Not Getting my second points in TGraph


Please read tips for efficient and successful posting and posting code

_ROOT Version:6.18/04
Platform: Linux
Compiler: C++ I think

So I am having issues with making a TGraph from only 2 points. The code used to work but now it is no longer plotting anything but a signal point.

Here is the code.

#include "TString.h"
#include "TF1.h"
#include "TH1F.h"
#include "TMath.h"
#include "TLegend.h"
#include "TFile.h"
#include "TAxis.h"
#include "fstream"
#include "TGraph.h"

void S9_Calib(const int PieTot =16,int Run = 957,TString Type ="S9",TString Serial = "3252-21" ,  TString ListRaw = "Pie", bool SaveIt = false)
{
	for(int Pienum =0;Pienum < PieTot;Pienum++)
	{
		//Load Data file
		TString inname = Form("/data/x1/Detector/SiWinter20/Data/%s/%s/CentroidData/",Type.Data(),Serial.Data());
 		inname += Form("%s-%s_Run%i_%s%02i.txt",Type.Data(),Serial.Data(), Run,ListRaw.Data(),Pienum);
 		ifstream in;
		in.open(inname);
		const int peak = 2;
		double channel[peak];
		double ped = 0;
		double alpha = 5486;
		double energy[peak];
		int NPeak = 0;

		//Setting Varibles to be graphed
  		while (in.good())
		{
			in >>channel[NPeak];
			if (NPeak == 0)
			{	
					
				energy[NPeak] = ped;
			}	
			else 
			{

				energy[NPeak] = alpha;
			}
			
			NPeak++;
		}	
		cout << channel[0]<<endl;
		cout << channel[1]<<endl;
		cout << energy[0]<<endl;
		cout << energy[1]<<endl;
 
//Setting Up Canvas

		TString canname = Form("%s-%s_Run%i_%s%02i_Channel_to_Energy_Fit",Type.Data(),Serial.Data(),Run,ListRaw.Data(),Pienum);
		TCanvas *can = (TCanvas*)gROOT->FindObject(canname);
		if(!can) {can = new TCanvas(canname,canname,605,5,1000,800); can->Divide(1,1,1e-4,1e-4);}
		can->cd();

//Setting labels
		TH1F *hblank = (TH1F*)gROOT->FindObject("hblank_f");
		if(!hblank)
		{
        		TH1F *hblank =new TH1F("hblank_f","",4096,0,4096);
        		hblank->SetTitle("");
		}
		double ylow = -2, yhigh = 10, xlow = -1, xhigh = 4096;

        	hblank->GetXaxis()->SetRangeUser(xlow,xhigh); hblank->GetYaxis()->SetRangeUser(ylow,yhigh);
        	hblank->GetXaxis()->CenterTitle(1); hblank->GetYaxis()->CenterTitle(1);
        	hblank->GetYaxis()->SetTitle("Energy (MeV)");
        	hblank->GetXaxis()->SetTitle("Channel Number");
        	hblank->GetXaxis()->SetTitleSize(0.05); hblank->GetYaxis()->SetTitleSize(0.05);
        	hblank->GetXaxis()->SetTitleOffset(0.7); hblank->GetYaxis()->SetTitleOffset(0.7);
        	hblank->GetXaxis()->SetLabelSize(0.04); hblank->GetYaxis()->SetLabelSize(0.04);
        	hblank->SetTitle(canname);
 		hblank->Draw();
	
		TGraph *myg = new TGraph(peak,channel,energy);
		myg->SetMarkerStyle(20);


		myg->Draw("P");
//Setting Fits
		TF1 *fit_pol = new TF1(Form("Fit_Run%i_%s%02i",Run,ListRaw.Data(),Pienum),"pol1",xlow,xhigh);
		myg->Fit(fit_pol,"0nq");
		fit_pol->Draw("Same");
//Saving if SaveIt is True
		if (SaveIt)
		{
			TString fitnamePath = Form("/data/x1/Detector/SiWinter20/Data/%s/%s/CalibData/",Type.Data(),Serial.Data());
			fitnamePath += Form("Calib_Run%i_%s.root",Run,ListRaw.Data());
			TFile *fit_cal = new TFile(fitnamePath,"update");
			fit_pol->Write("",TObject::kOverwrite);
			fit_cal->Close();

		}

	}
}

For the Pie00 case we have the .txt file reading

104
1022.58

I am unsure why its no longer plotting the points. Please let me know where I went wrong with the code.

The problem has been resolved. Thank you for the tips on posting.