Reading a root file

ROOT
1

Dear all,

I would like to read a root file in my analysis. Basically I want, in each event, read the content of a bin of one of the histograms. So far what I am doing is:

Open the file and read all the histograms that I need in Begin() but when access the contents of the bins in Process() is giving me a segmentation fault, so I was wondering if this is the correct way to do it.

Thanks in advance

Esteban

2

Hi,

You should open the file and load the histogram in SlaveBegin().
Remember to not close the file while you are using the histogram (unless you made a clone); the best is to close it in SlaveTerminate.

Anyhow, if you do not manage, post an example of code.

G. Ganis