codes for all the pixels, not yet working

gain_measurement.cpp

+double xmin=850.0,xmax = 1750.0,nbins=450.0;
+
 /////////////////////////////////////////////////////////////
 // The function fit_1d sets the cosmetics for the histograms/
 // and fits the histogram with modified erf function.       /
@@ -47,8 +49,8 @@ TH1D *fit_1d(TH1D* &hist_255,int colors,int markers,int &amplitude,double fitmin
 
 std::vector<TH1D*> gain_measurement(int i, int j)
 {
-  int x,y, nbins = 450;
-  double xmin=850.0,xmax = 1750.0;
+  int x,y;
+  //double xmin=850.0,xmax = 1750.0;
 
   std::vector<int>colors={kAzure,kTeal+3,kViolet+3};
   std::vector<int>markers={2,3,5};
@@ -63,16 +65,23 @@ std::vector<TH1D*> gain_measurement(int i, int j)
 	    << std::setw(3) << std::setfill('0') << j <<".dat";
   std::cout << sfilename.str() << std::endl;
   amp03.open(std::string("amp03/" + sfilename.str()).c_str());
-  amp02.open(sfilename.str().c_str());
-  amp01.open(sfilename.str().c_str());
-    
+  amp02.open(std::string("amp02/" + sfilename.str()).c_str());
+  amp01.open(std::string("amp01/" + sfilename.str()).c_str());
+
 
   if(amp03.is_open())
     {
-      cout<<"The data file 255_255 is opened..."<<std::endl;
-      TH1D *h3 = new TH1D("h3","Threshold gain measurement",nbins,xmin,xmax);
+      cout<<"The data file " << i << "_"<< j << " is opened..."<<std::endl;
+
+      TH1D *h3 = (TH1D*)gROOT->FindObject("h3");
+      delete h3;//to prevent memomory leak
+      h3 = new TH1D("h3","Threshold gain measurement",nbins,xmin,xmax);
       hist_255.push_back(h3);
 
+      amp03.clear();
+      amp03.seekg(118 ,std::ios_base::beg);
+
+
       while(!amp03.eof())
 	{
 	  // cout<<"The values from the file amp03 is extracted..."<<std::endl;
@@ -89,9 +98,15 @@ std::vector<TH1D*> gain_measurement(int i, int j)
 
   if(amp02.is_open())
     {
-      cout<<"The data file 255_255 is opened..."<<std::endl;
-      TH1D *h2 = new TH1D("h2","Threshold gain measurement",nbins,xmin,xmax);
+      cout<<"The data file" << i << "_" << j << " is opened..."<<std::endl;
+
+      TH1D *h2 = (TH1D*)gROOT->FindObject("h2");
+      delete h2;
+      h2 = new TH1D("h2","Threshold gain measurement",nbins,xmin,xmax);
       hist_255.push_back(h2);
+
+      amp02.clear();
+      amp02.seekg(118 ,std::ios_base::beg);
       while(!amp02.eof())
 	{
 	  amp02>>x>>y;
@@ -107,8 +122,15 @@ std::vector<TH1D*> gain_measurement(int i, int j)
   if(amp01.is_open())
     {
       cout<<"The data file " << i << "_" << j << " is opened..."<<std::endl;
-      TH1D *h1 = new TH1D("h1","Threshold gain measurement",nbins,xmin,xmax);
+
+      TH1D *h1 = (TH1D*)gROOT->FindObject("h1");
+      delete h1;
+      h1 = new TH1D("h1","Threshold gain measurement",nbins,xmin,xmax);
       hist_255.push_back(h1);
+
+      amp01.clear();
+      amp01.seekg(114 ,std::ios_base::beg);
+
       while(!amp01.eof())
 	{
 	  amp01>>x>>y;
@@ -141,14 +163,22 @@ std::vector<TH1D*> gain_measurement(int i, int j)
   return hist_255;
 }
 
-void complete_plot()
+void gain_measurement()
 {
+  TH1D *hist_final = new TH1D("hist_final","Threshold gain  measurements",nbins,xmin,xmax);
+  std::vector<TH1D*>histograms;
+  
   for(int row=0;row<256;row++)
     {
       for(int col=0;col<256;col++)
 	if(row==col)
 	  {
-	    auto histograms = gain_measurement(row,col);
+	    histograms.push_back(gain_measurement(row,col));
+	    for(int i=0;i<histograms.size();++i)
+	      {
+		hist_final->Fill(histograms.at(i)) ;
+		hist_final->Draw();
+	      }
 	  }
     }
 }