Hello, I have problems to format axes using SetNdivisions. In the example below the intension is to create a y-axis with 4 primary and 4 secondary divisions. If I use SetNdivisions(404), the program doesn't follow the request but I can at least force it with (-404). This, however, does not work on an axis drawn with TGaxis, e.g. to draw another y-axis on the right of the graph. There I cannot use the minus. Scaling the right axis from 0 to 800, ndiv=404 leads to 1 first and 1 secondary division. By trial and error I fond that ndiv=505 works. However, scaling the same axis from 0 to 1600, neither ndiv 404 nor 505 nor anything else seems to help. Is there some way to generally switch off the optim function for dividing axis? I have the impression that the operation of the command is somehow contradicting to what is written in the manual. Best regards, Steffen { #include <time.h> gROOT->Reset(); gStyle->SetOptTitle(kFALSE); TFile *f = new TFile("time.root","RECREATE"); TCanvas *ct = new TCanvas("ct","example",100,100,500,500); ct->Range(0,0,1,1); Int_t n=2; Float_t x[n] = {600, 3600}; Float_t y[n] = {1000, 6000}; TGraph *gr1 = new TGraph(n,x,y); ct->DrawFrame(0,0,3600,8000); gr1->Draw("L"); gr1->GetXaxis()->SetTimeDisplay(1); gr1->GetXaxis()->SetTimeFormat("%H:%M"); gr1->GetYaxis()->SetNdivisions(-506); gr1->GetYaxis()->SetNdivisions(-404); TGaxis *axisT = new TGaxis(0,8000,3600,8000,0,30,506,"-U"); axisT->Draw(); TGaxis *axisR = new TGaxis(3600,0,3600,8000,0,1600,505,"+"); axisR->Draw(); ct->Modified(); ct->Update(); f->Write(); }
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