# include "TFile.h"
# include "TH1F.h"
# include "TChain.h"
# include "Riostream.h"
 
void addspecs2() 
{  
   //Create the calibrated histograms 
   //Int_t ADCmax = 2700; //maximum value for calibrated ADC2&3
   //Int_t ADCmax1 = 8192; //maximum value for calibrated ADC1
   Int_t nbins = 8192; // or whatever you want, eg ADCmax 
   TFile *fout = new TFile("/Users/ew/AProg/ROOT1/Data/s00074/SUMhistos74.root","recreate"); 
   
   TH1F *hADC1 = new TH1F("hADC1","calibrated ADC1",nbins, 0, nbins); 
   TH1F *hADC2 = new TH1F("hADC2","calibrated ADC2",nbins, 0, nbins); 
   TH1F *hADC3 = new TH1F("hADC3","calibrated ADC3",nbins, 0, nbins); 
   //TH1F *hADC4 = new TH1F("hADC4","calibrated ADC4",nbins,0,ADCmax); 

   //set your calibration constants 1=ADC1, 2=ADC2, 3=ADC3
   //Double_t konst1 =  
   //Double_t M1 =  
   Double_t konst2 = 0.3298;  
   Double_t M2 = -14.046;
   Double_t konst3 = 0.3348;
   Double_t M3 = 30.086;

   // Chain all the data files.
   TChain *chain = new TChain("data"); //data is the name of the TTree object in the files added with Add
   chain->Add("/Users/ew/AProg/ROOT1/Data/s00074/s00074_001.root"); 
   chain->Add("/Users/ew/AProg/ROOT1/Data/s00074/s00074_002.root"); 
   chain->Add("/Users/ew/AProg/ROOT1/Data/s00074/s00074_003.root"); 
   chain->Add("/Users/ew/AProg/ROOT1/Data/s00074/s00074_004.root"); 
 
   Int_t TimeStamp; 
   Short_t ADC1, ADC2, ADC3, ADC4; 
   //chain->SetBranchAddress("TimeStamp",&TimeStamp); 
   chain->SetBranchAddress("ADC1",&ADC1); 
   chain->SetBranchAddress("ADC2",&ADC2); 
   chain->SetBranchAddress("ADC3",&ADC3); 
    
   //loop on all entries and fill the calibrated histograms 
   Long64_t nentries = chain->GetEntries(); 
   for (Long64_t i=0;i<nentries;i++) 
   { 
      chain->GetEntry(i); 
      hADC1->Fill(ADC1); 
      hADC2->Fill(konst2*ADC2+M2); 
      hADC3->Fill(konst3*ADC3+M3); 
      //hADC4->Fill(konst4*ADC4+M4);    
   } 
   
   //save in memory histograms to their host file 
   fout->Write(); 
   delete fout; 
}