%jsroot on

#include "Riostream.h"
#include "TString.h"
#include "TFile.h"
#include "TTree.h"
#include "TSystem.h"
#include <stdio.h>
#include <stdlib.h>

//This two lines can be commented out. You just need it once, and in case the CVS file was not provided already
system("rm outreach.csv");
system("wget http://opendata.atlas.cern/visualisations/CrossFilter/outreach.csv");

//If the file is downloaded with the line above, you *need* to remove the first line of the outreach.csv

TString dir = gSystem->UnixPathName(__FILE__);
dir.ReplaceAll("outreach.C","");
dir.ReplaceAll("/./","/");

TFile *f = new TFile("outreach.root","RECREATE");

TTree *tree = new TTree("ntuple","data from csv file");
// The file inside has ---->   type,  Channel,  NJets,  MET,  Mll,  LepDeltaPhi,  METLLDeltaPhi,  SumLepPt,  BTags,  weight
tree->ReadFile("outreach.csv","type/I:Channel/I:NJets/I:MET/F:Mll/F:LepDeltaPhi/F:METLLDeltaPhi/F:SumLepPt/F:BTags/F:weight/F",',');
f->Write();

system("ls -lhrt outreach.*");

TFile *_file0 = TFile::Open("outreach.root");

TCanvas *c3D = new TCanvas("c3D","c3D",10,10,400,400);
ntuple->Draw("MET:Mll:LepDeltaPhi","MET>0.");
c3D->Draw();

TCanvas *cz = new TCanvas("cz","cz",10,10,400,400);
ntuple->Draw("Mll:MET","weight>-999","colz");

cz->Draw();

TCanvas *c2D = new TCanvas("c2D","c2D",10,10,400,400);
ntuple->Draw("Mll:LepDeltaPhi","MET>0.","colz");
c2D->Draw();