Multiple root files in same canvas

Newbie
1

I have 4 root files (2 root files are generated from .C macro 1.root & 2.root which have x and y-axis value ) and the other two are histogram root files(geant1.rrot and geant2.root). The second part is causing some problems and without this program is doing very well. How should it be modified

{

TFile *f1 = TFile::Open("1.root");
c1->Draw();
Graph->GetYaxis()->SetRangeUser(1,10000);
Graph->GetXaxis()->SetRangeUser(4,10);
c1->SetLogy();
Graph->SetMarkerStyle(23);


////////////////////////////2nd part/////////////////////////////////

TFile *f5 = TFile::Open("2.root");
TCanvas *c1->Draw();
c1->Draw("same");
Graph->SetMarkerStyle(25);



//////////////////////////////////////////////////////////////////

TFile *f2 = TFile::Open("geant1.root");
TCanvas *c2 = (TCanvas*)f2->Get("h16");
h16->Draw("hist same");
h16->SetName("a");
a->SetLineStyle(7);
a->SetMarkerStyle(26);
a->SetLineColor(12);
a->SetLineWidth(2);

TFile *f3 = TFile::Open("geant2.root");
TCanvas *c3 = (TCanvas*)f3->Get("h16");
h16->Draw("hist same");
h16->SetName("b");
b->SetLineStyle(10);
b->SetMarkerStyle(29);
b->SetLineColor(4);
b->SetLineWidth(2);




leg = new TLegend(0.51,0.69,0.9,0.9);
   leg->SetHeader("result");
   leg->AddEntry(a,"a","l");
   leg->AddEntry(b, "b","l");
   leg->AddEntry(Graph,"ref1","p");
   leg->AddEntry(Graph,"ref2","p");
   leg->SetFillColor(10);
   leg->Draw();

}

_ROOT Version:_6.14
Platform: Ubuntu
Compiler: Not Provided

2

Option “SAME” does not exist for canvases.

c1->Draw("same")

has no meaning

3

Can you provide the data files ?

4

These are the macro files from which first root two files are generated-
1.C (248 Bytes)
2.C (247 Bytes)

Root files created from these two macro files:
1.root (8.1 KB)
2.root (8.1 KB)

Root file from Geant4:
geant1.root (47.3 KB) geant2.root (47.5 KB)

5

Hey @couet,
Did you get/know the answer how to perform ?

6

Olivier will reply next week, he is unavailable yesterday and this weekend.
Axel

7 
void kumar()
{

   TFile *f1 = TFile::Open("1.root");
   TCanvas *c = (TCanvas *)f1->Get("c1");
   TGraphErrors *g1 = (TGraphErrors *)c->GetListOfPrimitives()->FindObject("Graph");
   c->Close();
   g1->GetYaxis()->SetRangeUser(1,10000);
   g1->GetXaxis()->SetRangeUser(4,10);
   g1->SetMarkerStyle(23);
   g1->Draw("AP");
   gPad->SetLogy();

   TFile *f2 = TFile::Open("2.root");
   c = (TCanvas *)f2->Get("c1");
   TGraphErrors *g2 = (TGraphErrors *)c->GetListOfPrimitives()->FindObject("Graph");
   c->Close();
   g2->SetMarkerStyle(23);
   g2->Draw("P");
   g2->SetMarkerStyle(25);

   TFile *f3 = TFile::Open("geant1.root");
   TH1D* h1 = (TH1D*)f3->Get("h16");
   h1->Draw("hist same");
   h1->SetLineStyle(7);
   h1->SetMarkerStyle(26);
   h1->SetLineColor(12);
   h1->SetLineWidth(2);

   TFile *f4 = TFile::Open("geant2.root");
   TH1D* h2 = (TH1D*)f4->Get("h16");
   h2->Draw("hist same");
   h2->SetName("b");
   h2->SetLineStyle(10);
   h2->SetMarkerStyle(29);
   h2->SetLineColor(4);
   h2->SetLineWidth(2);

   auto leg = new TLegend(0.51,0.69,0.9,0.9);
   leg->SetHeader("result");
   leg->AddEntry(h1,"a","l");
   leg->AddEntry(h2, "b","l");
   leg->AddEntry(g1,"ref1","p");
   leg->AddEntry(g2,"ref2","p");
   leg->SetFillColor(10);
   leg->Draw();
}

21
Screenshot 2020-01-13 at 14.23.21.jpg1302×924 90.8 KB

8

Thanks @couet :slight_smile:

9

Hi @couet
I do not want 5.5, 6.5, 7.5 & 8.5 on x-axis (no decimal values). I tried with TGaxis::SetMaxDigits but no change observed.

10 
   g1->GetXaxis()->SetNdivisions(509);