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	19662	February 19, 2025
Welcome to the ROOT forum! News	1	8347	February 10, 2017
Question about the scaling factor in ROOT’s weighted Poisson log-likelihood (WLS fit) Roofit and RooStats	0	3	July 22, 2026
Creating own p.d.f. in RooFit Roofit and RooStats python , root	3	21	July 22, 2026
Varying thickness TGeoXtru in ROOT Geometry Geometry root	2	7	July 22, 2026
CERN ROOT on Windows Newbie	10	19	July 22, 2026
Using ROOT with EOS files with macaroons ROOT	6	44	July 22, 2026
Non stability of fitting in roofit Roofit and RooStats	6	61	July 22, 2026
Bug report: TH2::Draw with option "POL" wrongly transforms the coordinate for v6.36 and later ROOT bug	5	14	July 22, 2026
TBufferMerger fails to write histograms to output file for Alma Linux ROOT hist	10	147	July 21, 2026
PyROOT changed handling of multidimensional branches between ROOT 6.32 and 6.34 ROOT	4	78	July 21, 2026
Using numba declare for python MVA node processing ROOT python , rdataframe	8	79	July 21, 2026
Segfault when drawing canvas stored in file ROOT bug	7	47	July 16, 2026
Numerical derivative of an array Newbie	3	371	July 16, 2026
Type name error after RNTuple Merging ROOT root	10	108	July 15, 2026
AvalancheMicroscopic RAM increased usage in newest commits Garfield++	5	67	July 14, 2026
Calculating median with RDataFrame? ROOT	3	51	July 13, 2026
Compiling with ROOT (issue specific to lxplus default root installation) Newbie	2	43	July 13, 2026
PyROOT: differences in object ownership betweeh TH1 and TGraphErrors ROOT	1	34	July 10, 2026
Question about the calculation of chisquare for 2D roofit Roofit and RooStats	1	22	July 9, 2026
Segfault with matplotlib and pyroot ROOT bug	10	64	July 9, 2026
PDG Database and Nuclei ROOT	4	368	July 9, 2026
Problems filtering a vector with a scalar Newbie python , root , rdataframe	3	53	July 8, 2026
Machine Learning on a Large Dataset using PyTorch: RDataFrame vs. uproot? ROOT python , rdataframe	5	608	July 8, 2026
Question about the scaling factor in ROOT's weighted Poisson log-likelihood (WLS fit) Roofit and RooStats root	2	32	July 22, 2026
Language Server for PyROOT ROOT python	4	53	July 21, 2026
Problem with Silvaco TCAD to Garfield++ Garfield++	7	94	July 20, 2026
Share RNTupleReader field addresses across multiple files ROOT io , tree , root	7	66	July 17, 2026
Compilation error while trying to build ROOT via source with GPU enabled ROOT	6	79	July 16, 2026
Possible bug in schema evolution with TClonesArray ROOT bug	7	74	July 14, 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…