エラーバー付きのグラフしたい(TGraphErrors
)
1const int npoints = 10;
2double x[npoints] = {1, 2, 4, 8, 16, 3, 9, 18, 5, 25};
3
4TGraphErrors *gre;
5gre = new TGraphErrors(npoints);
6
7for (int i = 0; i < npoints; i++){
8 gre->SetPoint(i, x[i], 3*x[i]-x[i]);
9 gre->SetPointError(i, 0.5, TMath::Sqrt(x[i]));
10}
11
12gre->Draw("ap");