Dear ROOT team,
I am using the new ROOT version 4.00/02 with intel's icc 8.0 compiler, on
Gentoo 1.2 linux distribution.
Using the Event executable from $ROOTSYS/test, I created an Event.root file.
I then started a ROOT session and loaded the Event.root file and started the
a TreeViewer session (T->StartViewer()). I then made a plot of
fNvertex:fNseg and using the TCanvas Editor I made a graphical cut and
renamed it cut1. Then I made the same plot again with cut1 listed in the
scissor box, and the proper plot was displayed. I then made the same plot
again and got the error
*ERROR 30 :
Bad numerical expression : "cut1"
In earlier versions all graphical cuts were persistant, but it seems they
are deleted now after a single plot. Is this intended?
Thanks
Kerry
Below is the full ROOT session commands
bash-2.05b# root
*******************************************
* *
* W E L C O M E to R O O T *
* *
* Version 4.00/02 21 February 2004 *
* *
* You are welcome to visit our Web site *
* http://root.cern.ch *
* *
*******************************************
FreeType Engine v2.1.3 used to render TrueType fonts.
Compiled for linuxicc with thread support.
CINT/ROOT C/C++ Interpreter version 5.15.123, Feb 9 2004
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] .L libEvent.so
root [1] TFile *f = new TFile("Event.root")
root [2] f.ls()
TFile** Event.root TTree benchmark ROOT file
TFile* Event.root TTree benchmark ROOT file
KEY: TProcessID ProcessID0;1 000e7fd6-a22e-103b-b256-0100007fbeef
KEY: TH1F htime;1 Real-Time to write versus time
KEY: TTree T;1 An example of a ROOT tree
KEY: TH1F hstat;1 Event Histogram
root [3] T->StartViewer()
tv__tree = (TTree *) gROOT->FindObject("T");
tv__tree_list->Add(tv__tree);
File name : Event.root
root [4] firstentry=0, nentries=400
tv__tree->Draw("fNvertex:fNseg","","", 400, 0);
<TCanvas::MakeDefCanvas>: created default TCanvas with name c1
firstentry=0, nentries=400
tv__tree->Draw("fNvertex:fNseg","cut1","", 400, 0);
firstentry=0, nentries=400
tv__tree->Draw("fNvertex:fNseg","cut1","", 400, 0);
*ERROR 30 :
Bad numerical expression : "cut1"
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