void fit_waveform10(void)
{
//=========Macro generated from canvas: c1/c1
//=========  (Wed Dec 17 14:50:15 2014) by ROOT version5.34/19
   TCanvas *c1 = new TCanvas("c1", "c1",1505,246,779,672);


gROOT->Reset();
//TTree *Bfield = (TTree *) gROOT->FindObject("Bfield");
gStyle->SetPalette(1,0);
gStyle->SetOptStat(kTRUE);
gStyle->SetOptFit(kTRUE);
gStyle->SetOptFit(1111);
gStyle->SetPadRightMargin(0.15);
gStyle->SetPadLeftMargin(0.15);
gStyle->SetPadBottomMargin(0.15);
gStyle->SetFillColor(0);
//

   c1->Range(-21.79487,-16.8,106.4103,95.2);
   c1->SetFillColor(0);
   c1->SetBorderMode(0);
   c1->SetBorderSize(2);
   c1->SetLeftMargin(0.17);
   c1->SetRightMargin(0.05);
   c1->SetBottomMargin(0.15);
   c1->SetFrameBorderMode(0);
   c1->SetFrameBorderMode(0);
   
   TH1F *hist10 = new TH1F("hist10","Ch=40,04,14",100,0,100);
   hist10->SetBinContent(1,2);
   hist10->SetBinContent(3,1);
   hist10->SetBinContent(5,3);
   hist10->SetBinContent(6,3);
   hist10->SetBinContent(7,1);
   hist10->SetBinContent(8,3);
   hist10->SetBinContent(9,2);
   hist10->SetBinContent(10,2);
   hist10->SetBinContent(12,1);
   hist10->SetBinContent(13,2);
   hist10->SetBinContent(14,2);
   hist10->SetBinContent(15,3);
   hist10->SetBinContent(16,3);
   hist10->SetBinContent(17,4);
   hist10->SetBinContent(19,2);
   hist10->SetBinContent(20,2);
   hist10->SetBinContent(21,3);
   hist10->SetBinContent(22,1);
   hist10->SetBinContent(23,3);
   hist10->SetBinContent(25,1);
   hist10->SetBinContent(26,3);
   hist10->SetBinContent(27,2);
   hist10->SetBinContent(28,2);
   hist10->SetBinContent(29,1);
   hist10->SetBinContent(30,3);
   hist10->SetBinContent(31,4);
   hist10->SetBinContent(32,1);
   hist10->SetBinContent(33,2);
   hist10->SetBinContent(34,1);
   hist10->SetBinContent(35,2);
   hist10->SetBinContent(36,18);
   hist10->SetBinContent(37,50);
   hist10->SetBinContent(38,71);
   hist10->SetBinContent(39,74);
   hist10->SetBinContent(40,72);
   hist10->SetBinContent(41,66);
   hist10->SetBinContent(42,61);
   hist10->SetBinContent(43,55);
   hist10->SetBinContent(44,49);
   hist10->SetBinContent(45,44);
   hist10->SetBinContent(46,43);
   hist10->SetBinContent(47,39);
   hist10->SetBinContent(48,36);
   hist10->SetBinContent(49,33);
   hist10->SetBinContent(50,31);
   hist10->SetBinContent(51,29);
   hist10->SetBinContent(52,26);
   hist10->SetBinContent(53,23);
   hist10->SetBinContent(54,24);
   hist10->SetBinContent(55,22);
   hist10->SetBinContent(56,19);
   hist10->SetBinContent(57,18);
   hist10->SetBinContent(58,15);
   hist10->SetBinContent(59,18);
   hist10->SetBinContent(60,16);
   hist10->SetBinContent(61,15);
   hist10->SetBinContent(62,15);
   hist10->SetBinContent(63,16);
   hist10->SetBinContent(64,14);
   hist10->SetBinContent(65,14);
   hist10->SetBinContent(66,12);
   hist10->SetBinContent(67,12);
   hist10->SetBinContent(68,13);
   hist10->SetBinContent(69,12);
   hist10->SetBinContent(70,10);
   hist10->SetBinContent(71,8);
   hist10->SetBinContent(72,9);
   hist10->SetBinContent(73,9);
   hist10->SetBinContent(74,8);
   hist10->SetBinContent(75,7);
   hist10->SetBinContent(76,8);
   hist10->SetBinContent(77,6);
   hist10->SetBinContent(78,4);
   hist10->SetBinContent(79,5);
   hist10->SetBinContent(80,3);
   hist10->SetBinContent(81,5);
   hist10->SetBinContent(82,5);
   hist10->SetBinContent(83,3);
   hist10->SetBinContent(84,4);
   hist10->SetBinContent(85,4);
   hist10->SetBinContent(86,4);
   hist10->SetBinContent(87,4);
   hist10->SetBinContent(88,5);
   hist10->SetBinContent(89,4);
   hist10->SetBinContent(90,5);
   hist10->SetBinContent(91,7);
   hist10->SetBinContent(92,4);
   hist10->SetBinContent(93,3);
   hist10->SetBinContent(94,7);
   hist10->SetBinContent(95,6);
   hist10->SetBinContent(96,6);
   hist10->SetBinContent(97,4);
   hist10->SetBinContent(98,4);
   hist10->SetBinContent(99,5);
   hist10->SetBinContent(100,3);
   hist10->SetMaximum(84);
   hist10->SetEntries(1100);
   // hist10->SetStats(0);
   hist10->SetLineColor(2);
   hist10->GetXaxis()->SetTitle("sample   (4 ns)");
   hist10->GetXaxis()->SetNdivisions(505);
   hist10->GetXaxis()->SetLabelFont(42);
   hist10->GetXaxis()->SetLabelSize(0.07);
   hist10->GetXaxis()->SetTitleSize(0.07);
   hist10->GetXaxis()->SetTitleFont(42);
   hist10->GetYaxis()->SetTitle("ADC value");
   hist10->GetYaxis()->SetNdivisions(505);
   hist10->GetYaxis()->SetLabelFont(42);
   hist10->GetYaxis()->SetLabelSize(0.07);
   hist10->GetYaxis()->SetTitleSize(0.07);
   hist10->GetYaxis()->SetTitleOffset(1.2);
   hist10->GetYaxis()->SetTitleFont(42);
   hist10->GetZaxis()->SetLabelFont(42);
   hist10->GetZaxis()->SetLabelSize(0.07);
   hist10->GetZaxis()->SetTitleSize(0.07);
   hist10->GetZaxis()->SetTitleFont(42);
   hist10->Draw("");
   
   TPaveText *pt = new TPaveText(0,0.9018323,0.416129,0.995,"blNDC");
   pt->SetName("title");
   pt->SetBorderSize(0);
   pt->SetFillColor(0);
   pt->SetFillStyle(0);
   pt->SetTextFont(42);
   TText *text = pt->AddText("Ch=40,04,14");
   pt->Draw();
   c1->Modified();
   c1->cd();
   c1->SetSelected(c1);


   // define pulse function

   Double_t xmin=0;
   Double_t xmax=100;

   TF1 *pulse = new TF1("pulse_func",pulse_func,xmin,xmax,5);
   Double_t mu=1/8.;    // unis of 1/x
   Double_t sigma=5;     // units of x 
   Double_t gain=500;   
   Double_t t0=40;
   Double_t pedestal=2;
   pulse->SetParameters(mu,sigma,gain,t0,pedestal);
   pulse->SetParNames("mu","sigma","gain","t0","pedestal");
  
   hist10->Fit(pulse);
   c1->SaveAs("fit_waveform10.pdf");

}
Double_t pulse_func (Double_t *x, Double_t *par) {

   Double_t mu=par[0];
   Double_t sigma=par[1];
   Double_t gain=par[2];
   Double_t t0=par[3];
   Double_t pedestal=par[4];
   Double_t x1=x[0]-t0;

   char string[256];

   Double_t func;
   Double_t amplitude;

   if (x1 < -20) {
           func = pedestal;
           }
   else if {

         Double_t arg = (mu*sigma*sigma-x1)/(sqrt(2)*sigma);
         Double_t arg2 = -mu*x1 +(mu*sigma)*(mu*sigma)/2;
         amplitude = (mu/2)* exp(arg2) *  TMath::Erfc(arg);
          func = gain * amplitude + pedestal;
  }
   
   /*sprintf (string,"x1=%f amplitude=%f mu=%f sigma=%f t0=%f pedestal=%f, func=%f\n",x1,amplitude,mu,sigma,pedestal,func);
   printf ("string=%s",string);*/

   return func;
}