I have a question concerning the example program given in the description of class TTree. In the example, a TH1F object is a branch of a tree // Create a ROOT Tree TTree *tree = new TTree("T","An example of ROOT tree with a few branches"); tree->Branch("point",&point,"x:y:z"); tree->Branch("eventn",&eventn,"ntrack/I:nseg:nvertex:flag/i:temperature/F"); tree->Branch("hpx","TH1F",&hpx,128000,0); I ran the example program and when I look at directory structure of the root file created using TBrowser, I saw the histogram hpx and the branch hpx inside the T tree directory. When I double click on the histogram hpx, the histogram is plotted, but when I double click on the branch hpx, nothing happenned. If a histogram object can be a branch of a tree, why can't I access it from the tree directory? Why should the histogram show up in 2 places in the directory structure? If histogram is a branch of a tree, will the histograms be added when the same tree from different root files are chained together using TChain? Seng
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:43:42 MET