[ROOT] MakeClass

From: nancyk@mit.edu
Date: Wed Jul 10 2002 - 18:52:14 MEST


I'm trying to create a class using MakeClass (following the example in the 
User's Guide, page 274), and the following commands show this:

root [0] TFile *f = new TFile ("PhRot31.root");
root [1] f->ls();
TFile**         PhRot31.root
 TFile*         PhRot31.root
  KEY: TNtuple  rt_NTuBegin;1   Initial Beam
  KEY: TNtuple  RTTraces0;1     Trace for Event 0 
  KEY: TNtuple  RTTraces1;1     Trace for Event 1 
  KEY: TNtuple  RTTracRefPart2;1        Trace for Refrence particle
  KEY: TNtuple  rt_NTu0;1        Sol Grid,  Period 0 
  KEY: TNtuple  rt_NTu1;1        Sol Grid,  Period 1 
  KEY: TNtuple  rt_NTu2;1        Sol Grid,  Period 2 
  KEY: TNtuple  rt_NTu3;1        Sol Grid,  Period 3 
  KEY: TNtuple  rt_NTu4;1        Sol Grid,  Period 4 
  KEY: TNtuple  rt_NTu5;1        Sol Grid,  Period 5 
  KEY: TNtuple  rt_NTu6;1        Sol Grid,  Period 6 
  KEY: TNtuple  rt_NTu7;1        Sol Grid,  Period 7 
  KEY: TNtuple  rt_NTu8;1        Sol Grid,  Period 8 
  KEY: TNtuple  rt_NTu9;1        Sol Grid,  Period 9 
  KEY: TNtuple  rt_NTu10;1       Sol Grid,  Period 10 
  KEY: TNtuple  rt_NTu11;1       Sol Grid,  Period 11 
  KEY: TH1F     TestBx;1        Bx at X = 0 , Y = 0, ZAver = 110000 
  KEY: TH1F     TestBy;1        By ar X = 0 , Y = 0, ZAver = 110000 
  KEY: TH1F     TestBz;1        Bz vs Z at X = 0 , Y = 0, ZAver = 110000

In the example given, they generate a class from a tree. Since I don't see a 
tree in the list above, but I know that I want the loop created to loop through 
the ntuples listed above, do I need to create a tree from these ntuples before 
I can run the tree->MakeClass("MyClass") command? If so, how? 

Thank you,
Nancy Keuss



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