class TGraphErrors: public TGraph

 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

 constructor with four vectors of floats in input
 A grapherrors is built with the X coordinates taken from vx and Y coord from vy
 and the errors from vectors vex and vey.
 The number of points in the graph is the minimum of number of points
 in vx and vy.

 constructor with four vectors of doubles in input
 A grapherrors is built with the X coordinates taken from vx and Y coord from vy
 and the errors from vectors vex and vey.
 The number of points in the graph is the minimum of number of points
 in vx and vy.

 TGraphErrors copy constructor

 TGraphErrors assignment operator

 TGraphErrors constructor importing its parameters from the TH1 object passed as argument

 GraphErrors constructor reading input from filename
 filename is assumed to contain at least 3 columns of numbers
 convention for format (default="%lg %lg %lg %lg)
  format = "%lg %lg"         read only 2 first columns into X,Y
  format = "%lg %lg %lg"     read only 3 first columns into X,Y and EY
  format = "%lg %lg %lg %lg" read only 4 first columns into X,Y,EX,EY

 TGraphErrors default destructor.

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

 The error is calculated as ey=(f(x,y+ey)-f(x,y-ey))/2
 This is the same as error(fy) = df/dy * ey for small errors

 For generic functions the symmetric errors might become non-symmetric
 and are averaged here. Use TGraphAsymmErrors if desired.

 error on x doesn't change
 function suggested/implemented by Miroslav Helbich <helbich@mail.desy.de>

 Calculate scan fields.

 Compute range.

 Copy and release.

 Copy errors from fEX and fEY to arrays[0] and arrays[1]
 or to fX and fY. Copy points.

 Constructor allocate.

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

 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.

 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 X at point i.

 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 X at point i.

 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.

 Stream an object of class TGraphErrors.

 Swap points