Hi Markus, Looking at your Tree, via TTree::Print, I see: *Br 0 :costhetasph : cos theta sphericity/F *Entries : 30 : Total Size= 12605 bytes One basket in memory *Baskets : 0 : Basket Size= 32000 bytes Compression= 1.00 *......................................................................... *Br 1 :cleofisher : the cleo cones fisher/F *Entries : 30 : Total Size= 12605 bytes One basket in memory *Baskets : 0 : Basket Size= 32000 bytes Compression= 1.00 *......................................................................... etc... then doing GetListOfLeaves->ls(): OBJ: TLeafF cos theta sphericity cos theta sphericity : OBJ: TLeafF the cleo cones fisher the cleo cones fisher OBJ: TLeafF the legendre fisher the legendre fisher : etc... I do not understand how you have built this Tree. In your case the branch name (seen in TTree::Print) should be the same as the leaf name. Did you reset the leaf name yourself? Anyhow, the solution to your problem is to loop on the list of branches. root [1] selectedtree.GetListOfBranches()->ls() OBJ: TBranch costhetasph cos theta sphericity/F OBJ: TBranch cleofisher the cleo cones fisher/F OBJ: TBranch legendrefisher the legendre fisher/F : etc... or in your iterator on the list of leaves, instead of tree.Draw(leaf->GetName()); do tree.Draw(leaf->GetBranch()->GetName()); Rene Brun On Thu, 19 Jun 2003, Markus Cristinziani wrote: > Hi Rene, > > please have a look at > > http://www.slac.stanford.edu/~markus/reduced.root > the tree name is "selectedtree". > > The definition of the tree is > > ... > TBranch * cossph = tree->Branch("costhetasph", &Csbtr,"cos theta sphericity/F"); > ... > > Philipp Canal's posting suggests that I should book the tree differently > in the first place ?! > > Thanks > Markus > > ____________________________________________ > / Markus Cristinziani, Research Associate / > / Stanford Linear Accelerator Center / > / ++1(650)926-3886 markus@slac.stanford.edu / > -------------------------------------------- > > On Thu, 19 Jun 2003, Rene Brun wrote: > > > Hi Markus, > > > > Could you send me a mini Tree file that I can use > > to understand your problem? > > give me the AFS address (making sure it is world public readable) > > or put it on a web server. > > > > Rene Brun > > > > On Thu, > > 19 Jun 2003, > > Markus Cristinziani wrote: > > > > > Hi Rene, > > > > > > yes I forgot to copy and paste the line > > > leaf = (TLeaf*)next(). > > > > > > when I do > > > tree->GetListOfLeaves()->ls(); > > > > > > I get > > > root [8] selectedtree->GetListOfLeaves()->ls() > > > OBJ: TLeafF this is its description this is its description : 0 at: > > > 0x8b9eb78 > > > ... > > > > > > instead of the (expected?) > > > OBJ: TLeafF variablename this is its description : 0 at: > > > 0x8b9eb78 > > > ... > > > > > > regards > > > Markus > > > > > > > > > ____________________________________________ > > > / Markus Cristinziani, Research Associate / > > > / Stanford Linear Accelerator Center / > > > / ++1(650)926-3886 markus@slac.stanford.edu / > > > -------------------------------------------- > > > > > > On Thu, 19 Jun 2003, Rene Brun wrote: > > > > > > > Hi Markus, > > > > > > > > In your example, you have omitted the most critical part: how you get > > > > the leaf pointer? > > > > The following should work: > > > > > > > > TLeaf *leaf; > > > > TIter next (tree->GetListOfLeaves()); > > > > while ((leaf = (TLeaf*)next())) { > > > > tree->Draw(leaf->GetName()); > > > > } > > > > > > > > I would need your code to figure out the problem. > > > > What is the ouput of: > > > > tree->GetListOfLeaves()->ls(); ? > > > > > > > > Rene Brun > > > > > > > > Markus Cristinziani wrote: > > > > > > > > > > Hello, > > > > > > > > > > I have a simple tree and I would like to histogram all variables in an > > > > > automatic way. I do the following in 3.03/09 > > > > > > > > > > TFile f("myfile.root"); > > > > > tree->Print; > > > > > > > > > > ... > > > > > ****************************************************************************** > > > > > *Br 0 :varname : this is its description/F > > > > > * > > > > > *Entries : 8877 : Total Size= 48065 bytes File Size = 28030 * > > > > > *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.14 > > > > > * > > > > > *............................................................................* > > > > > ... > > > > > > > > > > TLeaf *leaf; > > > > > TIter next (tree->GetListOfLeaves()); > > > > > leaf->GetTitle(); -> "this is its description" > > > > > leaf->GetName(); -> "this is its description" > > > > > > > > > > i.e. I don't get its name, so I can't do tree->Draw(leaf->GetName()); > > > > > > > > > > *ERROR 26 : > > > > > Unknown name : "thisisitsdescription" > > > > > > > > > > Any suggestions ? > > > > > > > > > > Thanks, > > > > > Markus > > > > > > > > > > ____________________________________________ > > > > > / Markus Cristinziani, Research Associate / > > > > > / Stanford Linear Accelerator Center / > > > > > / ++1(650)926-3886 markus@slac.stanford.edu / > > > > > -------------------------------------------- > > > > > > > > > > > >
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