Grid Lines in TGraph2D and TH3F

ROOT
1

Dear Rooters:
I am trying to draw a TGraph2D and a TPolyMarker 3D in same canvas:

[code]TCanvas *c1 = new TCanvas(“c1”);
TGraph2D *g = new TGraph2D(“Level0ROOT.dat”,"%lg %lg %lg",",");
TFile *ficheiro= new TFile(“output.root”,“READ”);
TTree data=(TTree)ficheiro->Get(“data”);
data->Draw(“pY:pX:pZ”);

TH3F htemp=(TH3F)gPad->GetPrimitive(“htemp”);
(…)

TAxis *axisZ = htemp->GetZaxis();
htemp->GetZaxis()->SetRangeUser(0.21,0.7);
axisZ->ChangeLabel(1,-1,-1,-1,1,-1,“5.0”);
axisZ->ChangeLabel(2,-1,-1,-1,1,-1,“2.5”);
axisZ->ChangeLabel(3,-1,-1,-1,1,-1,“0.0”);
axisZ-> CenterTitle();
axisZ->SetTitleOffset(1.2);
axisZ-> SetNdivisions(2);
axisZ->SetTitle(“Z (mm)”);

g->Draw(“line SAME”);[/code]

The problem is: I want to draw the grid lines in all the axis. I have already tried with:

c1->SetGrid():

or

gPad->SetGrid();

but not of the methods have success.
What i am doing wrong?

Picture obtained:

Carlos

c1.png698×474 8.87 KB

2

I do not understand your problem because the grid lines are drawn by default on TGraph2D.
See the plots on this page:

root.cern/doc/master/classTGraph2D.html

Can you provide a running example showing your problem ?

3

[quote=“couet”]I do not understand your problem because the grid lines are drawn by default on TGraph2D.
See the plots on this page:

root.cern/doc/master/classTGraph2D.html

Can you provide a running example showing your problem ?[/quote]

Dear Couet:
Thank you for your fast answer. note that, first i draw the TH3F and just on the end i draw the TGraph2d.
Full script and files in attachment.

The code below (that is included in the file) is just a dirty way to get markers with thick lines (as far as i know it is not possible to change line width of markers, right?)

data->Draw("pY:pX:pZ","eventNumber==1 && !(pLevel == 3 || pLevel == 4 || pLevel==0)","SAME"); data->SetMarkerSize(1.1); data->Draw("pY:pX:pZ","eventNumber==1 && !(pLevel == 3 || pLevel == 4 || pLevel==0)","SAME"); data->SetMarkerSize(1.2); data->Draw("pY:pX:pZ","eventNumber==1 && !(pLevel == 3 || pLevel == 4 || pLevel==0)","SAME");

Carlos
output.root (256 KB)
Level0ROOT.dat (53.4 KB)
DrawExcitationsFromFile.C (2.27 KB)

4 
void DrawExcitationsFromFile()
{
   TCanvas *c1 = new TCanvas("c1");

   TGraph2D *g = new TGraph2D("Level0ROOT.dat","%lg %lg %lg",",");

   TFile *ficheiro= new TFile("output.root","READ");
   TTree *data=(TTree*)ficheiro->Get("data");

   data->SetMarkerStyle(4);
   data->SetMarkerColor(kRed);
   Double_t size=data->GetMarkerSize();
   cout<<size<<endl;
   g->Draw("line ");

   data->Draw("pY:pX:pZ","eventNumber==1 && (pLevel == 3 || pLevel == 4)","SAME");
  }
5

Thank you.
It worked, for Z axis.
Is there also a solution for X and Y axis?

Carlos

6

No,… not a simple one …