{ TFile *myFile = new TFile("helamp.root","READ"); myFile->ls(); TCanvas *myCanvas = new TCanvas("c","partwave2",0,0,800,800); myCanvas->Divide(2,2); TH1F *th1=h1; TF1 *f1=new TF1("f1", "[0]*(1.0+[1]*x+[2]*x*x)/(2+[2])",-1.0,1.0); myCanvas->cd(1); th1->Fit("f1"); TH1F *th2=h2; TF1 *f2=new TF1("f2", "[0]*(1.0+[1]*x+[2]*x*x)/(2+[2])",-1.0,1.0); myCanvas->cd(2); th2->Fit("f2"); myCanvas.Update(); myCanvas->Print("helamp.eps"); }