Error bar of a histogram in a Ttree object

I have working on the histograms of a Ttree object(by setting a THistogran pointer to the tree). My question is, how can you obtain the error bar of the histo and display the errror bar along with the original histograms?
It would be best if you can point out some reference I can read as I am new to the root program.
Thanks a lot!!!


This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.