ROOT Forum

Topic	Replies	Views	Activity
Newbie forum for when you're not sure News 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…	4	19320	February 19, 2025
Welcome to the ROOT forum! News	1	8212	February 10, 2017
Issues Processing TTrees in Parallel Using TTreeProcessorMT ROOT	2	5	January 15, 2026
Pdf projection difference between root 6.36.06 and root 6.38.00 Roofit and RooStats	2	8	January 15, 2026
Problems Loading Root to MacBook ROOT	7	59	January 15, 2026
Random number generation with RDataFrame ROOT	7	48	January 14, 2026
Announcement of a school dedicated to the simulation of Gaseous Detectors Garfield++	0	23	January 12, 2026
Charge Sharing Phenomenon between Collector and Guard Ring in GARFIELD Ionization Chamber Simulation Garfield++	3	33	January 12, 2026
Problems in PyROOT and calling in ROOT functions ROOT tree , python , root	1	16	January 12, 2026
Comparison of binned data to results of unbinned fit Roofit and RooStats	2	31	January 9, 2026
Reading data of custom classes Newbie windows	23	213	January 9, 2026
Intro and queries regarding GSoc 26' Newbie	2	33	January 8, 2026
Unexpected result with RooFFTConvPDF after ROOT 6.32 Roofit and RooStats root	3	30	January 8, 2026
Catching forgetting to bind the variable to the TTree early on ROOT tree	4	20	January 7, 2026
Nesting Numba functions ROOT python	1	24	January 7, 2026
Setting old GUI as default ROOT	2	13	January 7, 2026
Roofit: PDFs with different domain in the same model (e.g. gauss + lognormal) Roofit and RooStats	6	65	January 4, 2026
Shadow warnings on MacOS (CLang) were never fixed? ROOT	4	29	January 2, 2026
Are there any plans to backport the CMake 4.0.0 fixes (especially for subpackages) to earlier releases ROOT cmake	1	22	January 2, 2026
RDF Display width ROOT	2	20	January 15, 2026
Problems with buttons for advance, stop, and event selection in Event Display view in standalone code ROOT root	5	25	January 14, 2026
Silent crash when adding key to nlohmann::json object with semicolon omitted ROOT bug , cling	2	26	January 8, 2026
Value_counts in RDataFrame Newbie python , rdataframe	2	24	December 25, 2025
Plus minus sign in a latex or a text Newbie	6	3261	December 24, 2025
Unexpected diffusion with AvalancheMC at high pressure (10 atm) for negative ions Garfield++	2	26	January 5, 2026
Multithreading in ROOT::Fit::Fitter::FitFCN? ROOT	3	29	January 2, 2026
Do I need to update ClassDef if I change the name of a variable Newbie	2	26	December 19, 2025
ODBC and MySQL connectivity with Root 6.36 (and beyond) ROOT	7	161	December 18, 2025
TGraph.Fit() usage with EnableImplicitMT(). Is TGraph.Fit() thread-safe? ROOT bug , rdataframe	2	31	December 31, 2025
How to can I use TMVA to draw the ROC curve and compute its AUC of a discriminative variable? TMVA	1	16	December 17, 2025

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…