TGraphErrors

class TGraphErrors : public TGraph

    public:

          TGraphErrors TGraphErrors()
          TGraphErrors TGraphErrors(Int_t n)
          TGraphErrors TGraphErrors(Int_t n, Float_t* x, Float_t* y, Float_t* ex = 0, Float_t* ey = 0)
          TGraphErrors TGraphErrors(Int_t n, Double_t* x, Double_t* y, Double_t* ex = 0, Double_t* ey = 0)
          TGraphErrors TGraphErrors(TGraphErrors&)
          virtual void ~TGraphErrors()
        static TClass* Class()
          virtual void ComputeRange(Double_t& xmin, Double_t& ymin, Double_t& xmax, Double_t& ymax)
      virtual Double_t GetErrorX(Int_t bin)
      virtual Double_t GetErrorY(Int_t bin)
             Double_t* GetEX()
             Double_t* GetEY()
       virtual TClass* IsA() const
          virtual void Paint(Option_t* chopt)
          virtual void Print(Option_t* chopt)
          virtual void SavePrimitive(ofstream& out, Option_t* option)
          virtual void Set(Int_t n)
          virtual void SetPoint(Int_t i, Double_t x, Double_t y)
          virtual void SetPointError(Int_t i, Double_t ex, Double_t ey)
          virtual void ShowMembers(TMemberInspector& insp, char* parent)
          virtual void Streamer(TBuffer& b)

  Data Members

    protected:

      Double_t* fEX  [fNpoints] array of X errors
      Double_t* fEY  [fNpoints] array of Y errors

Class Description

   A TGraphErrors is a TGraph with error bars.
   The various format options to draw a TGraphErrors are explained in
     TGraphErrors::Paint.

  The picture below has been generated by the following macro:
------------------------------------------------------------------------
{
   gROOT->Reset();
   c1 = new TCanvas("c1","A Simple Graph with error bars",200,10,700,500);

   c1->SetFillColor(42);
   c1->SetGrid();
   c1->GetFrame()->SetFillColor(21);
   c1->GetFrame()->SetBorderSize(12);

   Int_t n = 10;
   Double_t x[n]  = {-0.22, 0.05, 0.25, 0.35, 0.5, 0.61,0.7,0.85,0.89,0.95};
   Double_t y[n]  = {1,2.9,5.6,7.4,9,9.6,8.7,6.3,4.5,1};
   Double_t ex[n] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};
   Double_t ey[n] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};
   gr = new TGraphErrors(n,x,y,ex,ey);
   gr->SetTitle("TGraphErrors Example");
   gr->SetMarkerColor(4);
   gr->SetMarkerStyle(21);
   gr->Draw("ALP");

   c1->Update();
}

/*

*/

*-*-*-*-*-*-*-*-*-*-*TGraphErrors default constructor*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ================================

*-*-*-*-*-*-*-*-*-*-*TGraphErrors normal constructor*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

  the arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphErrors normal constructor*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

  if ex or ey are null, the corresponding arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphErrors normal constructor*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

  if ex or ey are null, the corresponding arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphErrors default destructor*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

    This function is called by GraphFitChisquare.
    It returns the error along X at point i.

    This function is called by GraphFitChisquare.
    It returns the error along Y at point i.

*-*-*-*-*-*-*-*-*Draw this TGraphErrors with its current attributes*-*-*-*-*
*-*              ==================================================

*-*-*-*-*-*-*-*-*-*-*Print graph and errors values*-*-*-*-*-*-*-*-*-*-*-*
*-*                  =============================

 Save primitive as a C++ statement(s) on output stream out

 Set number of points in the graph
 Existing coordinates are preserved
 New coordinates and errors above fNpoints are preset to 0.

*-*-*-*-*-*-*-*-*-*-*Set x and y values for point number i*-*-*-*-*-*-*-*-*
*-*                  =====================================

*-*-*-*-*-*-*-*-*-*-*Set ex and ey values for point number i*-*-*-*-*-*-*-*
*-*                  =======================================

 Stream an object of class TGraphErrors.

Inline Functions

           Double_t* GetEX()
           Double_t* GetEY()
             TClass* Class()
             TClass* IsA() const
                void ShowMembers(TMemberInspector& insp, char* parent)
        TGraphErrors TGraphErrors(TGraphErrors&)