Hi all,
When I am trying to save things in a TTree that I have created I am finding that it the values are not saved in the same order that they are put in there.
what I do:
{
#include <vector>
std::vector<float> Angle;
TFile* f= new TFile("SomeFile.root","RECREATE");
TTree* MyTree = new TTree("MyTree","Blah");
MyTree->Branch("Angle",&Angle,"Angle/F");
for (int i=0;i<Nevents;i++)
{
Angle.clear();
\\DO SOME STUFF TO CALCULATE "Angle"
Angle.push_back(somevalue);
MyTree->SetBranchAddress("Angle",&Angle[0]);
MyTree->Fill();
}//end of loop over events
MyTree->Write();
}//end of whole thing
And then when i go back and I make a plot of the calculated angle and the angle that I stored on my tree, I find that most of the time they agree, but sometimes they do not.
Did I have to do something extra to make sure that the angles are stored in the appropriate order?
thanks,
J