#include "TH1.h"
#include "TCanvas.h"
void tut4() {
  Float_t Lower[5];

  Lower[0] = 20;
  Lower[1] = 40;
  Lower[2] = 60;
  Lower[3] = 80;
  Lower[4] = 100;

  TH1F* hist = new TH1F("hist","hist", 4, Lower);

  hist->SetBinContent(1, 1);
  hist->SetBinContent(2, 2);
  hist->SetBinContent(3, 3);
  hist->SetBinContent(4, 4);

  hist->SetMinimum(0);
  hist->Draw();


  Double_t low[6];
  low[0]= hist->GetBinLowEdge(20);
  low[1] = hist->GetBinLowEdge(hist->FindFixBin(40));
  low[2] = hist->GetBinLowEdge(hist->FindFixBin(60));
  low[3] = hist->GetBinLowEdge(hist->FindFixBin(70));
  low[4] = hist->GetBinLowEdge(hist->FindFixBin(80));
  low[5] = hist->GetBinLowEdge(hist->FindFixBin(100));
  TH1F *l = (TH1F*)hist->Rebin((sizeof(low) / sizeof(Double_t) - 1),"hi",low);


  TCanvas *r= new TCanvas();

  l->Draw();



}