library: libHist #include "TH2.h"

# TH2I

class description - source file - inheritance tree (.pdf)

## class TH2I : public TH2, public TArrayI

| Inheritance Chart:

`TObject`

<-

`TNamed`

`TAttLine`

`TAttFill`

`TAttMarker`

<-

`TH1`

<-

`TH2`

`TArray`

<-

`TArrayI`

<-

`TH2I`

        public:

                          TH2I()
                          TH2I(const char* name, const char* title, Int_t nbinsx, Axis_t xlow, Axis_t xup, Int_t nbinsy, Axis_t ylow, Axis_t yup)
                          TH2I(const char* name, const char* title, Int_t nbinsx, const Double_t* xbins, Int_t nbinsy, Axis_t ylow, Axis_t yup)
                          TH2I(const char* name, const char* title, Int_t nbinsx, Axis_t xlow, Axis_t xup, Int_t nbinsy, const Double_t* ybins)
                          TH2I(const char* name, const char* title, Int_t nbinsx, const Double_t* xbins, Int_t nbinsy, const Double_t* ybins)
                          TH2I(const char* name, const char* title, Int_t nbinsx, const Float_t* xbins, Int_t nbinsy, const Float_t* ybins)
                          TH2I(const TH2I& h2i)
                  virtual ~TH2I()
             virtual void AddBinContent(Int_t bin)
             virtual void AddBinContent(Int_t bin, Stat_t w)
           static TClass* Class()
             virtual void Copy(TObject& hnew) const
             virtual TH1* DrawCopy(Option_t* option = "") const
           virtual Stat_t GetBinContent(Int_t bin) const
           virtual Stat_t GetBinContent(Int_t binx, Int_t biny) const
           virtual Stat_t GetBinContent(Int_t binx, Int_t biny, Int_t) const
          virtual TClass* IsA() const
                    TH2I& operator=(const TH2I& h1)
             virtual void Reset(Option_t* option = "")
             virtual void SetBinContent(Int_t bin, Stat_t content)
             virtual void SetBinContent(Int_t binx, Int_t biny, Stat_t content)
             virtual void SetBinContent(Int_t binx, Int_t biny, Int_t, Stat_t content)
             virtual void SetBinsLength(Int_t n = -1)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

### Data Members

## Class Description

     Service class for 2-Dim histogram classes

      TH2C a 2-D histogram with one byte per cell (char)
      TH2S a 2-D histogram with two bytes per cell (short integer)
      TH2I a 2-D histogram with four bytes per cell (32 bits integer)
      TH2F a 2-D histogram with four bytes per cell (float)
      TH2D a 2-D histogram with eight bytes per cell (double)

TH2I(): TH2()

~TH2I()

TH2I(const char *name,const char *title,Int_t nbinsx,Axis_t xlow,Axis_t xup ,Int_t nbinsy,Axis_t ylow,Axis_t yup) :TH2(name,title,nbinsx,xlow,xup,nbinsy,ylow,yup)

TH2I(const char *name,const char *title,Int_t nbinsx,const Double_t *xbins ,Int_t nbinsy,Axis_t ylow,Axis_t yup) :TH2(name,title,nbinsx,xbins,nbinsy,ylow,yup)

TH2I(const char *name,const char *title,Int_t nbinsx,Axis_t xlow,Axis_t xup ,Int_t nbinsy,const Double_t *ybins) :TH2(name,title,nbinsx,xlow,xup,nbinsy,ybins)

TH2I(const char *name,const char *title,Int_t nbinsx,const Double_t *xbins ,Int_t nbinsy,const Double_t *ybins) :TH2(name,title,nbinsx,xbins,nbinsy,ybins)

TH2I(const char *name,const char *title,Int_t nbinsx,const Float_t *xbins ,Int_t nbinsy,const Float_t *ybins) :TH2(name,title,nbinsx,xbins,nbinsy,ybins)

TH2I(const TH2I &h2i) : TH2(), TArrayI()

void AddBinContent(Int_t bin)

    *-*-*-*-*-*-*-*-*-*Increment bin content by 1*-*-*-*-*-*-*-*-*-*-*-*-*-*
    *-*                ==========================

void AddBinContent(Int_t bin, Stat_t w)

    *-*-*-*-*-*-*-*-*-*Increment bin content by w*-*-*-*-*-*-*-*-*-*-*-*-*-*
    *-*                ==========================

void Copy(TObject &newth2) const

TH1* DrawCopy(Option_t *option) const

Stat_t GetBinContent(Int_t bin) const

void Reset(Option_t *option)

    *-*-*-*-*-*-*-*Reset this histogram: contents, errors, etc*-*-*-*-*-*-*-*
    *-*            ===========================================

void SetBinContent(Int_t bin, Stat_t content)

     Set bin content

void SetBinsLength(Int_t n)

     Set total number of bins including under/overflow
     Reallocate bin contents array

### Inline Functions

                 Stat_t GetBinContent(Int_t binx, Int_t biny) const
                 Stat_t GetBinContent(Int_t binx, Int_t biny, Int_t) const
                   void SetBinContent(Int_t binx, Int_t biny, Stat_t content)
                   void SetBinContent(Int_t binx, Int_t biny, Int_t, Stat_t content)
                  TH2I& operator=(const TH2I& h1)
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)

Author: Rene Brun 26/12/94
Last update: root/hist:$Name: $:$Id: TH2.cxx,v 1.76 2005/06/24 20:44:07 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *