Root team: This is a followup to an earlier e-mail. It seems that the problem I am having with TTree::Draw() only exists in ROOT 2.00/10. I in fact see this problem even if all TClonesArrays are filled, whereas using 2.00/09 works fine. I'm working on Solaris with the Sun Workshop C++ compiler 4.2. regards, Mark. On Mon, 10 Aug 1998, Mark Boulay wrote: > Dear root team, > I have a couple of questions about using TTree:Draw(). > First, I am wondering if it possible to produce a TTree containing > a TClonesArray branch, with some events having this array filled, > and others with an empty TClonesArray, and still use the TTree::Draw() > command for data contained in the TClonesArray. I have a tree with these > characteristics, and can retrieve events with TTree::GetEvent(), but > using TTree::Draw() for data in the TClonesArray causes root to hang. > The second (unrelated) question I have is about the autoscaling > of axies for TTree::Draw(). Is is possible to have the entire range > of the data in the tree scanned before choosing the axis scaling? It > now seems that a small number of events are sampled to choose the scale. > > Thanks in advance for your help, > Mark. > > > ================================================================= > = = > = Mark Boulay = > = Department of Physics phone/voice mail: (613) 545-6861 = > = Queen's University fax: (613) 545-6813 = > = Kingston, Ontario email: mgb@sno.phy.queensu.ca = > = Canada, K7L 3N6 = > = = > ================================================================= > > > >
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