I had been having problem in creating root file;
I have been using given code to create tree and root file,
current_ntuple.C (656 Bytes)
Thank You.
I had been having problem in creating root file;
I have been using given code to create tree and root file,
current_ntuple.C (656 Bytes)
Thank You.
And what is the problem?
You macro is:
void current_ntuple()
{
TFile *f = new TFile("filt.root","RECREATE"); // create the root file
TTree *T = new TTree("curr","data from txt file"); //create the tree for current
Long64_t nlines = T->ReadFile("JanToMar_11am.txt","Current");//read the file, creating names for the branches
printf(" found %lld points\n", nlines);
T -> Write(); //write data onto root file
f -> Close();
}
To run it we are missing the file JanToMar_11am.txt
.
BTW. Instead of “f->Close();
”, use: delete f; // automatically deletes T, too