in h1.C you should change afzaal to h1 … Well I did it for you in that file h1.C (807 Bytes)
then:
% root h1.C
will work
Your macro is an old version I fixed already. Use:
void h1() {
auto f1 = new TFile("aluminium.root");
TH1D *h_first = (TH1D*)f1->Get("h1");
h_first->SetLineWidth(2);
h_first->SetLineColor(kBlack);
h_first->Draw("hist");
auto f2 = new TFile("glass.root");
TH1D* h_second = (TH1D*)f2->Get("h1");
h_second->SetLineWidth(2);
h_second->SetLineColor(kRed);
h_second->Draw("hist same");
auto f3 = new TFile("bakelite.root");
TH1D* h_third = (TH1D*)f3->Get("h1");
h_third->SetLineWidth(2);
h_third->SetLineColor(kGreen);
h_third->SetMarkerColor(kGreen);
h_third->SetMarkerStyle(2);
h_third->Draw("hist same");
auto legend = new TLegend(0.1,0.7,0.48,0.9);
legend->AddEntry(h_first, "aluminium","L");
legend->AddEntry(h_second, "glass", "L");
legend->AddEntry(h_third, "bakelite");
legend->Draw();
}
The screenshot with errors you attached in today’s post does not match the afzaal.C you attached in the same post: the
TH1* h_first = static_cast<TH1>(f1->Get("h1"));
line is reported to be on line 3 of your file, while in reality it’s on line 23. You probably took an older version of it.
Also, why do you do
root.exe aluminium.root
root [0] .x afzaal.C
?
Why not do
root.exe
root [0] .x afzaal.C
or even much simpler
root.exe afzaal.C
?
Thanks @yus i tried with root.exe afzaal.C but the error is "error: use of undeclared identifier ‘h1’.
Looks like there is a mistake in the latest afzaal.C:
these lines
Double_t scale=1./h1->Integral();
h1->Scale(1/h1->Integral());
h1->Draw("hist same");
should really be
h_first->Scale(1/h_first->Integral());
h_first->Draw("hist same");
Actually, i am talking about its direct opening from root.exe afzaal.C command.