Difference: HUSUSYRoot (2 vs. 3)

Revision 32009-06-29 - AnitaKapusi

Line: 1 to 1
 
META TOPICPARENT name="SusySearch"

How to use Root:

Line: 11 to 11
  TFile *_file0 = TFile::Open("..... .root")
File browser:
Changed:
<
<		 TBrowser < name >
>
>		 TBrowser < name >
 
List the directories:
Changed:
<
<		.ls
 < directory name >.cd()
>
>		.ls
< directory name >.cd()
 
Print the tree:
Changed:
<
<		< ntuplename >.Print()
>
>		< ntuplename >.Print()
 
Scan the tree:

< ntuplename >.Scan("< name of a Branch >.< name of a leaf >")

Make a new histogram:
Changed:
<
<		TH1F * = new TH1F ("name","",#ofXaxis,#ofYaxis,#ofBins);
>
>		TH1F *< name_of_the_histogram > = new TH1F ("< name >","",< #ofXaxis >,< #ofYaxis >,< #ofBins >);
 
Make a new canvas:
Changed:
<
<		TCanvas *c1=new TCanvas ("name","",1);
>
>		TCanvas *< c1 >=new TCanvas ("< name >","",1);
 
Draw a histogram:
Changed:
<
<		name of the tree in the file.Draw("name of a Branch.name of a leaf")
>
>		< name of the tree in the file >.Draw("< name of a Branch >.< name of a leaf >") 2D histogram:
< name of the tree in the file >. Draw("< name of a Branch1 >.< name of a leaf1 >:< name of a Branch2 >.< name of a leaf2 >")
 
Changed:
<
<		2D histogram:
name of the tree in the file.Draw("name of a Branch1.name of a leaf1:name of a Branch2.name of a leaf2")
>
>		histogram with cut criteria:
< name of the tree in the file >.Draw("< name of a Branch1 >.< name of a leaf1 >,< name of a Branch2 >.< name of a leaf2 >< cut criteria>")
 
Changed:
<
<		histogram with cut criteria:
_name of the tree in the file.Draw("name of a Branch1.name of a leaf1,name of a Branch2.name of a leaf2 cut criteria")_
>
>		draw two histogram in one canvas:
< name of the tree in the file >.Draw("< name of a Branch1 >.< name of a leaf1 >")
 
Changed:
<
<		draw two histogram in one canvas:
< name of the tree in the file>.Draw(".")

.Draw(". ","","SAME")
e.g.:
tree.Draw("pelectron_1.tight: pelectron_1.loose ","pelectron_1.tight>-1")

>
>		 < name of the tree in the file >.Draw("< name of a Branch2 >.< name of a leaf2 > ","","SAME")
e.g.:
tree.Draw("pelectron_1.tight: pelectron_1.loose ","pelectron_1.tight>-1")
 
Open an AOD file in root:
Line: 51 to 49
 void Chain(){
TChain tree("stopAnaMod/tree");
tree.AddFile("stopAnaNtuple_noselection_Chowder_00.root");
tree.Draw("event");
}
Save a histogram to .eps:
Changed:
<
<		TCanvas *=new TCanvas ("","",1);
>
>		TCanvas *c1=new TCanvas ("","",1);
  .Draw(".")
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