I’ve produced a histogram which I’ve fitted with slightly different functions. Each version has been saved as a separate .root file, that is the canvas was saved via File menu and “Save As”. So each canvas originally had the same name (as it was created with the same macro), and the histogram fitt…

Pepe_Le_Pew March 22, 2016, 10:54pm 2

Execute the following and post the output here: TFile *f = TFile::Open(“first_file.root”); f->ls(); c1->Draw(); c1->GetListOfPrimitives()->Print(); See also, for example:

How to get the content of a TPad/TCanvas ROOT

gROOT->GetListOfCanvases()->ls() gROOT->GetListOfCanvases()->At(0)->ls() ((TCanvas*)(gROOT->GetListOfCanvases()->At(0)))->ls() ((TCanvas*)(gROOT->GetListOfCanvases()->At(0)))->GetListOfPrimitives()->ls() ((TCanvas*)(gROOT->GetListOfCanvases()->At(0)))->GetListOfPrimitives()->At(0)->ls() ((TPad*)(((TCanvas*)(gROOT->GetListOfCanvases()->At(0)))->GetListOfPrimitives()->At(0)))->ls() ((TPad*)(((TCanvas*)(gROOT->GetListOfCanvases()->At(0)))->GetListOfPrimitives()->At(0)))->GetListOfPrimitives()->ls()…

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Combining root canvases