Hello rooters !
Sorry to bug you again with my tree... I'm now one step further (thanks to
Rene and Davide), and I noticed something peculiar : When I use a tree
inside a MakeClass generated code, using functions like sin or sqrt in
Tree::Draw doesn't seem to be possible anymore.
Here is what I did :
root [7] TFile
f("/home/data2002/minidst/DstOut20230/chunk10001/MDST_0.root")
root [8] TTree *tree=(TTree*)f.Get("MDST")
root [9] tree->MakeClass("TestMC")
Info in <TTreePlayer::MakeClass>: Files: TestMC.h and TestMC.C generated
from Tr
ee: MDST
(Int_t)0
root [10] .L TestMC.C
root [11] TestMC tmc(tree)
root [13] tmc.fChain ->Draw("sqrt(number)")
*** Break *** segmentation violation
Root >
root [14]
root [14] tree->Draw("sqrt(number)")
*** Break *** segmentation violation
Root >
root [15]
root [15] TFile
f("/home/data2002/minidst/DstOut20230/chunk10001/MDST_0.root")
root [16] TTree *tree=(TTree*)f.Get("MDST")
root [17] tree->Draw("sqrt(number)")
now ok.
Strange, isn't it ?
I'm usually using the MakeClass generated codes to implement a more
convenient way of chaining the files :
MyClass::MyClass(const char* pattern)
will chain together all files matching pattern.
Therefore I often use MyClass only to chain the files automatically and
then use
MyClass::fChain directly. This is why I would need to have all
functionnalities of Tree::Draw working also in this case.
Do you know what is happening ?
Many thanks,
Colin
ROOT 3.03/08 for gcc 2.95.2 on RH 6.2
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