Hello,
I have been having some trouble using RooPlot to plot some data imported from a text file. I am using RooPlot because I need to fit the data. The code is:
[quote]
RooRealVar Signal(“Signal Collection (mV)”, “Signal Collection (mV)”, -160, 40);
// Import .txt file into TTree
TCanvas* c4 = new TCanvas();
TTree *NoiseTree = new TTree("NoiseTree", "NoiseTree");
NoiseTree->ReadFile("<file path>/test33_DryIce.txt", "mV");
RooDataSet dh0("dh0","dh0",RooArgSet(Signal),Import(*NoiseTree));
RooPlot* frame0 = Signal.frame(Title("Signal and Noise"));
dh0->plotOn(frame0);
TH1F* NoiseHist = new TH1F("Signal And Noise", "Signal And Noise", 800, -160, 40);
frame0->Draw();
//NoiseTree->Draw("mV>>NoiseHist");[/quote]
When I use the “NoiseTree->Draw(“mV>>NoiseHist”)” option, I get exactly what the data should look like, as shown in ProperPlot.png; although the range is somewhat off what I would prefer. However, when I use the RooPlot function, “frame0->Draw()”, all the data is at zero except for one point at 20100 (the total number of events in the dataset) – RooPlotIssue.png.
I’ve followed along the tutorials, rf109 and rf401, and built my code based on those. The TTree used here is built from a text file, but it works fine with the “NoiseTree->Draw(“mV>>NoiseHist”)” setting. Unfortunately, since I need to make fits, I can’t use that. Can anyone tell me what I am doing wrong here?
