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The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

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21 Open Issues Need Help Last updated: Feb 2, 2026

Open Issues Need Help

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Typo in RooWorkspace factory documentation 4 days ago

AI Summary: This GitHub issue reports a minor typo in the documentation for the `RooWorkspace::factory` method. An example code snippet demonstrating the creation of a PDF with nested variables contains an extra closing square bracket `]` after the number '3'. The user requests this typo to be corrected in the documentation.

Complexity: 1/5

improvement good first issue in:RooFit/RooStats

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Examples of DefineSlot and RedefineSlot for python 13 days ago

improvement good first issue in:Python Interface in:RDataFrame

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Investigate/Remove potentially unnecessary explicit linking 18 days ago

good first issue in:Build System JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

ROOT package in Debian/Ubuntu 18 days ago

help wanted in:Build System JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

rootcp --replace option ineffective 20 days ago

bug affects:master good first issue in:Other

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

`rootls` improvements 20 days ago

improvement good first issue help wanted in:Other

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[GH] Issue Template Fine-Tuning 21 days ago

improvement good first issue in:CI

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[ROOT-11018] Set 'symmetric' axis 21 days ago

new feature good first issue 1st Hackathon: the Fixhathon in:Hist JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[ntuple] add several useful performance metrics 21 days ago

improvement good first issue in:RNTuple JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

ROOT::Math C++ PRBS generator about 2 months ago

new feature good first issue in:Math Libraries

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[RF] RooHistPdf doesn't cache its integral (was ROOT-10519) 2 months ago

improvement good first issue help wanted in:RooFit/RooStats JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[RF] Add documentation for RooKeysPdf, and to its Mirror option 2 months ago

improvement good first issue in:RooFit/RooStats

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[graph] TScatter and TScatter2D improvements 3 months ago

improvement good first issue in:Graphics

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[RF] RooFit should give an error message when using different variables with same name 4 months ago

improvement good first issue in:RooFit/RooStats JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Add support for THnSparseD histogram in RDataFrame 4 months ago

new feature good first issue in:RDataFrame

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

`TClass::Init()` does two lookups where one is enough 5 months ago

improvement good first issue priority:low in:Cling in:Core Libraries 1st Hackathon: the Fixhathon

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Make TRandom compatible with the std UniformRandomBitGenerator interface 5 months ago

improvement good first issue in:Math Libraries

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[ROOT-5157] Enhance Documentation for I/O customization rules 5 months ago

improvement good first issue in:I/O 1st Hackathon: the Fixhathon JIRA

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Merge reference documentation of MathCore and MathMore 5 months ago

improvement good first issue in:Documentation 1st Hackathon: the Fixhathon

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

[RF] Allow RooUniform to set lower and upper bounds (support) 5 months ago

new feature good first issue in:RooFit/RooStats

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization

Problem to read `TF1`/`TFormula` stored with previous ROOT versions 6 months ago

bug affects:master good first issue in:Math Libraries affects:6.28

root-project/root

3.1K

The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

C++

#c-plus-plus#cling#data-analysis#geometry#graphics#hacktoberfest#interpreter#machine-learning#mathematics#parallel#physics#python#root#root-cern#statistics#visualization