Hello, Would anybody mind having a quick look at this code and advising me of how to: a) Plot another y axis on the right hand side with a different scale on it b) Label the x and y axes c) label the lines on the graph. I have been trying commands such as inputspec->GetAxis()->SetTitle() axis1->SetName etc Many thanks in advance. Here is the code: { gROOT->Reset(); // reset global variables gStyle->SetCanvasColor(10); gStyle->SetTitleColor(10); gStyle->SetFrameFillColor(10); gStyle->SetOptStat(0); ifstream data; // declare a file to input from data.open("led1.data"); // open file containing values const Int_t n = 100; // number of points to be plotted Int_t in = 0; Float_t x[n], y1[n], y2[n]; Float_t x1; char line[1024]; while (data >> x1) { x[in] = x1; data >> y1[in]; data >> y2[in]; in++; } for (Int_t i=0; i<in; i++) { cout << x[i] << " " << y1[i] << " " << y2[i] << endl; } TGraph *inputSpec = new TGraph(in, x, y1); TGraph *inputSpec2 = new TGraph(in, x, y2); inputSpec->SetTitle("Intensity of LED 1"); TCanvas *c1 = new TCanvas("c1", "Intensity of LED 1",0, 0, 800, 600); c1->SetLogy(); inputSpec->Draw("AC"); inputSpec2->Draw("CP"); } -- -------------------------------------------------------------------- | Miss Marieke Navin wk:+1142223553 | | Particle Physics and Particle Astrophysics fx:+1142728079 | | Department of Physics and Astronomy mb:07919687122 | | University of Sheffield | | Hicks Building, Hounsfield Road | | M.Navin@sheffield.ac.uk | | Sheffield, | | S3 7RH, United Kingdom | --------------------------------------------------------------------
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