First of all, hello. I am almost new here and besides I have been working around with Root a little bit I have almos never came here.
Today I have a question which I couldn’t find the answer for. It is the first time I am working with TTrees and i would like to create a tree with branches which are vectors or vectors of vectors. What I do is what I saw in an example which I cannot find the link now.
Create the TTree and branch
TTree *t = new TTree(“t”, “Test TTree”);
vector v;
t->Branch(“v”,&v)
Do some code to give value to v and Fill
t->Fill();
I have also crated a TFile. I do t->Write() before ending the program.
When I do this with int, doubles, etc. I have no problem to create a new TTree but when I try to do this with vectors lots of errors came out and some files are auto created with this name
AutoDict_vector_vector_int_allocator_int______cxx_ACLiC_dict.cxx
or something similar. I think it has to be with dictionaries but I don’t know exactly what these dictionaries are and how to work with them. I have been looking around but what I have found seems a little bit harder that what I think is needed in order to solve this problem.
Can someone give me some idea on how to create these branches and finally create the TTree?
Thank you so much!
