Re: Adding a vector to a tree

Hi Nicolas,

I was using the example as a macro too, and it was working. I have not tried to compile it yet, I will do that and let you know what I get.

Best,
Bin

Nicolas Busca wrote:
>
> Hi Philippe,
>
> your macro works ok for me when I run it as a macro (by doing .L ...
> ). It's when I run it as a compiled program that it gives the error
> message.
>
> I'm using root 5.13/02 on a mac with the default options for building...
>
> Thanks for your prompt responses,
>
> Nicolas Busca
>
> On Oct 19, 2007, at 5:25 PM, Philippe Canal wrote:
>
>> Hi,
>>
>> I just re-tried the script I gave you:
>> {
>> #include <vector>
>> TFile *f = new TFile("peter.root", "recreate");
>> TTree * t1 = new TTree("nEmcPhotons", "EMC Photons");
>> vector<float> *E = new vector<float>;
>> t1->Branch("E", &E);
>> }
>>
>> with ROOT 5.17/04 and it works fine for me.
>> Which version of ROOT are you using? How was it build (in particular
>> are the cintdlls built?).
>>
>> Philippe
>>
>> ------------------------------------------------------------------------
>> *From:* Nicolas Busca [mailto:ngbusca_at_gmail.com]
>> *Sent:* Friday, October 19, 2007 10:16 AM
>> *To:* Philippe Canal
>> *Cc:* 'Bin Guo'; roottalk_at_root.cern.ch <mailto:roottalk_at_root.cern.ch>
>> *Subject:* Re: [ROOT] Adding a vector to a tree
>>
>>
>> Absolutely, I include vector.h in the beginning of my program...
>> still I get the same error.
>>
>> Thanks!
>>
>> Nicolas.
>>
>> On Oct 19, 2007, at 5:14 PM, Philippe Canal wrote:
>>
>>> Hi,
>>> Did you try after doing:
>>> > Also you need to make sure the dictionary for vector<float> is
>>> loaded (for example add #include <vector>).
>>> I.e. Try
>>> {
>>> #include <vector>
>>> TFile *f = new TFile("peter.root", "recreate");
>>> TTree * t1 = new TTree("nEmcPhotons", "EMC Photons");
>>> vector<float> *E = new vector<float>;
>>> t1->Branch("E", &E);
>>> }
>>> Philippe.
>>>
>>> ------------------------------------------------------------------------
>>> *From:* Nicolas Busca [mailto:ngbusca_at_gmail.com]
>>> *Sent:* Friday, October 19, 2007 10:08 AM
>>> *To:* Philippe Canal
>>> *Cc:* Bin Guo; roottalk_at_root.cern.ch <mailto:roottalk_at_root.cern.ch>
>>> *Subject:* Re: [ROOT] Adding a vector to a tree
>>>
>>>
>>> I tried to use the macro below in a compiled program, and I get an
>>> error at running time:
>>>
>>> Error in <TTree::Branch>: The pointer specified for ... is not of a
>>> class known to ROOT
>>>
>>> Any ideas?
>>>
>>> Thanks!
>>>
>>> Nicolas
>>>
>>> On Oct 18, 2007, at 8:46 PM, Philippe Canal wrote:
>>>
>>>> Use
>>>> {
>>>> TFile *f = new TFile("peter.root", "recreate");
>>>> TTree * t1 = new TTree("nEmcPhotons", "EMC Photons");
>>>> vector<float> *E = new vector<float>;
>>>> t1->Branch("E", &E);
>>>> }
>>>>
>>>> Also you need to make sure the dictionary for vector<float> is
>>>> loaded (for example add #include <vector>).
>>>>
>>>> Cheers,
>>>> Philippe.
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: Bin Guo <Bin.Guo_at_cern.ch <mailto:Bin.Guo_at_cern.ch>>
>>>> Date: Thursday, October 18, 2007 1:43 pm
>>>> Subject: [ROOT] Adding a vector to a tree
>>>> To: roottalk_at_root.cern.ch <mailto:roottalk_at_root.cern.ch>
>>>>
>>>>
>>>>> Hi Rooters,
>>>>>
>>>>> I want to add a vector to a root tree, and make it a branch of
>>>>> that tree.
>>>>> I found the example of adding an array to a tree like below:
>>>>>
>>>>> {
>>>>> TFile *f = new TFile("peter.root", "recreate");
>>>>> Int_t nPhot;
>>>>> Float_t E[500];
>>>>> TTree * t1 = new TTree("nEmcPhotons", "EMC Photons");
>>>>> t1->Branch("nPhot", &nPhot, "nPhot/I");
>>>>> t1->Branch("E", E, "E[nPhot]/F");
>>>>> }
>>>>>
>>>>>
>>>>> Now if I want to change E[500] array above to a vector:
>>>>> "vector<float> E",
>>>>> how do I change the t1->Branch("E", E, "E[nPhot]/F") line ?
>>>>>
>>>>> Namely, how do I write the 3rd argument of the "Branch()" method for
>>>>> a
>>>>> vector?
>>>>>
>>>>> Thanks for the help!
>>>>>
>>>>> Best,
>>>>> Bin
>>>>>
>>>>
>>>
>>>
>>>
>>> ----------------------------------------------
>>>
>>> Ils sont fous ces Romains
>>>
>>>
>>
>>
>>
>> ----------------------------------------------
>>
>> Ils sont fous ces Romains
>>
>>
>
>
>
> ----------------------------------------------
>
> Ils sont fous ces Romains
>
>
Received on Fri Oct 19 2007 - 18:45:15 CEST