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	19649	February 19, 2025
Welcome to the ROOT forum! News	1	8343	February 10, 2017
Type name error after RNTuple Merging ROOT root	10	97	July 15, 2026
AvalancheMicroscopic RAM increased usage in newest commits Garfield++	5	57	July 14, 2026
Non stability of fitting in roofit Roofit and RooStats	3	40	July 13, 2026
Calculating median with RDataFrame? ROOT	3	36	July 13, 2026
Compiling with ROOT (issue specific to lxplus default root installation) Newbie	2	25	July 13, 2026
PyROOT: differences in object ownership betweeh TH1 and TGraphErrors ROOT	1	30	July 10, 2026
Question about the calculation of chisquare for 2D roofit Roofit and RooStats	1	16	July 9, 2026
Segfault with matplotlib and pyroot ROOT bug	10	56	July 9, 2026
PDG Database and Nuclei ROOT	4	364	July 9, 2026
Problems filtering a vector with a scalar Newbie python , root , rdataframe	3	50	July 8, 2026
Machine Learning on a Large Dataset using PyTorch: RDataFrame vs. uproot? ROOT python , rdataframe	5	607	July 8, 2026
Question about the scaling factor in ROOT's weighted Poisson log-likelihood (WLS fit) Roofit and RooStats root	1	29	July 8, 2026
Language Server for PyROOT ROOT python	3	48	July 7, 2026
Problem with Silvaco TCAD to Garfield++ Garfield++	6	88	July 6, 2026
Share RNTupleReader field addresses across multiple files ROOT io , tree , root	6	64	July 3, 2026
Compilation error while trying to build ROOT via source with GPU enabled ROOT	5	76	July 2, 2026
Possible bug in schema evolution with TClonesArray ROOT bug	7	67	July 14, 2026
Unexpected behavior of nested for loops when loading a macro with .L Newbie	8	77	June 30, 2026
Could something like TMapFile work with RNTuples? ROOT	3	49	July 13, 2026
Ignore fields when reading an RNTuple ROOT io , tree , root	5	57	July 9, 2026
Using numba declare for python MVA node processing ROOT python , rdataframe	7	69	July 9, 2026
Segfault with pyroot and matplotlib Newbie	2	153	June 24, 2026
Rescaling text with window size ROOT	10	85	July 8, 2026
Building problem with GPU Garfield++	5	82	July 8, 2026
Draw("surf3 same") on top of lego plot Newbie	4	56	June 22, 2026
Location of dropdown menu from TCanvas and context info displaced ROOT root	22	125	July 6, 2026
TChain::Add(TChain*) leaves GetEntries() reporting a wrong, too-small value ROOT tree , root	6	73	July 3, 2026
TTree::GetMinimum/GetMaximum only scan one file of a friend TChain ROOT	4	60	July 2, 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…