Empty canvas

ROOT
1

I’m having issues getting ROOT to plot a simple histogram for this one piece of code. I can create the histogram, fit functions to it, save it and view it later, but for the life of me i can’t get it to plot when I run it using
root edge.C. It will only pop up an empty canvas.

The code at its most basic looks like:


void edge(){

  gROOT->Reset();

TFile f("spectrums/windows_208Tl_part1__total.root");

TH1F *Compton=new TH1F("Compton","",9000,0,9000);

for(Int_t x=0;x<=9000;x++){

  Compton->SetBinContent(x,NumPE_big->GetBinContent(x));
}

Compton->Draw();

}

I’m running on version 5.24 and this code did seem to be working before. Am I doing anything obviously wrong?

2

Instead of the above code, do

[code]void edge(){

TFile *f = TFile::Open(“spectrums/windows_208Tl_part1__total.root”);

TH1F *Compton=new TH1F(“Compton”,"",9000,0,9000);

for(Int_t x=0;x<=9000;x++){

Compton->SetBinContent(x,NumPE_big->GetBinContent(x));
}

Compton->Draw();

}[/code]

Rene