Re: TTree Draw 5 variables

Thank you!
It works.

     Andrea

On 10/01/2010 03:32 PM, Rene Brun wrote:
> Andrea,
>
> You are right. Currently you have to do something like:
> T.Draw("x:y:z:u:v","","para goff");
> T.GetVal(4);
>
> Hoping that we can improve this soon.
>
> Rene Brun
>
> Andrea Massironi wrote:
>> Dear Rooters,
>> I'm wondering if it's possible to use the "Draw" of a TTree with
>> 5 variables with the "goff" option and then get the results with
>> "GetVal(Int_i i)", like in the following example.
>>
>> I get the following error:
>>
>> Error in <TSelectorDraw::Begin>: Too many variables. Use the
>> option "para", "gl5d" or "candle" to display more than 4 variables.
>>
>> even if in http://root.cern.ch/root/html/TTree.html I read
>> "Giving more than 4 variables without the option=para or
>> option=candle or option=goff will produce an error."
>> But "goff" seems to be an available option.
>>
>>
>> Thanks,
>> Andrea
>>
>>
>>
>> TTree* myTree = new TTree("myTree","myTree");
>>
>> double x,y,z,t,w;
>>
>> myTree->Branch("x",&x,"x/D");
>> myTree->Branch("y",&x,"y/D");
>> myTree->Branch("z",&x,"z/D");
>> myTree->Branch("t",&x,"t/D");
>> myTree->Branch("w",&x,"w/D");
>>
>>
>> for (int i=0; i<100; i++){
>> x = i;
>> y = i+1;
>> z = i+2;
>> t = i+3;
>> w = i+4;
>> myTree->Fill();
>> }
>>
>>
>> myTree->Draw("x:y:z:t:w","","goff");
>>
>> Double_t *vX = myTree->GetVal(0);
>> Double_t *vY = myTree->GetVal(1);
>> Double_t *vZ = myTree->GetVal(2);
>> Double_t *vT = myTree->GetVal(3);
>> Double_t *vW = myTree->GetVal(4);
>>
>>
>
Received on Fri Oct 01 2010 - 15:44:37 CEST