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	19127	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	398	February 19, 2025
Welcome to the ROOT forum! News	1	8163	February 10, 2017
Valgrind reports memory leak from TObject::Write and TTree::Branch ROOT	0	2	October 7, 2025
What is the best way to fit an unstable function? Roofit and RooStats	3	37	October 7, 2025
Multithread RDataFrame.Snapshot with big files and lots of columns ROOT tree , python , root , rdataframe	10	94	October 7, 2025
Scope issue with Cling? ROOT cling	6	28	October 7, 2025
Negative minNll Roofit and RooStats	4	21	October 7, 2025
Root TCanvas weird behavior in vscode WSL system Newbie installation	4	208	October 7, 2025
Bayesian inference of P(M,A) from measured P(M,X) given non-analytic (numerical) model P(X\|A,M)? Roofit and RooStats	3	31	October 3, 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	26	October 2, 2025
Strange warning from ACLiC (or Cling)? ROOT cling	3	20	October 2, 2025
[ROOT::Fitter] how to use Huber loss function for linear fitting ROOT math , root	1	27	October 2, 2025
ROOT creating multiple trees Newbie	5	51	October 1, 2025
Compilation error due to 'font not found in path' ROOT	3	15	October 1, 2025
Gas file for low pressure: PROGRAM STOPPED TOO MANY PRIMARIES Garfield++	2	17	October 1, 2025
CMake + Signals/Slots Newbie	4	40	September 30, 2025
Old ROOT open ROOT file created by new version of ROOT ROOT root	4	39	September 30, 2025
Roofit - multiple fit different datasets using different PDFs with some shared parameters Roofit and RooStats python	2	33	September 30, 2025
createNLL failure in ROOT 6.34 ROOT	4	31	September 29, 2025
Root Manual Website, example for creating variable bins histogram Site Feedback	2	18	September 29, 2025
Scan TTree to file General Chat	6	37	September 29, 2025
Training completed, but code exited before evaluating (test from weights?) TMVA	1	16	September 29, 2025
Compiler information for Intel LLVM not shown in banner ROOT root	4	28	September 29, 2025
How to correctly display TCanvas in Jupyter notebook ROOT python , root	23	87	September 26, 2025
Zooming out on canvas Newbie	1	18	September 26, 2025
Vector branch and TTreeFormula ROOT	3	20	September 25, 2025
No auxcflags set in root-config when building for riscv64 (6.36.02) ROOT root	6	39	September 25, 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

19127

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

398

February 19, 2025

Welcome to the ROOT forum!

News