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…	0	19771	September 24, 2018
Welcome to the ROOT forum! News	0	8406	June 24, 2016
TArrayI::GetAt() returns Double_t? ROOT	1	33	October 11, 2026
Possible bug in 2D multi-range extended fit with EvalBackend("cpu") Roofit and RooStats	2	59	October 8, 2026
TProfile::Chi2Test is scale invariant ROOT	6	116	October 8, 2026
Transverse mass calculaton with TLorentzVector gives wrong results Newbie root	14	579	October 8, 2026
Segmentation violation using h2root with 6.40.04 ROOT	3	78	October 6, 2026
Question(s) about the migration to cppjit ROOT python	4	39	October 6, 2026
Avalanche photons in Garfield++ Garfield++ garfield	3	63	October 5, 2026
Asimage, libAfterImage, X11 implicit function declaration and conversion errors in compiling from source Newbie build , root	9	68	October 2, 2026
Right Arrow alignment in text ROOT graphics	5	43	September 30, 2026
Embedded Cling partially working Newbie cling	1	40	September 28, 2026
Broken cfortran.h in ROOT ROOT build	2	42	September 25, 2026
Reading object from file currently processed in RDataFrame ROOT rdataframe	3	101	September 17, 2026
Current root file in RDataframe ROOT rdataframe	2	51	September 17, 2026
Rootssh and tcsh Newbie	6	55	September 16, 2026
Question about the scaling factor in ROOT’s weighted Poisson log-likelihood (WLS fit) Roofit and RooStats	11	252	September 15, 2026
Custom RDataSource without (or with limited) multithreading ROOT	3	62	September 11, 2026
Plotting LEGO with SURF Newbie	1	57	September 8, 2026
Sphere: Science Physics High Energy Research Environment Evolution Proposals, Apps & Ideas	1	128	September 6, 2026
Pointers displayed during usage of TBrowser Newbie	1	55	September 4, 2026
CMake Configure Error on Windows ROOT cmake	1	61	September 2, 2026
TF1 drawing issue in ROOT versions > 6.28.10 ROOT	4	76	August 29, 2026
Unexpected behavior of nested for loops when loading a macro with .L Newbie	13	172	August 28, 2026
ROOT 6.40.04 is out! News	0	65	August 28, 2026
RNTuple: MakeField causes termination of program ROOT rdataframe	7	83	August 27, 2026
Using RooFit to fit a model with a gaussian, exponential and templatedfunction Roofit and RooStats roofit	1	74	August 24, 2026
Replacing TTree I/O Traversal with Arithmetic: A Coordinate-Indexed Read Path for CMS Open Data ROOT tree , root	8	134	August 21, 2026
Fill Style issue ROOT bug	2	74	August 19, 2026
Export raytraced geometries in batch mode Geometry	4	88	August 18, 2026

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…