Access TFile elements when cycle maxes out

[Wile_E_Coyote]

Retrieving an unnamed TGraph

{ // https://root.cern.ch/root/html534/TFile.html TFile *f = TFile::Open("MyFile.root"); // https://root.cern.ch/root/html534/TDirectoryFile.html gDirectory->ls(); // https://root.cern.ch/root/html534/TList.html TList *l = gDirectory->GetListOfKeys(); for (Int_t i = 0; i < l->GetSize(); i++) ((TKey *)(l->At(i)))->ls(); TGraph *g = 0; for (Int_t i = 0; i < l->GetSize(); i++) { // https://root.cern.ch/root/html534/TKey.html TKey *k = ((TKey *)(l->At(i))); if (TString(…

On using a TList to store TH1 / TGraph objects?

Okay, got it. I didn’t realize the TGraphs are never attached to the file. I post my code in case someone has a similar question in the future. TList *GetObjects(char *filename) { TH1 *histo; TGraph *graph; TList *myObjects = new TList(); myObjects->SetName("myObjects"); TFile *f = new TFile(filename); TIter next(f->GetListOfKeys()); TKey *key; while (key = (TKey*)next()) { TClass *cl = gROOT->GetClass(key->GetClassName()); if (cl->InheritsFrom("TH1")) { histo = …