ROOT NTuple Analysis using MakeClass

For NTuple analysis ROOT provides a MakeClass command that produces analysis skeleton. Assuming you have an analysis file myfile.root containing one tree CollectionTree NTuple analysis skeleton is created like this:

>root myfile.root
>CollectionTree->MakeClass("an_skeleton_name")    //produces .h and .C files

Analysis can be implemented in the an_skeleton_name::Loop method which loops over all entries. For efficiency comment out the branches and variables in the an_skeleton_name.h and an_skeleton_name.C files you're not using.

-- LizaMijovic - 28 Oct 2008