WebMay 2, 2024 · You should check if your root file contains any TH1 object named Phi_mu. In case you don't know how to check, just open your root file: root -l hist.root then in the interactive mode, type: _file0 -> ls () here _file0 is the TFile object point to your root file. WebHistograms are frequently used in particle physics. In ROOT they play a more central role than even TGraphs. ouY create them with a certain range ... TH1. The active canvas can be saved with ROOT.gPad.SaveAs("foo.pdf") or: #python3 -idemo9_saving.py importROOT infilename="demo_data_file.root"
Histograms in Python — BDSIM 1.6.develop documentation
Web// Each ROOT object derives from a TNamed class, // hence has a , which ROOT uses internally // to keep track of the objects TH1F* h_misura = (TH1F*) sezione_misura_90->Get ("hist"); // now you have a histogram named "hist" in memory; //btw, better to name it something more unique, e.g. hist1, at least TH1F* h_fondo = (TH1F*) … WebThe Histogram stack class. A THStack is a collection of TH1 or TH2 histograms. Using THStack::Draw () the histogram collection is drawn in one go according to the drawing … how did early humans make fire
Histograms - ROOT
WebThis is typically done using histograms, all of which derive from the base class TH1 (T for a ROOT object, H for histogram, and 1 for one-dimensional). There are also two and three dimensional histograms (TH2 and TH3), as well as more specialized histogram types. WebHere we will create a new ROOT file, store a histogram, and read it back. Creating a ROOT file Use the function Open()from TFileto create or open a ROOT file. std::unique_ptrmyFile(TFile::Open("file.root","RECREATE")); myFile=ROOT. TFile. Open("file.root","RECREATE") For the second argument, the following options are available: WebDisabling ROOT’s automatic ownership management for histograms To prevent histograms from being added to the current directory, call the static function TH1::AddDirectory(kFALSE); Now you own all histogram objects and you will need to delete them, for instance through the use of std::unique_ptr. how did early philosophers describe atoms