Question

我目前有编码从输入的数据集创建CONT图

 const int NbinX = 45; 
 const double binXlow = 0.0; 
 const double binXhigh = 2.0;

 const int NbinY = 45; 
 const double binYlow = 0.0; 
 const double binYhigh = 200.0;


 TH2D* hist3 = new TH2D("hist", "hist", NbinX, binXlow, binXhigh, NbinY, binYlow, binYhigh);

// read in your file     

   ifstream fin("data.dat");

     // while loop to read in file  (checks the input is good )
     // (  x-val    y-val   z-val  )

     double x3 =-999.0;  double y3=-999.0;  double z3 = -999.0;
        while(fin.good()) { 
   fin >> x3 >> y3 >> z3;     
    if( !fin.good()) { break;}  
    // must check if good after reading and before using    
       hist3->Fill( x3 , y3 , z3) ;             
    // Note:  here I just did everything in the while loop 
   }

  TCanvas *c3 = new TCanvas("c3", "c3");

  hist->Draw("CONT4")

然而，与其他颜色图不同，我使用它的颜色比例为z轴的高度。获取CONT图需要做什么？

Answer 1

要获得带线（而不是颜色）的等高线图，您需要

hist->Draw("CONT1");

或

hist->Draw("CONT2");

而不是

hist->Draw("CONT4");

有关等高线图的更多信息，请参阅this。

在ROOT的THistPainter类中使用CONTour选项时，如何添加色标？

1 个答案: