void TTree_test()

{
	gROOT->Reset();
	TCanvas *c1 = new TCanvas();
	
	TFile *f = new TFile("data1.root","RECREATE");
	TH1F *h1 = new TH1F("g1","x distribution",100,-4,4);
	TTree *T = new TTree("ntuple","data from ascii file");
    Long64_t nlines = T->ReadFile("2019-06-03_13-36-14_60minutos.txt","a1/I:a2/I:a3/I:a4/I:a5/I:a6/I");
   
    T->SetLineWidth(2);
    T->SetMarkerStyle(7);
    T->SetMarkerColor(kRed);
    T->SetTitle("Coincidences");

   printf("found %lld pointsn",nlines);
   T->Draw("a3"," a4 && a6 && a3");
    //gPad->SetLogy();
    
    T->Write();

}