Newbie forum for when you're not sure

If you’re new to ROOT, C++, data analysis etc, and you hesitate to ask your question, then please ask it in the Newbie section, where nice people help and we have special rules to be more welcoming. Don’t hesitate, jus…

0 19703 September 24, 2018 Welcome to the ROOT forum! 0 8364 June 24, 2016 Using RooFit to fit a model with a gaussian, exponential and templatedfunction 0 9 August 21, 2026 Replacing TTree I/O Traversal with Arithmetic: A Coordinate-Indexed Read Path for CMS Open Data 8 50 August 21, 2026 Fill Style issue 2 24 August 19, 2026 Export raytraced geometries in batch mode 4 31 August 18, 2026 Using ROOT with EOS files with macaroons 7 117 August 17, 2026 Rare instance of JSROOT loading a TGraph incorrectly 4 80 August 17, 2026 Question about the scaling factor in ROOT’s weighted Poisson log-likelihood (WLS fit) 5 113 August 15, 2026 RDataFrame with arrays of fixed length arrays? 1 33 August 14, 2026 Sphere: Science Physics High Energy Research Environment 0 38 August 12, 2026 C++20 std::format fails 6 85 August 11, 2026 ROOT 6.40.02 build failure with CMake 4.4.2 2 42 August 7, 2026 GarfieldGPU Elmer 1 49 August 6, 2026 Bug with RooExtendPdf produces inconsistency in rf204b_extendedLikelihood_rangedFit.C between before 6.26 and after 6.28 3 52 August 6, 2026 CERN ROOT on Windows 65 353 August 5, 2026 Issue with new root version on lxplus 2 78 August 3, 2026 TMVA cannot interpret some valid RDataFrame expressions as input variables 1 46 July 31, 2026 Avalanche Microscopic in neBEM is too slow 4 99 July 30, 2026 TBrowser old mode does not open TCanvas in macOS Tahoe 3 43 July 29, 2026 Varying thickness TGeoXtru in ROOT Geometry 5 78 July 28, 2026 Is it time for ROOT to c++ > std20? 3 76 July 28, 2026 Crash in geometry after CheckOverlaps 3 69 July 27, 2026 Bug report: TH2::Draw with option "POL" wrongly transforms the coordinate for v6.36 and later 11 144 July 27, 2026 Segfault when drawing canvas stored in file 8 94 July 24, 2026 Creating own p.d.f. in RooFit 3 71 July 22, 2026 Non stability of fitting in roofit 6 94 July 22, 2026 TBufferMerger fails to write histograms to output file for Alma Linux 9 172 July 21, 2026 PyROOT changed handling of multidimensional branches between ROOT 6.32 and 6.34 3 92 July 21, 2026 Using numba declare for python MVA node processing 7 106 July 21, 2026