class RooHist: public TGraphAsymmErrors, public RooPlotable

 Create an empty histogram that can be filled with the addBin()
 and addAsymmetryBin() methods. Use the optional parameter to
 specify the confidence level in units of sigma to use for
 calculating error bars. The nominal bin width specifies the
 default used by addBin(), and is used to set the relative
 normalization of bins with different widths.

 Create a histogram from the contents of the specified TH1 object
 which may have fixed or variable bin widths. Error bars are
 calculated using Poisson statistics. Prints a warning and rounds
 any bins with non-integer contents. Use the optional parameter to
 specify the confidence level in units of sigma to use for
 calculating error bars. The nominal bin width specifies the
 default used by addBin(), and is used to set the relative
 normalization of bins with different widths. If not set, the
 nominal bin width is calculated as range/nbins.

 Create a histogram from the asymmetry between the specified TH1 objects
 which may have fixed or variable bin widths, but which must both have
 the same binning. The asymmetry is calculated as (1-2)/(1+2). Error bars are
 calculated using Binomial statistics. Prints a warning and rounds
 any bins with non-integer contents. Use the optional parameter to
 specify the confidence level in units of sigma to use for
 calculating error bars. The nominal bin width specifies the
 default used by addAsymmetryBin(), and is used to set the relative
 normalization of bins with different widths. If not set, the
 nominal bin width is calculated as range/nbins.

 Create histogram as sum of two existing histograms. If Poisson errors are selected the histograms are
 added and Poisson confidence intervals are calculated for the summed content. If wgt1 and wgt2 are not
 1 in this mode, a warning message is printed. If SumW2 errors are selectd the histograms are added
 and the histograms errors are added in quadrature, taking the weights into account.

 Perform common initialization for all constructors.

 Return the number of events of the dataset associated with this RooHist.
 This is the number of events in the RooHist itself, unless a different
 value was specified through setRawEntries()

 Calculate integral of histogram in given range

 Return (average) bin width of this RooHist

 Return the nearest positive integer to the input value
 and print a warning if an adjustment is required.

 Add a bin to this histogram with the specified integer bin contents
 and using an error bar calculated with Poisson statistics. The bin width
 is used to set the relative scale of bins with different widths.

 Add a bin to this histogram with the specified bin contents
 and error. The bin width is used to set the relative scale of
 bins with different widths.

 Add a bin to this histogram with the value (n1-n2)/(n1+n2)
 using an error bar calculated with Binomial statistics.

 Destructor

 Return kTRUE if binning of this RooHist is identical to that of 'other'

 Return kTRUE if contents of this RooHIst is identical within given
 absolute tolerance to that of 'other'

 Print info about this histogram to the specified output stream.

   Standard: number of entries
      Shape: error CL and maximum value
    Verbose: print our bin contents and errors

 Print name of RooHist

 Print title of RooHist

 Print class name of RooHist

 Create and return RooHist containing  residuals w.r.t to given curve.
 If normalize is true, the residuals are normalized by the histogram
 errors creating a RooHist with pull values

 Printing interface