Hi Rene, The root file location is in my previous message to you. The root version is 3.03/07. I made the tree within our minos version of root, and get the same bad result whether I analyse with the minos version or root proper. The draw command that doesn't work is simply T->Draw("adc:tframe") It immediately sets the X axis from 0. to 50., and depending on the machine, the root session may or may not seize. On the contrary, T->Draw("tframe") works just fins, with the correct range of about (0.,100.) Many thanks, Peter Shanahan On Sat, 17 Aug 2002, Rene Brun wrote: > Hi Peter, > > Could you put your file in some public area/web server > and let me know the address as well as the TTree::Draw > command that shows this problem? > Which version of Root are you using? > > Rene Brun > > > On Fri, 16 Aug 2002, Peter Shanahan wrote: > > > Dear Root Experts, > > > > I am having trouble with a simple, 1 branch TTree. Since the problem > > doesn't occur for smaller TTrees (less than 5-10 Mb), the debugging loop > > is very slow. > > > > So, my first and main question is, is there a way to check the sanity > > of a tree, beyond TTree::Print()? > > > > My second question is, does the odd behavior described below ring > > a bell with anyone? Is there something about how TTree::Draw() gets > > variable ranges for 2-D plots that offers a clue to what I might be > > doing wrong? > > > > I write the tree to a file, close the file, and open it in a > > completely new session, which knows nothing of the macro I used to create > > and fill the tree. TTree::Print() looks fine. 1-D plots are fine, with > > or without cuts on other variables. TTree::Scan() is also fine. > > > > When I try to do a 2-D plot, however, axes are drawn almost > > immediately, with too small a range for one of the variables, in at > > least one case. (That case involves a variable that is monotonic in > > entry number). The memory usage of the root process goes to 3 times the > > normal level, and it takes much, much longer to draw than a 1-D plot. > > > > Any ideas? Many Thanks, > > > > Peter Shanahan
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:51:05 MET