//---------------------------------------------------------------------

​

{ // mymacro1.C

  Double_t myFunc(Double_t *x, Double_t *p) {

    return sin(*x)*cos(*x*1.1);

  }

  TF1 *f = new TF1( "myF", myFunc, -20, 20);

  TCanvas *cv = new TCanvas("cname" , "canvas title", 800, 600);

  cv->cd();

  // change directory

  myF->SetNpx(10000);

  myF->SetLineColor(4);

  myF->SetLineWidth(3);

  gPad->SetFillColor(kYellow-10);

  gPad->SetGrid();

  myF->Draw();

  // Θέσε όλους τους τίτλους μεμιάς, παρέχοντας ένα C-string

  myF->SetTitle("plot title;x-axis title;y-axis title");

}

​

//---------------------------------------------------------------------

​

{ // mymacro2.C

  R = new TRandom( time(NULL) );

  // το ROOT προσθέτει αυτομάτως τον τύπο του R

  for ( int i=0; i<15; i++ )

    cout << R->Gaus( 24.5, 2.3 ) << endl;

}

​

//---------------------------------------------------------------------

​

{ // mymacro3.C

  Double_t myFunc(Double_t *x, Double_t *p) {

    return sin(x[0])*cos(x[0]*p[0]);

  }

​

  TCanvas *cv = new TCanvas("cname" , "canvas title", 800, 600);

  cv->cd();   // change directory

​

  R = new TRandom( time(NULL) );   

​

  TF1 *f = new TF1( "myF", myFunc, -20, 20, 1);

  myF->SetTitle("overlapped plots;x-axis title;y-axis title");

  myF->SetNpx(10000);

  myF->SetLineWidth(1);

  myF->SetLineColor(4);

  gPad->SetFillColor(kYellow-10);

  gPad->SetGrid();

​

  string opt="";

  for ( int i=0; i<20; i++ ) {

    myF->SetParameter(0,R->Gaus( 1.0, 0.01 ));

    myF->DrawClone( opt.c_str() );

    opt="same";

  }

}

​

//---------------------------------------------------------------------

​