Drawing multiple TGraph2D's

ROOT
1

Hello,

I’m trying to draw a second TGraph2D after drawing a first without changing the range of the axes. I feel like this should be relatively simple but I haven’t been able to find anything searching the forum. I did find this http://root.cern.ch/root/roottalk/roottalk01/3382.html which says that for TGraph “same” isn’t supported although the “a” option is different between TGraph2D and TGraph. In one of the examples on the TGraph2D class reference page an option of “same p0” is used. When I try this the first one is erased and the second is drawn.

Thanks!

2

Example:

void graph2dsame2()
{
   gStyle->SetOptStat(0);
   gStyle->SetOptFit(1111);

   TCanvas *c = new TCanvas("c","Graph2D example",0,0,800,800);

   TH2F *h1 = new TH2F("h1","h1",10,0,10,10,0,10);
   h1->SetDirectory(0);
   h1->SetMinimum(0);
   h1->SetMaximum(10);

   Double_t x1[4] = {1,1,2,2};
   Double_t y1[4] = {1,2,1,2};
   Double_t z1[4] = {1,2,3,4};

   TGraph2D *g2d1 = new TGraph2D(4,x1,y1,z1);
   g2d1->SetHistogram(h1);
   g2d1->Draw("P0 TRI1");

   TH2F *h2 = new TH2F("h2","h2",10,0,10,10,0,10);
   h2->SetDirectory(0);
   h2->SetMinimum(0);
   h2->SetMaximum(10);

   Double_t x2[4] = {5,5,6,6};
   Double_t y2[4] = {5,6,5,6};
   Double_t z2[4] = {5,6,7,8};

   TGraph2D *g2d2 = new TGraph2D(4,x2,y2,z2);
   g2d2->SetHistogram(h2);
   g2d2->Draw("P0 TRI1 SAME");
}
1 Like