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  1. #include "TROOT.h"
  2. #include "TFile.h"
  3. #include "TBenchmark.h"
  4. #include "TH1F.h"
  5. #include "TH2F.h"
  6. #include "TH3F.h"
  7. #include "TCanvas.h"
  8. #include "TStyle.h"
  9. #include "TPad.h"
  10. #include "TF1.h"
  11. #include "TGraph.h"
  12. #include "TSpectrum.h"
  13. #include "stdio.h"
  14. #include "THStack.h"
  15. #include "TPaveText.h"
  16.  
  17. #include "include/RTUtil.h"
  18.  
  19. double getNoise(TH2F*, int, int);
  20.  
  21. int biasScan(char filename[256] = "test", char plopt[256]="th", int chXstart=0, int chXend=7, double par1=0.0, double par2=0.0, bool debug = false)
  22. {
  23.   const int c_nChannels = 64;
  24.   const double c_xOffset = 0; // mm
  25.   const double c_yOffset = 0;
  26.  
  27.   int map[8][8]={{32,34,53,55,40,42,61,63},
  28.                  {48,50,37,39,56,58,45,47},
  29.                  {33,35,52,54,41,43,60,62},
  30.                  {49,51,36,38,57,59,44,46},
  31.                  {17,19,4,6,25,27,12,14},
  32.                  {1,3,20,22,9,11,28,30},
  33.                  {16,18,5,7,24,26,13,15},
  34.                  {0,2,21,23,8,10,29,31}
  35.                 };
  36.                
  37.   // Set draw style              
  38.   RTSetStyle(gStyle);
  39.  
  40.   // open the file with histograms
  41.   char fnameroot[256];
  42.   TFile* rootfile;
  43.         sprintf(fnameroot, "root/%s.root", filename);
  44.         rootfile = (TFile *) gROOT->FindObject(filename);
  45.         if(rootfile==NULL) rootfile = new TFile(fnameroot);
  46.         if(rootfile==NULL) {
  47.           printf("Cannot open root file %s!!!\n",fnameroot);
  48.           return(0);
  49.         }
  50.  
  51.   if(strstr(plopt, "tdc") != NULL) {
  52.     TCanvas *canvas21 = new TCanvas("canvas21","canvas21",1600,800);
  53.     TH3F* h0 = (TH3F*) rootfile->Get("h_correctedTDC");
  54.           Int_t binsX = h0->GetXaxis()->GetNbins();
  55.     Int_t minX  = h0->GetXaxis()->GetFirst();
  56.     Int_t maxX  = h0->GetXaxis()->GetLast()+1;
  57.     Int_t binsY = h0->GetYaxis()->GetNbins();
  58.     Int_t minY  = h0->GetYaxis()->GetFirst();
  59.     Int_t maxY  = h0->GetYaxis()->GetLast()+1;
  60.     Int_t binsZ = h0->GetZaxis()->GetNbins();
  61.     Int_t minZ  = h0->GetZaxis()->GetFirst();
  62.     Int_t maxZ  = h0->GetZaxis()->GetLast()+1;
  63.     Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
  64.     Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
  65.     Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
  66.     Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
  67.    
  68.     canvas21->Divide(2);
  69.     //h0->Draw();
  70.     canvas21->cd(1);
  71.     //h0->Project3D("xy")->Draw("colz");
  72.     //canvas21->cd(2);
  73.     //h0->Project3D("yz")->Draw("colz");
  74.     //canvas21->cd(3);
  75.     TH2D* h_correctedTDC = (TH2D*) h0->Project3D("xz");
  76.     //h0->GetZaxis()->SetRangeUser(-5,5);
  77.     //h0->Project3D("xzo")->Draw("colz");
  78.     //h_correctedTDC->SetTitle("; t [ns]; Channel");
  79.     h_correctedTDC->Draw("colz");
  80.     /*
  81.     TH1F* tdc1 = new TH1F("tdc1",";TDC [ns];Events",binsZ, minZ, maxZ);
  82.     //for(int j=minY; j<maxY; j++) {
  83.       for(int k=minZ; k<maxZ; k++) {
  84.         double signal = h0->GetBinContent(1,1,k);
  85.         tdc1->Fill(k,signal);
  86.         //}
  87.         }
  88.     tdc1->Draw();
  89.     */
  90.    
  91.     TH2D* h_timeWalk = (TH2D*) h0->Project3D("zy");
  92.     canvas21->cd(2);
  93.     //h_timeWalk->SetTitle(";Threshold [V]; t [ns]");
  94.     h_timeWalk->Draw("colz");
  95.   }
  96.  
  97.   if (strstr(plopt, "bias") != NULL) {
  98.     TCanvas* canvas01 = new TCanvas("canvas01","",800, 800);
  99.     canvas01->cd();
  100.     TH2F* h_bias = (TH2F*) rootfile->Get("h_bias");
  101.     h_bias->Draw("colz");
  102.  
  103.     TCanvas* canvas02 = new TCanvas("canvas02","",800, 800);
  104.     //canvas02->Divide(2,2);
  105.     canvas02->cd();
  106.     TH3F* h_biasThreshold = (TH3F*) rootfile->Get("h_biasThreshold");
  107.     //h_biasThreshold->Draw();
  108.     //canvas02->cd(2);
  109.     //h_biasThreshold->GetXaxis()->SetRange(1,5);
  110.     h_biasThreshold->Project3D("zy");
  111.     h_biasThreshold_zy->DrawCopy("colz");
  112.  
  113.     TCanvas* canvas03 = new TCanvas("canvas03","",1200, 1200);
  114.     canvas03->Divide(4,4);
  115.     int x1=0;
  116.     int x2=3;
  117.     int y1=0;
  118.     int y2=3;
  119.     for(int j=x1; j<=x2; j++){
  120.         for(int k=y1; k<=y2; k++){
  121.                 int channel = map[j][k];
  122.                 int canvasPosition = 4*(4-k-1) + 4 - j;
  123.                 canvas03->cd(canvasPosition);
  124.                 h_biasThreshold->GetXaxis()->SetRange(channel+1,channel+1);
  125.                 char histoName[128];
  126.                 sprintf(histoName, "Ch %d", channel);
  127.                 h_biasThreshold->Project3D("zy");
  128.                 //sprintf(option, "h_biasThresholsd_zy%f", channel);
  129.                 h_biasThreshold_zy->SetTitle(histoName);
  130.                 h_biasThreshold_zy->DrawCopy("colz");
  131.  
  132.         }
  133.     }
  134.     TCanvas* canvas04 = new TCanvas("canvas04","",1200, 1200);
  135.     canvas04->Divide(4,4);
  136.     int x1=0;
  137.         int x2=3;
  138.         int y1=4;
  139.         int y2=7;
  140.         for(int j=x1; j<=x2; j++){
  141.                 for(int k=y1; k<=y2; k++){
  142.                         int channel = map[j][k];
  143.                         int canvasPosition = 4*(8-k-1) + 4 - j;
  144.                         canvas04->cd(canvasPosition);
  145.                         h_biasThreshold->GetXaxis()->SetRange(channel+1,channel+1);
  146.                         char histoName[128];
  147.                         sprintf(histoName, "Ch %d", channel);
  148.                         h_biasThreshold->Project3D("zy");
  149.                         //sprintf(option, "h_biasThresholsd_zy%f", channel);
  150.                         h_biasThreshold_zy->SetTitle(histoName);
  151.                         h_biasThreshold_zy->DrawCopy("colz");
  152.  
  153.                 }
  154.         }
  155.         TCanvas* canvas05 = new TCanvas("canvas05","",1200, 1200);
  156.         canvas05->Divide(4,4);
  157.         int x1=4;
  158.         int x2=7;
  159.         int y1=0;
  160.         int y2=3;
  161.         for(int j=x1; j<=x2; j++){
  162.                 for(int k=y1; k<=y2; k++){
  163.                         int channel = map[j][k];
  164.                         int canvasPosition = 4*(4-k-1) + 8 - j;
  165.                         canvas05->cd(canvasPosition);
  166.                         h_biasThreshold->GetXaxis()->SetRange(channel+1,channel+1);
  167.                         char histoName[128];
  168.                         sprintf(histoName, "Ch %d", channel);
  169.                         h_biasThreshold->Project3D("zy");
  170.                         //sprintf(option, "h_biasThresholsd_zy%f", channel);
  171.                         h_biasThreshold_zy->SetTitle(histoName);
  172.                         h_biasThreshold_zy->DrawCopy("colz");
  173.  
  174.                 }
  175.         }
  176.  
  177.         TCanvas* canvas06 = new TCanvas("canvas06","",1200, 1200);
  178.         canvas06->Divide(4,4);
  179.         int x1=4;
  180.         int x2=7;
  181.         int y1=4;
  182.         int y2=7;
  183.         for(int j=x1; j<=x2; j++){
  184.                 for(int k=y1; k<=y2; k++){
  185.                         int channel = map[j][k];
  186.                         int canvasPosition = 4*(8-k-1) + 8 - j;
  187.                         canvas06->cd(canvasPosition);
  188.                         h_biasThreshold->GetXaxis()->SetRange(channel+1,channel+1);
  189.                         char histoName[128];
  190.                         sprintf(histoName, "Ch %d", channel);
  191.                         h_biasThreshold->Project3D("zy");
  192.                         //sprintf(option, "h_biasThresholsd_zy%f", channel);
  193.                         h_biasThreshold_zy->SetTitle(histoName);
  194.                         h_biasThreshold_zy->DrawCopy("colz");
  195.  
  196.                 }
  197.         }
  198.  
  199.   }
  200.  
  201.   if (strstr(plopt, "th") != NULL) {
  202.    TCanvas* canvas1 = new TCanvas("canvas1","",800,800);
  203.    canvas1->cd();
  204.    //gPad->SetLogz();
  205.    //canvas1->SetLogz();
  206.    TH2F* h_threshold = (TH2F*) rootfile->Get("h_threshold");
  207.    h_threshold->SetTitleOffset(1.5,"y");
  208.    //h_threshold->GetZaxis()->SetRangeUser(0,1000);
  209.    h_threshold->SetContour(20);
  210.    
  211.    h_threshold->Draw("colz");
  212.    
  213.    TCanvas* canvas2 = new TCanvas("canvas2","",1600,800);
  214.    canvas2->Divide(2);
  215.    TH1D* h_projection1 = h_threshold->ProjectionY("Ch 37",38,38);
  216.    canvas2->cd(1);
  217.    //h_projection1->GetYaxis()->SetRangeUser(0,1000);
  218.    //gPad->SetLogy();
  219.    h_projection1->Draw();
  220.    
  221.    TH1D* h_projection2 = h_threshold->ProjectionY("Ch 38",39,39);
  222.    canvas2->cd(2);
  223.    //gPad->SetLogy();
  224.    h_projection2->Draw();
  225.   }
  226.  
  227.   if(strstr(plopt,"16") != NULL)
  228.   {
  229.   TH2F* h_threshold = (TH2F*) rootfile->Get("h_bias");
  230.   TCanvas* canvas = new TCanvas("canvas","",1600,1600);
  231.   TCanvas* canvas11 = new TCanvas("canvas11","",800,800);
  232.   canvas->cd();
  233.   TVirtualPad *main = new TPad("main","main",0,0,1,1,10,1);
  234.   main->Draw();
  235.   main->cd();
  236.   main->Divide(4,4);
  237.   for(int i=chXstart; i<chXend; i++) {
  238.     for(int j=(int)par1; j<(int)par2; j++) {
  239.       int channel = map[i][j];
  240.       TH1D* h_projection = h_threshold->ProjectionY("",channel+1,channel+1);
  241.       int canvasPosition = i-chXend+4*((int)par2-j)+1;
  242.       printf(" %d ", canvasPosition);
  243.       main->cd(canvasPosition);
  244.       gPad->SetMargin(0.08, 0.08, 0.08, 0.08);
  245.       char name[128];
  246.       sprintf(name,"Channel %d",channel);
  247.       h_projection->SetTitle(name);
  248.       h_projection->GetYaxis()->SetRangeUser(0,10000);
  249.       h_projection->DrawCopy("pe1x0");
  250.       canvas11->cd();
  251.       if (canvasPosition == 1) {
  252.         h_projection->SetMarkerStyle(kFullDotMedium);
  253.         h_projection->GetYaxis()->SetRangeUser(0,10000);
  254.         h_projection->DrawCopy("Pl");
  255.         }
  256.       else {
  257.         h_projection->SetMarkerStyle(kFullDotMedium);
  258.         h_projection->SetLineColor(canvasPosition);
  259.         h_projection->SetMarkerColor(canvasPosition);
  260.         h_projection->SetTitle("");
  261.         h_projection->DrawCopy("plsame");
  262.         }
  263.     }
  264.  
  265.   }
  266.   printf("\n");
  267.   }
  268.  
  269.   if(strstr(plopt, "1ch") != NULL)
  270.   {
  271.     TH2F* h_bias = (TH2F*) rootfile->Get("h_bias");
  272.     TCanvas* canvas = new TCanvas("canvas","",800,800);
  273.     canvas->cd();
  274.     int channel = map[chXstart][chXend];
  275.     TH1D* h_projection = h_bias->ProjectionY("",channel+1,channel+1);
  276.     char name[128];
  277.     sprintf(name,"Channel %d",channel);
  278.     h_projection->SetTitle(name);
  279.     h_projection->SetMarkerStyle(kFullDotMedium);
  280.     //h_projection->SetMarkerSize(8);
  281.     gPad->SetMargin(0.1,0.1,0.1,0.1);
  282.    
  283.    
  284.     TF1* f_linear = new TF1("f_linear", "[0] + [1]*x", par1, par2);
  285.     f_linear->SetParameter(0, -1);
  286.     f_linear->SetParameter(1, 0.1);
  287.     f_linear->SetParNames("p0", "p1");
  288.     h_projection->Fit(f_linear,"q");
  289.     h_projection->Fit(f_linear,"r");
  290.     h_projection->Draw("pe1x0");
  291.    
  292.     double p0 = f_linear->GetParameter(0);
  293.     double p1 = f_linear->GetParameter(1);
  294.     printf("p0 %f p1 %f V_b = %f [V]\n", p0, p1, -p0/p1);
  295.     TPaveText *text = new TPaveText(0.15,0.5,0.35,0.56);
  296.     text->SetFillColor(0);
  297.     text->SetBorderSize(0.1);
  298.     text->SetTextSize(0.030);
  299.     char string[128];
  300.     sprintf(string, "V_b = %2.2f", -p0/p1);
  301.     text->AddText(string);
  302.     text->Draw("same");
  303.     text->Paint();
  304.   }
  305.  
  306.   if( strstr(plopt, "all") != NULL ) {
  307.     TCanvas *canvas2 = new TCanvas("canvas2","Hits x;;",2000,2000);
  308.     TCanvas *canvas3 = new TCanvas("canvas3","Hits y;;",2000,2000);
  309.     canvas2->Divide(8,8);
  310.     canvas3->Divide(8,8);
  311.     TH1F* h_hitsx;
  312.     TH1F* h_hitsy;
  313.     for(int i=0; i<c_nChannels; i++) {
  314.       canvas2->cd(i+1);
  315.       char hname[128];
  316.       sprintf(hname, "hnhitsx%d", i);
  317.       h_hitsx = (TH1F*)rootfile->Get(hname);
  318.       h_hitsx->Draw();
  319.       canvas3->cd(i+1);
  320.       sprintf(hname, "hnhitsy%d", i);
  321.       h_hitsy = (TH1F*)rootfile->Get(hname);
  322.       h_hitsy->Draw();  
  323.     }
  324.   }
  325.  
  326.   if( strstr(plopt, "x") != NULL ) {
  327.     TCanvas *canvas10 = new TCanvas("canvas10","Ch x;;",500,500);
  328.     TH1F* h_hitsx;
  329.     canvas10->cd();
  330.     char hname[128];
  331.     sprintf(hname, "hnhitsx%d", chXstart);
  332.     h_hitsx = (TH1F*)rootfile->Get(hname);
  333.     h_hitsx->Draw("colz");
  334.   }
  335.  
  336.   if( strstr(plopt, "y") != NULL ) {
  337.     TCanvas *canvas11 = new TCanvas("canvas11","Ch x;;",500,500);
  338.     TH1F* h_hitsy;
  339.     canvas11->cd();
  340.     char hname[128];
  341.     sprintf(hname, "hnhitsy%d", chXstart);
  342.     h_hitsy = (TH1F*)rootfile->Get(hname);
  343.     h_hitsy->Draw();
  344.   }
  345.  
  346.  
  347.   /** Draws the sum of the channels
  348.     * Each channel is a 2d plot
  349.     * Intended for the study of 1 channel
  350.     */
  351.   if (strstr(plopt, "2d") != NULL) {
  352.    
  353.     int nX = chXend - chXstart + 1;
  354.     int nY = (int)par2 - (int)par1 + 1;
  355.     TCanvas* canvas7 = new TCanvas("canvas7","canvas7", nX*400,nY*400);
  356.     printf("nx %d ny %d\n",nX,nY);
  357.     canvas7->Divide(nX,nY);
  358.     for(int i=(int)par1; i<=(int)par2; i++) {
  359.       for(int j=chXstart; j<=chXend; j++) {
  360.       //int canvasPosition = nX*(i-chYstart)+(j-chXstart)+1;
  361.       int canvasPosition = nX*((int)par2-i)+(j-chXstart)+1;
  362.       if (debug) printf("canvas %d\n",canvasPosition);
  363.         canvas7->cd(canvasPosition);
  364.         char hname[128];
  365.         int chPosition = map[j][i];
  366.         sprintf(hname, "h2d%d", chPosition);
  367.         TH2F* h_2d = (TH2F*)rootfile->Get(hname);
  368.         h_2d->Draw("colz");
  369.       } //x
  370.     }
  371.    
  372.     // Number of photoelectrons - Poissonian correction
  373.     TCanvas* canvas8 = new TCanvas("canvas8","canvas8", 1000,1000);
  374.     canvas8->cd();
  375.     gStyle->SetOptStat(0);
  376.       char hname[128];
  377.       int chPosition = map[1][2];
  378.       sprintf(hname, "h2d%d", chPosition);
  379.       TH2F* h_2d = (TH2F*)rootfile->Get(hname);
  380.  
  381.       Int_t binsX = h_2d->GetXaxis()->GetNbins();
  382.       Int_t minX  = h_2d->GetXaxis()->GetFirst();
  383.       Int_t maxX  = h_2d->GetXaxis()->GetLast()+1;
  384.       Int_t binsY = h_2d->GetYaxis()->GetNbins();
  385.       Int_t minY  = h_2d->GetYaxis()->GetFirst();
  386.       Int_t maxY  = h_2d->GetYaxis()->GetLast()+1;
  387.       Double_t xLowUser  = h_2d->GetXaxis()->GetBinLowEdge(minX);
  388.       Double_t xUpUser   = h_2d->GetXaxis()->GetBinUpEdge(maxX);
  389.       Double_t yLowUser  = h_2d->GetYaxis()->GetBinLowEdge(minY);
  390.       Double_t yUpUser =   h_2d->GetYaxis()->GetBinUpEdge(maxY);
  391.       if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
  392.       TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX, xLowUser, xUpUser, binsY, yLowUser, yUpUser);
  393.      
  394.       double noise = getNoise(h_2d, 1, 89);
  395.       if(debug) printf("Noise = %f\n", noise);
  396.       for(int k=minX; k<=maxX; k++) {
  397.         for(int j=minY; j<=maxY; j++) {
  398.           double signal = h_2d->GetBinContent(k,j); // detected
  399.           //double p = ((signal - noise) > 1) ? (signal-noise) : 1;
  400.           double p = signal - noise;
  401.           p /= 10000.;
  402.           double p0 = 1.0 - p; // events with zero photons
  403.           //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
  404.           double eta = -log(p0); // constant of the poissonian statistics
  405.           if (debug) printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
  406.           double x = k*(xUpUser-xLowUser)/double(binsX);
  407.           double y = j*(yUpUser-yLowUser)/double(binsY);
  408.           h_corrected->Fill(x+3,y+8, eta);
  409.         }
  410.        }
  411.       h_corrected->SetTitle("n_pe = - ln P(0);x[mm];y[mm]");
  412.       h_corrected->GetZaxis()->SetRangeUser(-0.05,0.3);
  413.       h_corrected->Draw("colz");
  414.      
  415.       // collection efficiency
  416.       int nPoints =0;
  417.       double efficiency=0;
  418.       for (int i=18; i<=58; i++) {
  419.         for (int j=19; j<=59; j++) {
  420.           double signal = h_corrected->GetBinContent(i,j);
  421.           if(debug) printf("signal %f\n",signal);
  422.           efficiency += signal;
  423.           nPoints++;
  424.         }
  425.       }  
  426.     printf("Signal sum = %f\n   # of points = %d\n",efficiency,nPoints);
  427.   }
  428.  
  429.   /** Draws the sum of channel signals
  430.     * Each channel is a 2d ('h2d') histogram
  431.     * Suitable for 8x8 chs scan
  432.     */
  433.   if( strstr(plopt, "sum") != NULL ) {
  434.     int nX = 7 - 0 + 1;
  435.     int nY = 7 - 0 + 1;
  436.           TCanvas* canvas12 = new TCanvas("canvas12","c2",8*200, 8*200);
  437.           canvas12->cd();
  438.           gStyle->SetOptStat(0);
  439.  
  440.     // final histogram parameters
  441.     TH2F* h0 = (TH2F*) rootfile->Get("h2d0");
  442.           Int_t binsX = h0->GetXaxis()->GetNbins();
  443.     Int_t minX  = h0->GetXaxis()->GetFirst();
  444.     Int_t maxX  = h0->GetXaxis()->GetLast()+1;
  445.     Int_t binsY = h0->GetYaxis()->GetNbins();
  446.     Int_t minY  = h0->GetYaxis()->GetFirst();
  447.     Int_t maxY  = h0->GetYaxis()->GetLast()+1;
  448.     Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
  449.     Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
  450.     Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
  451.     Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
  452.     if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
  453.     TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX,xLowUser,xUpUser, binsY,yLowUser,yUpUser);
  454.     TH2F* h[9];
  455.    
  456.     // 2d histogram noise subtraction and poisson scaling
  457.     for(int i=0; i<=7; i++) {
  458.       for(int j=chXstart; j<=chXend; j++) {
  459.         int chPosition = map[j][i];
  460.         char hname[128];
  461.               sprintf(hname, "h2d%d", chPosition);  
  462.               int histogram = nX*(i-0)+(j-chXstart);
  463.               h[histogram] = (TH2F *) rootfile->Get(hname);
  464.               int noise = getNoise(h[histogram], 1, 170);
  465.               if (debug) printf("noise: %d\n",noise);
  466.               for(int k=minX; k<=maxX; k++) {
  467.           for(int l=minY; l<=maxY; l++) {
  468.             int signal = h[histogram]->GetBinContent(k,l); // detected
  469.             //double p = ((signal - noise) > 0.1) ? (signal-noise) : 0.1;
  470.             double p = signal - noise;
  471.             p /= 10000.;
  472.             double p0 = 1.0 - p; // events with zero photons
  473.             //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
  474.             double eta = -log(p0);
  475.             //printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
  476.             double x = k*(xUpUser-xLowUser)/double(binsX);
  477.             double y = l*(yUpUser-yLowUser)/double(binsY);
  478.             h_corrected->Fill(x-c_xOffset, y-c_yOffset, signal);
  479.           }
  480.         }    
  481.      
  482.       }
  483.     }
  484.  
  485.     h_corrected->SetTitle("SiPM#2 n_p.e.;x[mm];y[mm]");
  486.     //h_corrected->GetZaxis()->SetRangeUser(-0.05,.30);
  487.     h_corrected->Draw("colz");
  488.    
  489.     TCanvas* canvas13 = new TCanvas("canvas13","canvas13",600,300);
  490.     canvas13->Divide(2);
  491.     canvas13->cd(1);
  492.     //h[16]->Draw("colz");
  493.     canvas13->cd(2);
  494.     //h[8]->Draw("colz");
  495.   }
  496.    
  497.   return(0);
  498. }
  499.  
  500. /** Function calculates the noise from one channel
  501.   * it runs through the bins along x and returns the average value
  502.   */
  503. double getNoise(TH2F* histogram, int yStart, int yEnd)
  504. {
  505.   double noise=0;
  506.   int count=0;
  507.   for(int j=yStart; j<yEnd; j++) {
  508.     double value = histogram->GetBinContent(j,2);
  509.     //if (noise < value) noise = value;
  510.     noise += value;
  511.     count++;
  512.     }
  513.   return (noise/double(count));
  514. }
  515.  
  516.