Hello Rooters,
i got plenty of root-files with two trees each: event and header. I must
have two because in the header i got numbers which are calculated during
production of the file so header is written at the end of writting a file.
I would like to analyse these files in a chain. So i'd like to create a
TChain. But a single TChain is a chain of one kind of tree objects eg.
TChain data("data");
And i need information from header also. If i got one file, i do
AddFriend and use variables from header. But how to proceed in my case?
And i got 10000 records in event and one in header (per run).
Maybe i can analyse files somehow in the loop? But how to do this?
Regards,
Mariusz Sapinski
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:51:12 MET