Loading multiple Trees

ROOT
1

Hi,
I am trying to read multiple trees into a macro with the same structure but
I want to use the two trees for different analyses is this possible or is TChain the only
option??

thanks

maki

2

Not clear what you want to do. Use TChain to process multiple files with the same tree structure.

Rene

3

So Ive tried to read multiple files using the following macro but it seems to be having problems reading the tree?
any suggestions

thanks
Maki
Final_Results.C (893 Bytes)

4

A TChain supports only ROOT files, not text files. Where is your Tree ?

Rene

5

Sorry the files are read in from the txt files

eg, list_null_0mp.txt, contains :
/import/reines1/maki/data/null_0mp_1.root
/import/reines1/maki/data/null_0mp_3.root
/import/reines1/maki/data/null_0mp_2.root
/import/reines1/maki/data/null_0mp_4.root

they seem to be loaded but when I try to read them it doesn’t seem to work
thanks

maki

6

Could you post the shortest possible RUNNING script explaining/reproducing your problem? (and also data files in a public readable site)

Rene