Hi Hovhannes,
you could simply create a new TTree with a weight branch and for further analysis add it as a friend to the merged tree. You fill that new tree for each event with the current tree's weight. Sounds like a major overhead - but because ROOT's TFiles are zipped this will leave you with almost nothing on disk and a very flexible layout in memory.
Cheers, Axel.
Hovhannes Khandanyan wrote on 07/08/2010 12:55 PM:
>
> Dear ROOTers,
>
> I need to combine TTrees (presumably in TChain ) assigning weights to
> each in much the same way as one makes a weighted sum of the TH1
> histograms. What would be he easiest/recommended way to do this.
>
> Thanks,
> Hovhannes
>
>
>
Received on Thu Jul 08 2010 - 18:08:26 CEST
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