Additional histograms in cont4-plots

ROOT
1

Hello out there,

I’d like to use a contour plot with “cont4” option instead of “colz” because it looks much nicer. With “colz” I use an additional “cont3” plot to improve the visibility of the contour levels. As I have read and have experienced myself, this is not possible with “cont4” plots, the “cont3” plot is just never visible. Is there a different way to draw those lines or a solution how to draw the “cont3” plot?

thanks
Nico

2

Use cont0 instead of cont4

Rene

3

Maybe I’m doing it in totally the wrong way but cont0 looks quite strange (see attachment).

cont4.jpg696×472 14.8 KB


cont0.jpg696×472 16.3 KB

4

Use a transparent pad like in the following example:

{

   TCanvas *c  = new TCanvas("c","Contour",0,0,800,700);

   TF2 *f2 = new TF2("f2","0.1+1000*((1-(x-2)*(x-2))*(1-(y-2)*(y-2)))",1,3,1,3);
   f2->SetFillStyle(1000);
   f2->SetLineWidth(1);

   double contours[3];
   contours[0] = 500;
   contours[1] = 700;
   contours[2] = 900;
   f2->SetContour(3,contours);

   Int_t colors[3] = {kRed, kYellow, kGreen};
   gStyle->SetPalette(3,colors);

   f2->Draw("cont4 z");

   TPad *pad1 = new TPad("pad1","",0,0,1,1);
   pad1->SetFillStyle(0);
   pad1->SetFrameFillStyle(0);
   pad1->Draw();
   pad1->cd();
   f2->Draw("cont3");
}

the cont4 option uses a nomalized corrdinates system. That’s why the option SAME doesn’t work directly on it.

5

Wow, that really works fine!

Thanks a lot!