Dear Root experts, I have a problem on setting the range of a TGraphErrors plot. The comands that I wrote in the macro are the following: g->GetXaxis()->SetTitle("E (MeV)"); g->GetXaxis()->SetRangeUser(1e-9,10.); g->GetYaxis()->SetTitle("Estimated/Ref"); g->GetYaxis()->SetRangeUser(0…

void foxwise() { auto C = new TCanvas(); C->Divide(2,1); // SetRange can define smaller ranges (zoom) C->cd(1); auto gr1 = new TGraph(); gr1->AddPoint(1, 1); gr1->AddPoint(2, 4); gr1->AddPoint(3, 9); gr1->AddPoint(4, 16); gr1->AddPoint(5, 25); gr1->Draw(); gr1->G…

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Problem in setting the range of the plot

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couet May 24, 2022, 9:22am 2

How to set ranges on axis? Howto

The viewing range for a histogram axis can be set from bin ifirst to ilast using the method TAxis::SetRange(ifirst, ilast). Example (hpxpy is a 2D histogram): { TFile f("hsimple.root"); hpxpy->Draw("colz"); hpxpy->GetYaxis()->SetRange(22,23); hpxpy->GetXaxis()->SetRange(18,19); } Sometimes it is more convenient to set this range using “User’s Coordinates” (axis values) rather than bin numbers. To do that one should use TAxis::SetRangeUser(ufirst, ulast). This method computes the cl…

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