[ROOT] Weighting with function

From: Minjeong Kim (mjkim@fnal.gov)
Date: Thu May 04 2000 - 04:15:32 MEST


Hello,

I have a problem to weight my histogram with function. I work with ROOT
23/11 and KCC. My function is third polynomial function with four
parameters.

A0 : 0.8409, A1 : 0.5085, A2 : 0.1611, A3 : -383.4

Also I use several cut definitions :

TCut EVNT = "(nsgl<1)&&(nsgl==1)" ;
TCut CMUP = "(sgltyp1==20)&&(detcmuo==3)" ;

My first question is whether this is possible in present ROOT version 
or not. If this is possible, how?

My histogram is filled from ntuple and pt is one of variables of my
ntuple. I hoped next line worked, but it's not. I can feel this is 
wrong, but actually I don't know how to fix.

h400->Draw("taupt>>histogram",
 "(0.8409+0.5085/pt+0.1611/(pt)**2-383.4/(pt)**3)"*(EVNT&&CMUP),"goff");

Can you give me some advice?
Thanks in advance.

Min Jeong
================================
 Min Jeong Kim (CDF/KHCL)
     E-mail : mjkim@fnal.gov    
     Office : CDF 137-B (X8473)  
================================



This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:24 MET