Re: Names of histograms reset after TFileMerger

 I think Yves is using the same version as me (v5-19-04) since in fact we are working on the same platform.
 Looking forward for your help! Thanks a lot! Regards,
 Yaxian

Rene Brun wrote:
> Yves,
>
> When I run your script I obtain the output below and it is what I
> expect. What is your version of ROOT?
>
> Rene
>
> root [1] .x merge.C
> [TFile::Cp] Total 0.02 MB |====================| 100.00 % [47.9 MB/s]
> [TFile::Cp] Total 0.02 MB |====================| 100.00 % [54.0 MB/s]
> [TFile::Cp] Total 0.02 MB |====================| 100.00 % [55.9 MB/s]
> hPtGammaScaled Number of #gamma over calorimeter
> hPhiGammaScaled #phi_{#gamma}
> hEtaGammaScaled #phi_{#gamma}
> hConePtSumScaled #Sigma p_{T} in cone
> hPtPromptScaled Number of #gamma over calorimeter
> hPhiPromptScaled #phi_{#gamma}
> hEtaPromptScaled #phi_{#gamma}
> hPtFragmentationScaled Number of #gamma over calorimeter
> hPhiFragmentationScaled #phi_{#gamma}
> hEtaFragmentationScaled #phi_{#gamma}
> hPtPi0DecayScaled Number of #gamma over calorimeter
> hPhiPi0DecayScaled #phi_{#gamma}
> hEtaPi0DecayScaled #phi_{#gamma}
> hPtOtherDecayScaled Number of #gamma over calorimeter
> hPhiOtherDecayScaled #phi_{#gamma}
> hEtaOtherDecayScaled #phi_{#gamma}
> hPtConversionScaled Number of #gamma over calorimeter
> hPhiConversionScaled #phi_{#gamma}
> hEtaConversionScaled #phi_{#gamma}
> hPtUnknownScaled Number of #gamma over calorimeter
> hPhiUnknownScaled #phi_{#gamma}
> hEtaUnknownScaled #phi_{#gamma}
> TFile** mergedOutput.root
> TFile* mergedOutput.root
> KEY: TList histosscaled;1 Doubly linked list
> root [2]
>
>
> Yves Schutz wrote:
>> Rene,
>> The wrong macro has been sent to you. What Yaxian wanted to point to
>> is that the Name of the Merged histograms are not kept.
>> Just run the following macro. Thanks ... Yves
>> void merge()
>> {
>> TFileMerger m ;
>> TString outName("mergedOutput.root") ;
>> m.OutputFile(outName) ;
>> m.AddFile("histosscaled1.root") ;
>> m.AddFile("histosscaled2.root") ;
>> m.Merge() ;
>> TFile in("histosscaled1.root") ;
>> TList * l = (TList*)in.Get("histosscaled") ;
>> for (Int_t index = 0; index < l->GetEntries(); index++)
>> cout << l->At(index)->GetName() << " " << l->At(index)->GetTitle()
>> << endl ; ;
>> TFile out(outName) ;
>> out.ls() ;
>> }
>>
>> and you get
>> hPtGammaScaled Number of #gamma over calorimeter
>> hPhiGammaScaled #phi_{#gamma}
>> hEtaGammaScaled #phi_{#gamma}
>> hConePtSumScaled #Sigma p_{T} in cone
>> hPtPromptScaled Number of #gamma over calorimeter
>> hPhiPromptScaled #phi_{#gamma}
>> hEtaPromptScaled #phi_{#gamma}
>> hPtFragmentationScaled Number of #gamma over calorimeter
>> hPhiFragmentationScaled #phi_{#gamma}
>> hEtaFragmentationScaled #phi_{#gamma}
>> hPtPi0DecayScaled Number of #gamma over calorimeter
>> hPhiPi0DecayScaled #phi_{#gamma}
>> hEtaPi0DecayScaled #phi_{#gamma}
>> hPtOtherDecayScaled Number of #gamma over calorimeter
>> hPhiOtherDecayScaled #phi_{#gamma}
>> hEtaOtherDecayScaled #phi_{#gamma}
>> hPtConversionScaled Number of #gamma over calorimeter
>> hPhiConversionScaled #phi_{#gamma}
>> hEtaConversionScaled #phi_{#gamma}
>> hPtUnknownScaled Number of #gamma over calorimeter
>> hPhiUnknownScaled #phi_{#gamma}
>> hEtaUnknownScaled #phi_{#gamma}
>> TFile** mergedOutput.root
>> TFile* mergedOutput.root
>> KEY: TH2F histosscaled;22 #phi_{#gamma}
>> KEY: TH2F histosscaled;21 #phi_{#gamma}
>> KEY: TH1F histosscaled;20 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;19 #phi_{#gamma}
>> KEY: TH2F histosscaled;18 #phi_{#gamma}
>> KEY: TH1F histosscaled;17 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;16 #phi_{#gamma}
>> KEY: TH2F histosscaled;15 #phi_{#gamma}
>> KEY: TH1F histosscaled;14 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;13 #phi_{#gamma}
>> KEY: TH2F histosscaled;12 #phi_{#gamma}
>> KEY: TH1F histosscaled;11 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;10 #phi_{#gamma}
>> KEY: TH2F histosscaled;9 #phi_{#gamma}
>> KEY: TH1F histosscaled;8 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;7 #phi_{#gamma}
>> KEY: TH2F histosscaled;6 #phi_{#gamma}
>> KEY: TH1F histosscaled;5 Number of #gamma over calorimeter
>> KEY: TH2F histosscaled;4 #Sigma p_{T} in cone
>> KEY: TH2F histosscaled;3 #phi_{#gamma}
>> KEY: TH2F histosscaled;2 #phi_{#gamma}
>> KEY: TH1F histosscaled;1 Number of #gamma over calorimeter
>> Le 10 juin 08 ?08:40, Rene Brun a 閏rit :
>>
>>> I do not understand what you are trying to achieve. Your histograms are
>>> correctly merged with the statement
>>> Bool_t result = m.Merge();
>>>
>>> but I have no idea of what you want to do with the code following this
>>> statement.
>>> Your input files contain a TList of histograms, but you loop on the
>>> TKeys as if each histogram was a TKey.
>>>
>>> Rene Brun
>>>
>>> Yaxian Mao wrote:
>>>> Dear Rene and all,
>>>> I encounterd one problem when I try to merge two different root
>>>> files by TFileMerger,
>>>> which never happened before. After merging, all names of histograms
>>>> in the root file
>>>> are reseted by itself. I can not understand why, could somebody help
>>>> me to solve this
>>>> problem? Thanks very much!
>>>> My root version is: v5-19-04
>>>> Best regards,
>>>> Yaxian
>>>
>>
>>> ============================================
>>> Yves SCHUTZ (IN2P3-CNRS) collaboration ALICE
>>> Office: 301 01 022 GSM: +41 76 487 4755
>>> Mailbox: F02210 Tel: +41 22 76 72 131
>>> CERN Fax: +41 22 76 79 480
>>> CH-1211 Gen鑦e 23 m閘: schutz_at_in2p3.fr <mailto:schutz_at_in2p3.fr>
>>
>
>
>

• Yaxian Mao *
• *
• Address: Institute of Particle Physics, *
• Huazhong Normal University *
• Wuhan, 430079, P. R. China *
• Tel: 0086 27 6786 7946 (lab) *
• 0086 27 8785 2613 (dormitory) *
• Fax: 0086 27 6786 3213 *
• Email: maoyx_at_iopp.ccnu.edu.cn *
• Yaxian.Mao_at_gmail.com *

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