void dosa() {
   double v1,v2,v3,v4,v5,v6,v7;

   TTree *t = new TTree("T", "T");

   t->Branch("v1",  &v1,  "v1/D");
   t->Branch("v2",  &v2,  "v2/D");
   t->Branch("v3",  &v3,  "v3/D");
   t->Branch("v4",  &v4,  "v4/D");
   t->Branch("v5",  &v5,  "v5/D");
   t->Branch("v6",  &v6,  "v6/D");
   t->Branch("v7",  &v7,  "v7/D");


   FILE *fp = fopen("dosa.dat","r");   int c0=0, m0=0;
   char line[128];

   while (fgets(line, 128, fp)) {
      sscanf(&line[0],"%lg %lg %lg %lg %lg %lg %lg",&v1,&v2,&v3,&v4,&v5,&v6,&v7);
      t->Fill();
   }

t->Scan();
   t->Draw("v2:v1", "", "L");

}