// Author: Hari
#include <vector>
#include "TCanvas.h"
#include "TAxis.h"
#include "TH1.h"

void plotter_stack() {
gROOT->Reset();
	
const Int_t ms_n = 3;

TH1 *h1a[ms_n];
TCanvas *c1 = new TCanvas("c1", "", 1000, 700);
THStack *hs = new THStack("hs", "hs"); // 
hs->SetMinimum(0);    //  <<--------------------------   When i setMinumum, I cant setlogy
	
const char* msarray[ms_n] = {"A1", "A2", "A3"};

for(int i=0;i<ms_n;i++) {	

		string msstr = msarray[i];
	
		f = new TFile(("RootFiles/"+msstr+"/hist-data-output.root").c_str());
	
		h1a[i] = 0;
		
		f->GetObject("Leading_ELJ_weta2Hist", h1a[i]);
				
		if(i == (ms_n-1)) {
		h1a[1]->SetFillColor(kGreen-6); 
		h1a[2]->SetFillColor(kBlue-7); 
		h1a[0]->SetFillColor(kRed-6); 
		}
		
		TLegend *l = new TLegend(0.25, 0.75 - 0.0666 *(i + 1), 0.4, 0.75 - 0.0666 * i);
		l->SetBorderSize(0);  // no border
		l->SetFillColor(0);   // Legend background should be white
		l->SetTextSize(0.03); // Increase entry font size! 
		  
		l->AddEntry(h1a[i],( +msstr).c_str(),"f");
		
		hs->Add(h1a[i]);
					
		c1->cd();
		c1->cd()->SetLogy();   //  <<<--------------------- When i set logy, I cant setminium for the THStack
		hs->Draw((i ? "SAME hist" : "hist" ));
		l->Draw((i ? "SAME" : "" )); 
		
	}


}