Adopt ROOT histogram representation.

Reimplemented from Gaudi::Generic1D< INTERFACE, IMPLEMENTATION >.

Definition at line 100 of file H1D.cpp.

                                                            {
      Gaudi::Generic1D<AIDA::IHistogram1D,TH1D>::adoptRepresentation(rep);
      if ( m_rep )  {
        init(m_rep->GetTitle());
        initSums();
      }
    }

static const CLID& Gaudi::Histogram1D::classID | ( | ) | `[inline, static]`

Retrieve reference to class definition structure (static access)

Retrieve Pointer to class definition structure.

Reimplemented from DataObject.

Definition at line 47 of file H1D.h.

    { return CLID_H1D; }

virtual const CLID& Gaudi::Histogram1D::clID | ( | ) | const`[inline, virtual]`

Retrieve reference to class defininition identifier.

Reimplemented from DataObject.

Definition at line 46 of file H1D.h.

    { return Gaudi::Histogram1D::classID(); }

void Gaudi::Histogram1D::copyFromAida | ( | const AIDA::IHistogram1D & | h ) |

Create new histogram from any AIDA based histogram.

Definition at line 164 of file H1D.cpp.

                                                                  {
     // implement here the copy
      std::string tit = h.title()+"Copy";
      delete m_rep;
      if (h.axis().isFixedBinning() )  {
        m_rep = new TH1D(tit.c_str(),tit.c_str(),h.axis().bins(),h.axis().lowerEdge(),h.axis().upperEdge());
      }
      else {
        Edges e;
        for (int i =0; i < h.axis().bins(); ++i)  {
          e.push_back(h.axis().binLowerEdge(i));
        }
        // add also upperedges at the end
        e.push_back(h.axis().upperEdge() );
        m_rep = new TH1D(tit.c_str(),tit.c_str(),e.size()-1,&e.front());
      }
      m_axis.initialize(m_rep->GetXaxis(),false);
      m_rep->Sumw2();
      m_sumEntries = 0;
      m_sumwx = 0;
      // sumw
      double sumw = h.sumBinHeights();
      // sumw2
      double sumw2 = 0;
      if (h.equivalentBinEntries() != 0)
        sumw2 = ( sumw * sumw ) /h.equivalentBinEntries();

      double sumwx = h.mean()*h.sumBinHeights();
      double sumwx2 = (h.mean()*h.mean() + h.rms()*h.rms() )*h.sumBinHeights();

      // copy the contents in
      for (int i=-2; i < axis().bins(); ++i) {
        // root binning starts from one !
        m_rep->SetBinContent(rIndex(i),h.binHeight(i) );
        m_rep->SetBinError(rIndex(i),h.binError(i) );
      }
      // 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());
        // stat vector
      std::vector<double> stat(11);
      stat[0] = sumw;
      stat[1] = sumw2;
      stat[2] = sumwx;
      stat[3] = sumwx2;
      m_rep->PutStats(&stat.front());
    }

bool Gaudi::Histogram1D::fill | ( | double | x,
|  | double | weight
| ) |  | `[virtual]`

Fill the Profile1D with a value and the corresponding weight.

Definition at line 159 of file H1D.cpp.

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

void Gaudi::Histogram1D::init | ( | const std::string & | title,
|  | bool | initialize_axis = `true`
| ) |  | `[private]`

Definition at line 71 of file H1D.cpp.

                                                                             {
      m_classType = "IHistogram1D";
      if ( initialize_axis )  {
        m_axis.initialize(m_rep->GetXaxis(),false);
      }
      const TArrayD* a = m_rep->GetSumw2();
      if ( 0 == a || (a && a->GetSize()==0) ) m_rep->Sumw2();
      setTitle(title);
      m_rep->SetDirectory(0);
      m_sumEntries = 0;
      m_sumwx = 0;
    }

void Gaudi::Histogram1D::initSums | ( | ) | `[private]`

Definition at line 84 of file H1D.cpp.

                                     {
      m_sumwx = 0;
      m_sumEntries = 0;
      for(int i=1, n=m_rep->GetNbinsX(); i<=n; ++i)    {
        m_sumwx += m_rep->GetBinContent(i)*m_rep->GetBinCenter(i);
        m_sumEntries += (int)m_rep->GetBinContent(i);
      }
    }

bool Gaudi::Histogram1D::reset | ( | ) | `[virtual]`

need to overwrite reset to reset the sums

Reimplemented from Gaudi::Generic1D< INTERFACE, IMPLEMENTATION >.

Definition at line 93 of file H1D.cpp.

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

StreamBuffer & Gaudi::Histogram1D::serialize | ( | StreamBuffer & | s ) | const

Serialization mechanism, Serialize the object for writing.

Parameters:

  s | the StreamBuffer where to write the data

Returns:
  the resulting StreamBuffer, after wrinting

Definition at line 264 of file H1D.cpp.

                                                                   {
      //DataObject::serialize(s);
      s << static_cast<int>( annotation().size() );
      for (int i = 0; i < annotation().size(); i++) {
        s << annotation().key(i);
        s << annotation().value(i);
      }
      const AIDA::IAxis & axis( this->axis() );
      const int isFixedBinning = axis.isFixedBinning();
      const int bins = axis.bins();
      s << isFixedBinning << bins;
      if ( isFixedBinning ) {
        s << axis.lowerEdge();
      }
      else {
        for ( int i = 0; i < bins; ++i )
          s << axis.binLowerEdge(i);
      }
      s << axis.upperEdge();
      for ( int i = 0; i <= bins + 1; ++i )
        s << m_rep->GetBinContent(i) << m_rep->GetBinError( i );

      s << m_rep->GetEntries();
      Stat_t stats[4];  // stats array
      m_rep->GetStats( stats );
      s << stats[0] << stats[1] << stats[2] << stats[3];
      return s;
    }

StreamBuffer & Gaudi::Histogram1D::serialize | ( | StreamBuffer & | s ) |

Serialization mechanism, Serialize the object for reading.

Parameters:

  s | the StreamBuffer containing the data to be read

Returns:
  the resulting StreamBuffer, after reading

Definition at line 217 of file H1D.cpp.

                                                             {
      //DataObject::serialize(s);
      std::string title;
      int size;
      s >> size;
      for (int j = 0; j < size; j++) {
        std::string key, value;
        s >> key >> value;
        annotation().addItem (key, value);
        if ("Title" == key) {
          title = value;
        }
      }
      double lowerEdge, upperEdge, binHeight, binError;
      int    isFixedBinning, bins;
      s >> isFixedBinning >> bins;

      if ( m_rep ) delete m_rep;
      if ( isFixedBinning ) {
        s >> lowerEdge >> upperEdge;
        m_rep = new TH1D(title.c_str(),title.c_str(),bins,lowerEdge,upperEdge);
      } else {
        Edges edges;
        edges.resize(bins);
        for ( int i = 0; i <= bins; ++i )
          s >> *(double*)&edges[i];
        m_rep = new TH1D(title.c_str(),title.c_str(),edges.size()-1,&edges.front());
      }
      m_axis.initialize(m_rep->GetXaxis(),true);
      m_rep->Sumw2();
      m_sumEntries = 0;
      m_sumwx = 0;

      for ( int i = 0; i <= bins + 1; ++i ) {
        s >> binHeight >> binError;
        m_rep->SetBinContent( i, binHeight );
        m_rep->SetBinError( i, binError );
      }
      Stat_t allEntries;
      s >> allEntries;
      m_rep->SetEntries( allEntries );
      Stat_t stats[4];                                    // stats array
      s >> stats[0] >> stats[1] >> stats[2] >> stats[3];
      m_rep->PutStats( stats );
      return s;
    }

bool Gaudi::Histogram1D::setBinContents | ( | int | i,
|  | int | entries,
|  | double | height,
|  | double | error,
|  | double | centre
| ) |  | `[virtual]`

set bin content (entries and centre are not used )

Definition at line 108 of file H1D.cpp.

                                                                                                     {
      m_rep->SetBinContent(rIndex(i),height);
      m_rep->SetBinError(rIndex(i),error);
      // accumulate sumwx for in range bins
      if (i != AIDA::IAxis::UNDERFLOW_BIN && i !=  AIDA::IAxis::OVERFLOW_BIN )
        m_sumwx  += centre*height;
      m_sumEntries += entries;
      return true;
    }

bool Gaudi::Histogram1D::setRms | ( | double | rms ) |

Update histogram RMS.

Definition at line 124 of file H1D.cpp.

                                            {
      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 mean = 0;
      if ( sumBinHeights() != 0 ) mean =  m_sumwx/ sumBinHeights();
      stat[3] = ( mean*mean + rms*rms )* sumBinHeights();
      m_rep->PutStats(&stat.front());
      return true;
    }

bool Gaudi::Histogram1D::setStatistics | ( | int | allEntries,
|  | double | eqBinEntries,
|  | double | mean,
|  | double | rms
| ) |  | `[virtual]`

set histogram statistics

Definition at line 141 of file H1D.cpp.

                                                                                                  {
      m_rep->SetEntries(allEntries);
      // fill statistcal vector for Root
      std::vector<double> stat(11);
      // sum weights
      stat[0] =  sumBinHeights();
      // sum weights **2
      stat[1] = 0;
      if (eqBinEntries != 0)
        stat[1] = (  sumBinHeights() * sumBinHeights() ) / eqBinEntries;
      // sum weights * x
      stat[2] = mean*sumBinHeights();
      // sum weight * x **2
      stat[3] = ( mean*mean + rms*rms )* sumBinHeights();
      m_rep->PutStats(&stat.front());
      return true;
    }

## Member Data Documentation

double Gaudi::Histogram1D::m_sumwx`[protected]`

cache sumwx when setting contents since I don't have bin mean

Definition at line 23 of file H1D.h.

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

- /afs/.cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r2/GaudiSvc/src/HistogramSvc/H1D.h
- /afs/.cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r2/GaudiSvc/src/HistogramSvc/H1D.cpp

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