[ROOT] Superimposing histograms

From: Dennis C. Arrogancia (dennis@physics.msuiit.edu.ph)
Date: Tue Jan 29 2002 - 09:13:21 MET

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Dear ROOTERS,

I have 4 different files say f1.root, f2.root, f3.root, and f4.root.
Each file contains three trees, "T1","T2", and "T3". I want to compare it
by superimposing the variables in each of the trees from the 4 files and
draw it in a histogram. How can i do it? Can anyone give me an example?


dennis

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