Dear Experts
I want to set titles of graphs which I drawn on the same canvas, here is what I tried, but the title didn’t appear. Can you suggest me which procedure I’m missing?
root -l somefile.root
//in the root UI
Canvas* c = new TCanvas();
c->Divide(4,2);
//code below was in a single line, but for easier reading I put them different lines
for(int i=0; i<8; ++i){
c->cd(i+1); gPad->DrawFrame(0, -0.7, 1000, 0.2);
t->Draw(Form("vol_%d:Iteration$", i+1), "", "LSAME", 1, 0);
auto graph = (TGraph*)gPad->GetPrimitive("Graph");
graph->SetTitle(Form("waveform ch.%d", i));
graph->GetXaxis()->SetTitle("sample");
graph->GetYaxis()->SetTitle("Voltage [V]");
gPad->Modified();
gPad->Update();
}