Tow graph

ROOT
1

I want to superimpose two graphs

first
TFile *f= new TFile(“f/f01.root”);
hprof = new TProfile(“hprof”,“Profile of e versus a”,20,-100,100,0,100.);

second

vInput.open(Form("%sfile.dat",dir.Data()));
gr2 = new TGraph(vNData,x1,y1);
gr2->Draw(“ACP”)

when I write the script, I have just garph n2 of file.dat gr2

my script ***************************************************

#include <stdio.h>

#include <TROOT.h>

#include <fstream.h>

#include <iostream.h>

TGraph   *gr2 ;

void profhit(){

gROOT->Reset();

gROOT->Time();
Float_t x,y,z,alpha;

gStyle->SetTitleFontSize(0.03);
gStyle->SetPalette(1);


TFile *f= new TFile("f01.root");



Hits->SetBranchAddress("x",&x);
Hits->SetBranchAddress("y",&y);
Hits->SetBranchAddress("z",&z);
Hits->SetBranchAddress("alpha",&alpha);


TCanvas* c1= new TCanvas("c1","",600);

hprof = new TProfile("hprof","Profile of alpha versus y",20,-100,100,0,100.);


Int_t nentries=(Int_t)Hits->GetEntries();

for (Int_t i=0;i<nentries;i++)
    { 
      Hits->GetEntry(i);


      hprof->Fill(y,alpha);

hprof->Draw();

   }
ofstream sortie;///  pb I have not in sortie

sortie.open("alpha.txt",ios::out);
for (y=0;y<200;y++)

    {    

         sortie<<alpha[y]<<" "<<alpha[y]<<endl;           

      } 



sortie.close();

TString dir = gSystem->UnixPathName(gInterpreter->GetCurrentMacroName());
   dir.ReplaceAll("alpha.C","");
   dir.ReplaceAll("/./","/");
Double_t *x1 = new Double_t[400];
   Double_t *y1 = new Double_t[400];
   Double_t vX1, vY1;
   Int_t vNData = 0;
   ifstream vInput;
   vInput.open(Form("%sfile.dat",dir.Data()));
   while (1) {
      vInput >> vX1 >> vY1;
      if (!vInput.good()) break;
      x1[vNData] = vX1;
      y1[vNData] = vY1;
      vNData++;
   }//while
   vInput.close();
   gr2 = new TGraph(vNData,x1,y1);
gr2->SetMarkerColor(kRed);
   gr2->SetMarkerStyle(20);
   

   gr2->Draw("ACP");

}
2

The first graph should be using with the option “A”. Then to superimpose the other graphs on the fisrt one you should not use the option A (meaning “draw the Axis”) but only the option “CP”.