void ERes() 
{
  TGraph *ERes = new TGraph();
  
  TGraph* gr1 = new TGraph("ER.txt", "%lg %lg %*lg %*lg %*lg");
  TGraph* gr2 = new TGraph("ER.txt", "%lg %*lg %lg %*lg %*lg");
  TGraph* gr3 = new TGraph("ER.txt", "%lg %*lg %*lg %lg %*lg");
  TGraph* gr4 = new TGraph("ER.txt", "%lg %*lg %*lg %*lg %lg");
    
  gr1->SetMarkerStyle(1);gr1->Draw("ap");
  gr2->SetMarkerStyle(4);gr2->Draw("ap");
  gr3->SetMarkerStyle(4);gr3->Draw("ap");
  gr4->SetMarkerStyle(4);gr4->Draw("ap"); 
  
}