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	19129	February 19, 2025
13th ROOT Users Workshop - Valencia 17-21 November 2025: Abstract Submission Open! News The ROOT core developers would like to invite you to the 13th ROOT Users Workshop taking place in Valencia, at the Politechnical University of Valencia (UPV), from the 17th to the 21st of November 2025. The workshop i…	6	399	February 19, 2025
Welcome to the ROOT forum! News	1	8165	February 10, 2017
Roofit - multiple fit different datasets using different PDFs with some shared parameters Roofit and RooStats python	3	37	October 10, 2025
Multithread RDataFrame.Snapshot with big files and lots of columns ROOT tree , python , root , rdataframe	11	104	October 10, 2025
ROOT 6.32.18 on macOS 26.0.1 from .pkg asking for Rosetta ROOT	0	4	October 10, 2025
Plotting post fit pdf vs data when using variable binning Roofit and RooStats	0	4	October 10, 2025
Reading leaf of fixed-size array from TTree using TTreeReader Newbie tree	0	7	October 9, 2025
Bayesian inference of P(M,A) from measured P(M,X) given non-analytic (numerical) model P(X\|A,M)? Roofit and RooStats	6	43	October 9, 2025
How to show branch/ histogram entries from the command line General Chat tree , root	4	26	October 9, 2025
GetRandom() behavior General Chat	4	14	October 9, 2025
The application is needed to run on visual studio environment? ROOT	4	33	October 9, 2025
Reading data of custom classes Newbie windows	19	130	October 9, 2025
[ROOT::Fitter] how to use Huber loss function for linear fitting ROOT math , root	3	36	October 9, 2025
Valgrind reports memory leak from TObject::Write and TTree::Branch ROOT	4	25	October 8, 2025
ROOT 6.32.18 is out! News	1	30	October 8, 2025
Cannot use Offset() with RooAbsPdf::fitTo() Roofit and RooStats	0	14	October 8, 2025
Gas file for low pressure: PROGRAM STOPPED TOO MANY PRIMARIES Garfield++	3	25	October 7, 2025
What is the best way to fit an unstable function? Roofit and RooStats	3	46	October 7, 2025
Scope issue with Cling? ROOT cling	6	32	October 7, 2025
Negative minNll Roofit and RooStats	4	25	October 7, 2025
Root TCanvas weird behavior in vscode WSL system Newbie installation	4	212	October 7, 2025
Error: reference to ‘Medium’ is ambiguous Garfield++	1	22	October 3, 2025
Warning in <TBufferFile::WriteObjectAny>: An object of type 13TStreamerInfo (from type_info) passed through a TObject pointer was truncated (due a missing dictionary)! Newbie root	4	26	October 2, 2025
ROOT in JupyterLab ROOT	3	28	October 2, 2025
Strange warning from ACLiC (or Cling)? ROOT cling	3	23	October 2, 2025
ROOT creating multiple trees Newbie	5	52	October 1, 2025
Compilation error due to 'font not found in path' ROOT	3	17	October 1, 2025
CMake + Signals/Slots Newbie	4	41	September 30, 2025
Old ROOT open ROOT file created by new version of ROOT ROOT root	4	40	September 30, 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…

4

19129

February 19, 2025

13th ROOT Users Workshop - Valencia 17-21 November 2025: Abstract Submission Open!

News

The ROOT core developers would like to invite you to the 13th ROOT Users Workshop taking place in Valencia, at the Politechnical University of Valencia (UPV), from the 17th to the 21st of November 2025. The workshop i…

6

399

February 19, 2025

Welcome to the ROOT forum!

News