Hi Martin, On Fri, 14 May 2004, Martin Simard wrote: > > Hello, > > I want to fill histograms using TString like this. > > HistoName->Fill(Variable); > > Do Variable can be a TString?? Yes, you can, but must specify the weight argument TString s="Martin" h.Fill(s,1); See an example in $ROOTSYS/tutorials/hlabels1.C Don't forget to: h.SetBit(TH1::kCanRebin); //before filling h.LabelsDeflate(); // before drawing These two calls are automatically generated when projecting a Tree string variable to a histogram. Rene Brun > > > I know there is a way to use a TString by Project like this. > > ntuple->Project(HistoName, Variable, weight(cut)); > > For this case, How can I use this in a Loop over all entries? > > > Thanks > Martin >
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