I’m creating a small tree from a big one in the following way: I have a list of the events that I want to put in a new tree. The event is identified from 3 number. In the attachment the list is the file “event_dump.out”
So each event in the list I loop on the tree until find the event and save it into a new tree.
But I find out that the variables that were supposed to have the values from the branches (via TTree::SetBranchAddress()) are empty
In side my tar.gz attached there is the file “MakeTreeFromDump.cc” that run all the program. The file “treefromdump.cc” creates the new tree, and also have a line code which sends the values read from the big tree to a file.
You also need the root tree that can be accessible in:
I use root version 5.10/00 on a SLC 4
Tell me please what can be wrong?
Make_tree_from_dump.tar.gz (1.38 KB)