Hi Troy, Currently the TreeViewer and the TTree::Draw machinery do not recognize stl vectors of basic types or objects. We are working on improvements in the query system supporting STL types. Meanwhile, you can use a simple variable length array of ints with instead of std::vector<int> fArray; declare int fN; //array length int* fArray; //[fN] In the Treeviewer, you will see the two members. Clicking on fArray will histogram the array. see examples in $ROOTSYS/test/Event.h Rene Brun Troy Straszheim wrote: > > Hi roottalk- > > I'm new to this, have what I hope is an easy question to answer: > > I have a class that contains an stl vector of ints, and I use a TFile and a TTree to write it out to a file. When I load up the file in an interactive session, I can see all the data, as expected, in my branches when I access them directly, e.g. branch->GetEntry(index). However when I click the leave in the tree viewer, I get the message > > Warning in <TSelectorDraw::ProcessFillObject>: Not implemented for vector<int,allocator<int> > > > So I'm guessing that I need to somehow convert this vector into something that is plottable by root. Can anyone suggest a techinque to do this? > > I may have to repeat this process for a very large number of root files with stl vectors of various types... the more generic the better. Perhaps the idea is a file converter, from root-with-stl-nonplottables to root-with-plottables. > > Any tips are gratefully accepted, > > Thanks, > > Troy Straszheim
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