feat: Add getters to Histo

[bastienvoirin]

Context:

madanalysis5/tools/SampleAnalyzer/Process/Plot/Histo.cpp

Lines 129 to 161 in d08d384

	void Histo::Write_RootFormat(std::pair<TH1F*,TH1F*>& histo)
	{
	// Creating ROOT histograms
	histo.first -> SetBins(nbins_,xmin_,xmax_);
	histo.second -> SetBins(nbins_,xmin_,xmax_);
	// Filling histos
	for (unsigned int i=0;i<histo_.size();i++)
	{
	histo.first -> SetBinContent(i+1,histo_[i].first);
	histo.second -> SetBinContent(i+1,histo_[i].second);
	}
	histo.first -> SetBinContent(0,underflow_.first);
	histo.second -> SetBinContent(0,underflow_.second);
	histo.first -> SetBinContent(histo_.size()+1,overflow_.first);
	histo.second -> SetBinContent(histo_.size()+1,overflow_.second);
	// Filling statistics for histo with positive weight
	histo.first -> SetEntries(nentries_.first);
	Double_t stats[4];
	stats[0]=sum_w_.first;
	stats[1]=sum_ww_.first;
	stats[2]=sum_xw_.first;
	stats[3]=sum_xxw_.first;
	histo.first -> PutStats(stats);
	histo.second -> SetEntries(nentries_.second);
	stats[0]=sum_w_.second;
	stats[1]=sum_ww_.second;
	stats[2]=sum_xw_.second;
	stats[3]=sum_xxw_.second;
	histo.second -> PutStats(stats);
	}

was removed by 7db20d3 (v1.4?), so no way to manipulate and save the histograms other than using their SAF representation is provided AFAIK.

Description of the Change:

Make protected members of Histo readable through getters.

Benefits:

This change allows to manipulate and save histograms in a user-defined way.

Possible Drawbacks:

Related GitHub Issues: