Hello experts! I am having trouble retrieving data inside several ROOT files. I have looked at every Stack Overflow and ROOT forum, but I am still unable to resolve my issue.
I am trying to go through three repositories of structure:
UNIQUEREPO (1 of 3)/same-path-in-each-repo/5_folders/same-next-folder-in-each-repo/unique_name.root
The “5_folders” corresponds to 5 different folders that I need to iterate through in order to get to the final unique_name.root, of which there are 28 in a sea of nearly 100, that I need to pick out. The unique_name.root inherits its name from its “5_folders” parent directory + a binning designator.
In my ROOT TBrowser, if I open one of these unique_name.root files, I see:
TFile** UL_2022/plots/muon/generalTracks/Z/Run2022/NUM_LooseID_DEN_TrackerMuons/efficiency/NUM_LooseID_DEN_TrackerMuons_abseta_1_vs_pt.root TFile* UL_2022/plots/muon/generalTracks/Z/Run2022/NUM_LooseID_DEN_TrackerMuons/efficiency/NUM_LooseID_DEN_TrackerMuons_abseta_1_vs_pt.root KEY: TGraphAsymmErrors g_0_Data;1 Data KEY: TGraphAsymmErrors g_1_Simulation;1 Simulation
My goal is to grab each g_0_Data per repository, for each unique_name.root file. After I have done this, I need to merge all of the g_0_Data data into one canvas and label each contribution via a Legend. Also, I need to grab only 1 g_1_Simulation from each repository, but that should be pretty direct after getting g_0_Data squared away.
I know that keys come into play here and that g_0_Data is the variable, or object name, for the class TGraphAsymmErrors, so I may need to use a way to get the appropriate key designator per unique_name.root per each repository. (grimacing emoji)
My code in attempting to grab the g_0_Data is in this python format below:
inputDir = "UL_2022*/plots/muon/generalTracks/Z/Run2022/" if not os.path.exists('effplots/'): os.makedirs('effplots/') outputDir = "effplots/" c1 = ROOT.TCanvas('c1','c1') for filename in os.listdir(inputDir): inFile = ROOT.TFile.Open(inputDir + filename + "efficiency/" + filename + "_abseta_*.root") hist = inFile.Get("g_0_Data") hist.Draw("SAME") c1.SaveAs(outputDir+"trial.png")
I don’t think that this “inFile” constructor is quite right; I need a better way to iterate through 5 folders and 28 unique_names.root and grab their correct objects to merge together in one canvas. Any help would be greatly appreciated!!
_ROOT Version: 6.20/06