Codes for trip dac scan. Works for three data files.

Trim_dac_scan/trimdac_scan.cpp

+void trimdac_scan(){
+  std::vector<TH1D*>histo;
+  std::vector<std::string>filenames={
+    std::string("dacs0x0_bl_thr.dat"),
+    std::string("dacs0x1_bl_thr.dat"),
+    std::string("dacs0x2_bl_thr.dat"),
+    std::string("dacs0x3_bl_thr.dat"),
+    std::string("dacs0x4_bl_thr.dat"),
+    std::string("dacs0x5_bl_thr.dat"),
+    std::string("dacs0x6_bl_thr.dat"),
+    std::string("dacs0x7_bl_thr.dat"),
+    std::string("dacs0x8_bl_thr.dat"),
+    std::string("dacs0x9_bl_thr.dat"),
+    std::string("dacs0xA_bl_thr.dat"),
+    std::string("dacs0xB_bl_thr.dat"),
+    std::string("dacs0xC_bl_thr.dat"),
+    std::string("dacs0xD_bl_thr.dat"),
+    std::string("dacs0xE_bl_thr.dat"),
+    std::string("dacs0xF_bl_thr.dat")
+  };
+  std::vector<int>colors={kTeal+3,kPink-3,kOrange+8,kRed+4 ,kCyan+2,kMagenta+1,kGreen-3,kPink-6,kBlue+3,kYellow+3,kPink+2,kBlue-6,kRed-1,kYellow-5,kRed-8,kAzure};
+  double data;
+  TCanvas*c1 = new TCanvas();
+  THStack*hs = new THStack("hs", "Trim dac scan");
+  
+  for(int ctr=0;ctr<17;ctr++){
+    std::ifstream datafile(filenames.at(ctr).c_str());
+    std::string histo_name = "h"+ filenames.at(ctr);
+    TH1D* h1= new TH1D(histo_name.c_str(),"Trim dac scan", 175,950,1300);
+    
+    if(datafile.is_open()){
+      cout<<" The data file "<<filenames.at(ctr) << " is opened ..."<<std::endl;
+      
+      while(!datafile.eof()){
+	
+	datafile>>data;
+	//	cout<<data<<std::endl;
+	h1->Fill(data);
+      }
+      h1->SetLineColor(colors.at(ctr));
+      histo.push_back(h1);
+      cout<<filenames.at(ctr)<<"histogram is filled..."<<std::endl;
+    }
+    //datafile.close();
+  }
+  
+  cout<<"size of the histo vector is "<<histo.size()<<std::endl; 
+  
+ 
+  for(int i=0;i<histo.size();i++){
+    cout<<"stacking"<< histo.at(i)<<std::endl;
+    hs->Add(histo.at(i),"sames");
+  }
+  hs->Draw("hist nostack");
+  hs->GetXaxis()->SetTitle("Threshold [LSB]");
+  hs->GetYaxis()->SetTitle(" #pixels");
+
+  cout<<"Done.."<<std::endl;
+}
+
+    
+      
+    
+    
+      
+