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	19143	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	406	February 19, 2025
Welcome to the ROOT forum! News	1	8172	February 10, 2017
Bayesian inference of P(M,A) from measured P(M,X) given non-analytic (numerical) model P(X\|A,M)? Roofit and RooStats	7	49	October 17, 2025
Raw Pointers from TFile Get<TTree> Newbie	1	8	October 17, 2025
Schema Evolution: Renaming a `std::map` Member Variable ROOT io , tree	2	23	October 17, 2025
Strange crash related to TMonitor and GUI (Signals?) ROOT	5	12	October 17, 2025
How i can take two histograms from root-file and make its in one picture? ROOT tree , graphics , hist , root	15	16	October 17, 2025
TTreeReaderArray update not performed with a new TTree? ROOT	1	5	October 17, 2025
Reading data of custom classes Newbie windows	20	142	October 17, 2025
Delphes root files and RDataFrame ROOT tree , hist , python , root , rdataframe	6	9	October 17, 2025
Better official ROOT citations ROOT	2	19	October 17, 2025
Nested RooSimultaneous PDFs - PDF Generation Roofit and RooStats	1	10	October 17, 2025
Reading leaf of fixed-size array from TTree using TTreeReader Newbie tree	2	37	October 16, 2025
"limited" message in RooFit Roofit and RooStats	3	12	October 16, 2025
How to fit to data directly and get parameters to store? ROOT	1	13	October 16, 2025
Infinite error bars on log-Y plot Newbie	2	11	October 16, 2025
ROOT creating multiple trees Newbie	6	60	October 16, 2025
Hadd command segmentation ROOT root	2	11	October 16, 2025
Rounding in TH1F when using weights ROOT	3	15	October 16, 2025
DriftLineRKF looping indefinitely in MPGD implementation Garfield++	3	20	October 16, 2025
The memory leak occured when transporting electrons and ions using AvalancheMC class Garfield++	6	16	October 16, 2025
How to SetBit(TFile::k630forwardCompatibility) Newbie root	3	16	October 15, 2025
Error: reference to ‘Medium’ is ambiguous Garfield++	4	36	October 15, 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	5	35	October 14, 2025
Background normalisation when doing a prefit in a limited range Roofit and RooStats	1	12	October 14, 2025
ROOT 6.32.18 on macOS 26.0.1 from .pkg asking for Rosetta ROOT	9	52	October 13, 2025
ROOT crashing on Mac ROOT installation	4	31	October 13, 2025
Plotting post fit pdf vs data when using variable binning Roofit and RooStats	2	28	October 13, 2025
Issues with displaying TH1s on JSROOT on webpages ROOT jsroot	4	22	October 13, 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

19143

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

406

February 19, 2025

Welcome to the ROOT forum!

News