TGraphBentErrors

class TGraphBentErrors : public TGraph

    protected:

      virtual Double_t** Allocate(Int_t size)
            virtual void CopyAndRelease(Double_t** newarrays, Int_t ibegin, Int_t iend, Int_t obegin)
          virtual Bool_t CopyPoints(Double_t** arrays, Int_t ibegin, Int_t iend, Int_t obegin)
                  Bool_t CtorAllocate()
            virtual void FillZero(Int_t begin, Int_t end, Bool_t from_ctor = kTRUE)
            virtual void SwapPoints(Int_t pos1, Int_t pos2)

    public:

                        TGraphBentErrors()
                        TGraphBentErrors(Int_t n)
                        TGraphBentErrors(Int_t n, const Float_t* x, const Float_t* y, const Float_t* exl = 0, const Float_t* exh = 0, const Float_t* eyl = 0, const Float_t* eyh = 0, const Float_t* exld = 0, const Float_t* exhd = 0, const Float_t* eyld = 0, const Float_t* eyhd = 0)
                        TGraphBentErrors(Int_t n, const Double_t* x, const Double_t* y, const Double_t* exl = 0, const Double_t* exh = 0, const Double_t* eyl = 0, const Double_t* eyh = 0, const Double_t* exld = 0, const Double_t* exhd = 0, const Double_t* eyld = 0, const Double_t* eyhd = 0)
                        TGraphBentErrors(const TGraphBentErrors& gr)
                virtual ~TGraphBentErrors()
           virtual void Apply(TF1* f)
         static TClass* Class()
           virtual void ComputeRange(Double_t& xmin, Double_t& ymin, Double_t& xmax, Double_t& ymax) const
       virtual Double_t GetErrorX(Int_t bin) const
       virtual Double_t GetErrorY(Int_t bin) const
              Double_t* GetEXhigh() const
              Double_t* GetEXlow() const
              Double_t* GetEYhigh() const
              Double_t* GetEYlow() const
        virtual TClass* IsA() const
      TGraphBentErrors& operator=(const TGraphBentErrors&)
           virtual void Paint(Option_t* chopt)
           virtual void Print(Option_t* chopt) const
           virtual void SavePrimitive(ofstream& out, Option_t* option)
           virtual void SetPointError(Double_t exl, Double_t exh, Double_t eyl, Double_t eyh)
           virtual void SetPointError(Int_t i, Double_t exl, Double_t exh, Double_t eyl, Double_t eyh)
           virtual void ShowMembers(TMemberInspector& insp, char* parent)
           virtual void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

      Double_t* fEXlow    [fNpoints] array of X low errors
      Double_t* fEXhigh   [fNpoints] array of X high errors
      Double_t* fEYlow    [fNpoints] array of Y low errors
      Double_t* fEYhigh   [fNpoints] array of Y high errors
      Double_t* fEXlowd   [fNpoints] array of X low displacements
      Double_t* fEXhighd  [fNpoints] array of X high displacements
      Double_t* fEYlowd   [fNpoints] array of Y low displacements
      Double_t* fEYhighd  [fNpoints] array of Y high displacements

Class Description

   A TGraphBentErrors is a TGraph with bent, assymetric error bars.
   The various format options to draw a TGraphBentErrors are explained in
     TGraphBentErrors::Paint.

  The picture below has been generated by the following macro:
  FIXME There are 2 bent error bars in the picture, not one!
------------------------------------------------------------------------
{
   gROOT->Reset();

   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 exl[n] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};
   Double_t eyl[n] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};
   Double_t exh[n] = {.02,.08,.05,.05,.03,.03,.04,.05,.06,.03};
   Double_t eyh[n] = {.6,.5,.4,.3,.2,.2,.3,.4,.5,.6};
   Double_t exld[n] = {.0,.0,.0,.0,.0,.0,.0,.0,.0,.0};
   Double_t eyld[n] = {.0,.0,.05,.0,.0,.0,.0,.0,.0,.0};
   Double_t exhd[n] = {.0,.0,.0,.0,.0,.0,.0,.0,.0,.0};
   Double_t eyhd[n] = {.0,.0,.0,.0,.0,.0,.0,.0,.05,.0};
   gr = new TGraphBentErrors(n,x,y,exl,exh,eyl,eyh,exld,exhd,eyld,eyhd);
   gr->SetTitle("TGraphBentErrors Example");
   gr->SetMarkerColor(4);
   gr->SetMarkerStyle(21);
   gr->Draw("ALP");
}

*-*-*-*-*-*-*-*-*-*-*TGraphBentErrors default constructor*-*-*-*-*-*-*-*-*-*
*-*                  =====================================

 TGraphBentErrors copy constructor

*-*-*-*-*-*-*-*-*-*-*TGraphBentErrors normal constructor*-*-*-*-*-*-*-*-*-*-*
*-*                  ====================================

  the arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphBentErrors normal constructor*-*-*-*-*-*-*-*-*-*-*
*-*                  ====================================

  if exl,h or eyl,h are null, the corresponding arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphBentErrors normal constructor*-*-*-*-*-*-*-*-*-*-*
*-*                  ====================================

  if exl,h or eyl,h are null, the corresponding arrays are preset to zero

*-*-*-*-*-*-*-*-*-*-*TGraphBentErrors default destructor*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

 apply a function to all data points
 y = f(x,y)

 Errors are calculated as eyh = f(x,y+eyh)-f(x,y) and
 eyl = f(x,y)-f(x,y-eyl)

 Special treatment has to be applied for the functions where the
 role of "up" and "down" is reversed.
 function suggested/implemented by Miroslav Helbich <helbich@mail.desy.de>

 Copy errors from fE*** to arrays[***]
 or to f*** Copy points.

 Should be called from ctors after fNpoints has been set

    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.

 Set zero values for point arrays in the range [begin, end)

 Paint this TGraphBentErrors with its current attributes

 by default horizonthal and vertical small lines are drawn at
 the end of the error bars. if option "z" or "Z" is specified,
 these lines are not drawn.

 if option contains ">" an arrow is drawn at the end of the error bars
 if option contains "|>" a full arrow is drawn at the end of the error bars
 the size of the arrow is set to 2/3 of the marker size.

 By default, error bars are drawn. If option "X" is specified,
 the errors are not drawn (TGraph::Paint equivalent).

 if option "[]" is specified only the end vertical/horizonthal lines
 of the error bars are drawn. This option is interesting to superimpose
 systematic errors on top of a graph with statistical errors.
 if option "2" is specified error rectangles are drawn.

 if option "3" is specified a filled area is drawn through the end points >
 the vertical error bars.

 if option "4" is specified a smoothed filled area is drawn through the end
 points of the vertical error bars.

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

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

*-*-*-*-*-*-*Set ex and ey values for point pointed by the mouse*-*-*-*
*-*          ===================================================

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

Inline Functions

               Double_t** Allocate(Int_t size)
                Double_t* GetEXlow() const
                Double_t* GetEXhigh() const
                Double_t* GetEYlow() const
                Double_t* GetEYhigh() const
                  TClass* Class()
                  TClass* IsA() const
                     void ShowMembers(TMemberInspector& insp, char* parent)
                     void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)
        TGraphBentErrors& operator=(const TGraphBentErrors&)