Re: Updating the axis range in a sub pad

Try something like that:

c1->cd(3);
gPad->DrawFrame(0, 500, 0, 500);
hist3->Draw("SAME");

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On Oct 4, 2011, at 4:19 PM, Ida Häggström wrote:



> Hello!

> I have a macro that analyzes a ROOT tree file in which I make a drawing of 6 different histograms in one canvas. I want to manually set the x- and y-axis range of a couple of the pads on the canvas, but I can't get it right it seems! Here's a trimmed code snippet:

> ----------------------------

>    TH2F *hist1= new TH2F("hist1","Transaxial detection position",252,-505.,+505.,252,-505.,+505.);

>    TH1F *hist2= new TH1F("hist2","Axial detection position",100.,-100.,+100.);   

>    TH1F *hist3= new TH1F("hist3","Isotope decay",100,0,500);

>    TH1F *hist4= new TH1F("hist4","Axial sensitivity",100,-100.,+100.);

>    TH1F *hist5= new TH1F("hist5","Axial scatter fraction",100,-100.,+100.);

>    TH1F *hist5a= new TH1F("hist5a","Axial scatters distribution",100,-100.,+100.);

>    TH1F *hist5b = new TH1F("hist5b","",100,-100.,+100.);

>    TH1F *hist6= new TH1F("hist6","Isotope decay 2",100,0,500);

> 

> // New canvas

>    c1 = new TCanvas("c1","TEST",3,28,970,632);

>    Int_t pos=1;

>    c1->Divide(3,2);

>    c1->SetFillColor(0);

>    c1->SetBorderMode(0);

> // First pad

>    c1->cd(pos++);

>    hist1->Draw();

> // Second pad

>    c1->cd(pos++);

>    hist2->Draw();

> // Third pad

>    c1->cd(pos++);

>    hist3->Draw();

>    tex = new TLatex(10.,(int)(hist3->GetMaximum()/2.),"Some text");

>    tex->Draw();

>    tex = new TLatex(10.,(int)(hist3->GetMaximum()/2.*0.8),"Some other text");

>    tex->Draw();

> // Fourth pad

>    c1->cd(pos++);

>    hist4->Draw();

> // Fifth pad

>    c1->cd(pos++);

>    hist5->Divide(hist5a,hist5b,1.,1.,"");  

>    hist5->Draw();

> // Sixth pad

>    c1->cd(pos++);

>    hist6->Draw();

>    tex2 = new TLatex(10.,(int)(hist6->GetMaximum()/2.),"Some text");

>    tex2->Draw();

>    tex2 = new TLatex(10.,(int)(hist6->GetMaximum()/2.*0.8),"Some other text");

>    tex2->Draw();

> 

> // Setting x- and y-axes...  

>    c1->GetPad(3)->GetFrame()->SetY1(0);

>    c1->GetPad(3)->GetFrame()->SetX2(500);

>    c1->GetPad(6)->GetFrame()->SetY1(0);

>    c1->GetPad(6)->GetFrame()->SetX2(500);  

> 

> // Update canvas

>    c1->Update();   

> ----------------------------

> 

> The axis range commands under "// Setting x- and y-axes...  " don't seem to do anything. How can I set these values and properly update the canvas? 

> Any ideas? Thanks! 

> /Ida