Re: TTree::Draw bug?

Andre,

Did you install ROOT from source?
Which version of gcc do you use?

Rene

Andre Lebedev wrote:
> Hello.
>
> I see this on Fedora 5 with ROOT 5.12/00f. I couldn't reproduce this
> on two other machines either, so I guess it's a peculiarity that I'll
> have to live with.
>
> Thanks,
> Andre.
>
> Rene Brun wrote:
>> Andre,
>>
>> I cannot reproduce this problem with either 5.12 or 5.13.
>> You did not answer ma question about your vesrion of ROOT and OS.
>>
>> Rene
>>
>> Andre Lebedev wrote:
>>> Rene,
>>>
>>> I can reproduce the problem typing the following at the command line:
>>> root [0] TTree* tree = new TTree("tree", "tree")
>>> root [1] double x, y
>>> root [3] tree->Branch("x", &x, "x/D")
>>> (class TBranch*)0x9f28478
>>> root [4] tree->Branch("y", &y, "y/D")
>>> (class TBranch*)0x9e92f08
>>> root [5] x = 1e9
>>> (const double)1.00000000000000000e+09
>>> root [6] for (y = 0; y < 1000; y += 1) tree->Fill()
>>> root [7] tree->Print()
>>> ******************************************************************************
>>>
>>> *Tree :tree :
>>> tree *
>>> *Entries : 1000 : Total = 17475 bytes File Size
>>> = 0 *
>>> * : : Tree compression factor =
>>> 1.00 *
>>> ******************************************************************************
>>>
>>> *Br 0 :x :
>>> x/D *
>>> *Entries : 1000 : Total Size= 8610 bytes One basket in
>>> memory *
>>> *Baskets : 0 : Basket Size= 32000 bytes Compression=
>>> 1.00 *
>>> *............................................................................*
>>>
>>> *Br 1 :y :
>>> y/D *
>>> *Entries : 1000 : Total Size= 8610 bytes One basket in
>>> memory *
>>> *Baskets : 0 : Basket Size= 32000 bytes Compression=
>>> 1.00 *
>>> *............................................................................*
>>>
>>> root [8] tree->Draw("x")
>>> <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
>>>
>>> The canvas remains blank and I don't get the prompt back.
>>>
>>> Regards,
>>> Andre.
>>>
>>> Rene Brun wrote:
>>>> Andre,
>>>>
>>>> I cannot reproduce this problem with version 5.12 or 5.13.
>>>> Coould you send a script and short data file reproducing this problem?
>>>>
>>>> Rene
>>>>
>>>>
>>>> Andre Lebedev wrote:
>>>>> Hello, ROOTers.
>>>>>
>>>>> I believe there is a bug in TTree::Draw() when the variable to be
>>>>> drawn has no range. That is I have a tree where for some selection
>>>>> of cuts one of the variables is 1e9. If I do
>>>>>
>>>>> swtest->Draw("x2[0]>>h(100,0,1.1e9)", "z<-830")
>>>>>
>>>>> everything goes through ok. However, if I do
>>>>>
>>>>> swtest->Draw("x2[0]", "z<-830")
>>>>>
>>>>> The code prints the number of events that pass the cut and then
>>>>> hangs in
>>>>> #0 0x0076b501 in isnan () from /lib/libm.so.6
>>>>> #1 0x00768a5b in pow () from /lib/libm.so.6
>>>>> #2 0x0195009c in TGaxis::PaintAxis ()
>>>>> from /usr/local/mipp/extern/root-5.12.00f/lib/libGraf.so
>>>>> #3 0x01c45f95 in THistPainter::PaintAxis ()
>>>>> from /usr/local/mipp/extern/root-5.12.00f/lib/libHistPainter.so
>>>>> #4 0x01c428a3 in THistPainter::Paint ()
>>>>> from /usr/local/mipp/extern/root-5.12.00f/lib/libHistPainter.so
>>>>> #5 0x02063775 in TH1::Paint ()
>>>>> from /usr/local/mipp/extern/root-5.12.00f/lib/libHist.so
>>>>>
>>>>> I am running ROOT 5.12/00f on gcc 4.1.1. However, I don't see the
>>>>> same problem in ROOT 5.10/00 built on gcc-3.3.4.
>>>>>
>>>>> Regards,
>>>>> Andre.
Received on Wed Nov 29 2006 - 15:42:49 MET