class AliPWGHistoTools: public TObject

 ctor

 dtor

 convert the x axis from pt to mt. Assumes you have 1/pt dNdpt in the histo you start with

 convert the x axis from mt to pt. Assumes you have 1/mt dNdmt in the histo you start with

 Convert a histo to a graph
 if binWidth is true ex is set to the bin width of the histos, otherwise it is set to zero

 Combines 3 histos (h1,h2,h3), weighting by the errors provided in
 he1,he2,he3, supposed to be the independent systematic errors.
 he1,he2,he3 are also assumed to have the same binning as h1,h2,h3
 The combined histo must fit the template provided (no check is performed on this)
 The histogram are supposed to come from the same (nearly) sample
 of tracks. statFrom tells the stat error of which of the 3 is
 going to be assigned to the combined
 Optionally, it is possible to rescale any of the histograms.
 if hSyst is give, the histo is filled with combined syst error vs pt
 if errorFromBinContent is true, the weights are taken from the he* content rather than errors

 Computes the mean of the combined data and extrapolation in a
 given range, use data where they are available and the function
 where data are not available
 ERROR from DATA ONLY is returned in this version!

 Combine two histos. This assumes the histos have the same binning
 in the overlapping region. It computes the arithmetic mean in the
 overlapping region and assigns as an error the relative error
 h2. TO BE IMPROVED

 Returns the yield extracted from the data in the histo where
 there are points and from the fit to extrapolate, in the given
 range.
 Partial yields are also returned if the corresponding pointers are non null

 Returns an histogram with the same binning as h, filled with the relative error bin by bin

 Divides 2 histos even if they have a different binning. Finds
 overlapping bins and divides them

 function to compute integral and optionally the error  between the limits
 specified by the bin number values working for all histograms (1D, 2D and 3D)
 copied from TH! to fix a bug still present in 5-27-06b

 Computes dMtdEta integrating dN/dptdy with the proper weights and jacobian.