Hi Arthur, We provide a macro in $ROOTSYS/tutorials/hadd.C to add histograms from a set of files. Rene Brun Arthur E. Snyder wrote: > > Rene et al., > > Is there some method for adding many histograms that are in many different > root files? > > I have to break my analysis jobs up, so I end up with a set of histograms > from each job which I wish to recombine in the end. > > For the n-tuple that's also produced I use TChain, but since a histograms > is not a tree this doesn't work for histograms. > > Is the best method just to generate a macro that will add the histograms > by brute force? > > Arthur
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