Problem: Reading a TH1F as TObject

[acgc99]

Hi,
I want to get the GetSumOfWeights of the histograms in: run_01.root (842.2 KB)

I use the following code:

void read_root(TString path, TString keyNominal){
	
	TFile* file = new TFile(path, "READ");
	
	// Keys
	std::vector<TString> keys = {};
	// Cross sections
	std::map<string, Double_t>xs = {};	
	
	// https://gist.github.com/alejolp/c385fde5717120a3ad614ce18c9a2abd
	TIter next(file->GetListOfKeys());
    TKey *key;
    while ((key = (TKey*)next())) {
        cout << key->GetName() << endl;
		
		keys.push_back(key->GetName());
		xs[key->GetName()] = file->Get(key->GetName())->GetSumOfWeights();
    }
	
}

But I get:

/mnt/d/Sync1/Estudios/IFICCSIC/JAEICUIFIC2122/MadGraph/Project2/pp2ttbarllbar_SMEFTsim_analysis/xs_param.c:63:51: error: no member named 'GetSumOfWeights' in 'TObject'
                xs[key->GetName()] = file->Get(key->GetName())->GetSumOfWeights();
                                     ~~~~~~~~~~~~~~~~~~~~~~~~~  ^

But that things are TH1F, not TObject.

---

ROOT Version:ROOT 6.24/06
Platform: Debian, Windows Subsystem for Linux
Compiler: Not Provided

---

[Wile_E_Coyote]

If all your keys are TH1F, you can simply use:
((TH1F*)(file->Get(key->GetName())))->GetSumOfWeights()