doc/v628/hksimple_8C.html

void canvasRefresh(TCanvas *c1)

{

   for (Int_t j = 0; j < 3; j++)

      c1->GetPad(j+1)->Modified();


   c1->Modified();

   c1->Update();


   gSystem->ProcessEvents();

}


void hksimple()

{

// Create a new canvas.

   TCanvas* c1 = new TCanvas("c1","Dynamic Filling Example",200,10,600,900);


// Create a normal histogram and two TH1K histograms

   TH1 *hpx[3];

   hpx[0]    = new TH1F("hp0","Normal histogram",1000,-4,4);

   hpx[1]    = new TH1K("hk1","Nearest Neighbour of order 3",1000,-4,4);

   hpx[2]    = new TH1K("hk2","Nearest Neighbour of order 16",1000,-4,4,16);

   c1->Divide(1,3);

   for (Int_t j = 0; j < 3; j++) {

      c1->cd(j + 1);

      hpx[j]->SetFillColor(48);

      hpx[j]->Draw();

   }


// Fill histograms randomly

   gRandom->SetSeed(12345);

   Float_t px, py, pz;

   const Int_t kUPDATE = 10;

   for (Int_t i = 0; i <= 300; i++) {

      gRandom->Rannor(px,py);

      for (Int_t j = 0; j < 3; j++)

         hpx[j]->Fill(px);

      if (i && (i % kUPDATE) == 0)

         canvasRefresh(c1);

   }


   for (Int_t j = 0; j < 3; j++)

      hpx[j]->Fit("gaus");


   canvasRefresh(c1);

}

Int_t
int Int_t
Definition RtypesCore.h:45

Float_t
float Float_t
Definition RtypesCore.h:57

kUPDATE
@ kUPDATE
Definition TFitParametersDialog.cxx:46

gRandom
R__EXTERN TRandom * gRandom
Definition TRandom.h:62

gSystem
R__EXTERN TSystem * gSystem
Definition TSystem.h:560

TAttFill::SetFillColor
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition TAttFill.h:37

TCanvas
The Canvas class.
Definition TCanvas.h:23

TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition TH1.h:577

TH1K
TH1K class supports the nearest K Neighbours method, widely used in cluster analysis.
Definition TH1K.h:26

TH1
TH1 is the base class of all histogram classes in ROOT.
Definition TH1.h:58

TH1::Draw
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3060

TRandom::SetSeed
virtual void SetSeed(ULong_t seed=0)
Set the random generator seed.
Definition TRandom.cxx:608

TRandom::Rannor
virtual void Rannor(Float_t &a, Float_t &b)
Return 2 numbers distributed following a gaussian with mean=0 and sigma=1.
Definition TRandom.cxx:500

TSystem::ProcessEvents
virtual Bool_t ProcessEvents()
Process pending events (GUI, timers, sockets).
Definition TSystem.cxx:419

c1
return c1
Definition legend1.C:41

HFit::Fit
TFitResultPtr Fit(FitObject *h1, TF1 *f1, Foption_t &option, const ROOT::Math::MinimizerOptions &moption, const char *goption, ROOT::Fit::DataRange &range)
Definition HFitImpl.cxx:133