RE: [ROOT] meaning of ntuple->Draw("a","b")

From: Philippe Canal (pcanal@fnal.gov)
Date: Fri Apr 05 2002 - 21:46:13 MEST


Hi Ahmet,

The 2nd argument is actually a 'weight'. So
	ntuple->Draw("a","b") 
plots "a*b" if b is non-zero.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Ahmet Sedat Ayan
Sent: Friday, April 05, 2002 1:30 PM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] meaning of ntuple->Draw("a","b")




Hi Rooters,

What is meaning of the following if we have an ntuple with variables, a,
b, c,.. etc ?  Can I take it as <<Draw "a" if b is non-zero>> ?

ntuple->Draw("a","b") 

cheers,
ahmet

***************

Ahmet Sedat Ayan		

Physics & Astronomy Dept.
Van Allen Hall    
University of Iowa
Iowa City, IA, 52242
  
Voice      : (++ 1 319) 335-1941 (W) (GMT-6)      
Occupation : Ph.D Candidate (But still dreamer!)	
e-mail     : ayan@cms.physics.uiowa.edu
web        : http://jazz.physics.uiowa.edu/~ayan



This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:48 MET