JuliaAI/MLJBase.jl

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Core functionality for the MLJ machine learning framework

Stars: 163
Forks: 46
Open beginner issues: 0
Indexed issues: 41
Avg merge: 1d 18h
Merged PRs (30d): 5

Dominant language: Julia
License: MIT
Last GitHub push: Sep 7, 2026
Latest indexed: Sep 18, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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41 open issues indexed

Have `unpack` support `String` names for the columns Open

JuliaAI/MLJBase.jl#1043 · 3 comments · 1 assignee · Opened Jan 11, 2026
Stop exporting `classes` Open

next breaking release

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaAI/MLJBase.jl#1021 · Opened Sep 26, 2025
Weights in pipelines Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

JuliaAI/MLJBase.jl#1005 · 2 comments · Opened Jul 31, 2025
`MLJBase.scitype` conflict with `ScientificTypes.scitype` Open

next breaking release

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#1002 · Opened Jul 2, 2025
Where to implement spatial resampling methods Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#989 · 2 comments · Opened Sep 28, 2024
Make use of ArguMend.jl to improve error messaging around keyword arguments Open

easy good first issue

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#978 · 1 comment · Opened May 6, 2024
Add `TestOnly` resampling strategy? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

JuliaAI/MLJBase.jl#976 · Opened Apr 24, 2024
Redundant stacktraces Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#947 · 2 comments · Opened Oct 19, 2023
Add facility to specify a default logger different from `nothing` Open

JuliaAI/MLJBase.jl#926 · 3 comments · 1 assignee · Opened Aug 17, 2023
Provide a way to get test set predictions from `evaluate` Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

JuliaAI/MLJBase.jl#837 · 7 comments · Opened Sep 12, 2022
another function declaration issue Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaAI/MLJBase.jl#835 · 1 comment · Opened Sep 9, 2022
Use new Tables API in implementation of `selectrows` Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#791 · Opened Jun 16, 2022
Possibility of TableOperations.jl for column access Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#790 · 3 comments · Opened Jun 14, 2022
Implement efficient data utils methods for Tables.MatrixTable Open

performance

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaAI/MLJBase.jl#789 · 1 comment · 1 reaction · Opened Jun 14, 2022
Julia crashes for multithreaded Stack for some non-Julia models Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

JuliaAI/MLJBase.jl#783 · 4 comments · Opened Jun 9, 2022
Checking model instances are not types Open

good first issue

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaAI/MLJBase.jl#782 · 1 comment · 2 reactions · Opened Jun 9, 2022
Get rid of views in built in datasets such as iris Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

JuliaAI/MLJBase.jl#778 · 1 comment · Opened Jun 1, 2022
Issue informative warning if user tries to use `evaluate!(::MLJModel, ...)` instead of `evaluate(::MLJModel, ...)`. Open

easy good first issue

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaAI/MLJBase.jl#765 · 2 comments · Opened May 10, 2022
Control caching of composite models Open

design discussion enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#756 · 2 comments · Opened Apr 8, 2022
`serializable` does not remove data implicitly stored in partial functions, leading to scaling with data size and potential privacy breaches Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaAI/MLJBase.jl#750 · 6 comments · Opened Mar 25, 2022
Parallelism in Learning Networks Open

brainstorm enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#739 · 7 comments · Opened Feb 10, 2022
Fallback implementation of `implemented_methods(model)` doesn't really work. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#713 · Opened Jan 7, 2022
Wrapper to convert arbitrary clusterer into a classifying one Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#768 · Opened Nov 18, 2021
Request: Separate Out Resampling Strategies Interface Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

JuliaAI/MLJBase.jl#660 · 1 comment · Opened Oct 23, 2021
Broadcasting probabilistic `Unaggregated` measures (such as proper scoring rules) over a single prediction Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#635 · Opened Sep 10, 2021
Tracking issue: List of measures Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

JuliaAI/MLJBase.jl#609 · Opened Aug 13, 2021
Multiclass ROC and Interfacing with LightHouse.jl Open

measures

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#586 · 3 reactions · Opened Jun 25, 2021
Emigration of one-dimensional range types Open

code organization design discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#572 · 1 comment · Opened Jun 7, 2021
Something not right with serialisation of python (sk-learn) models Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

JuliaAI/MLJBase.jl#435 · 5 comments · Opened Oct 19, 2020
Return helpful error message for predict(model, Xnew) instead of predict(mach, Xnew) and so forth Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#424 · 1 reaction · Opened Sep 9, 2020
Code review to find "invalidations" triggering unnecessary re-compilation Open

latency

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaAI/MLJBase.jl#422 · 3 reactions · Opened Sep 3, 2020
Disintegration of MLJBase (discussion and tracking issue) Open

code organization version 1.0

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#416 · 12 comments · 3 reactions · Opened Aug 27, 2020
Type stabilities in performance evaluation Open

low priority performance

Difficulty 5/5 Over a week Newbie friendliness 20/100

JuliaAI/MLJBase.jl#349 · 4 comments · Opened Jun 16, 2020
AUC again Open

low priority measures suggestion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaAI/MLJBase.jl#319 · 3 comments · Opened May 23, 2020
More metrics for the finite case: EvalMetrics.jl Open

measures

Difficulty 5/5 Over a week Newbie friendliness 20/100

JuliaAI/MLJBase.jl#316 · 2 reactions · Opened May 22, 2020
taking performance issue more seriously Open

brainstorm performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#309 · 16 comments · 5 reactions · Opened May 14, 2020
Ensure packages implementing Code are threadsafe Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

JuliaAI/MLJBase.jl#298 · 2 comments · Opened May 10, 2020
Add scitype checks to predict, transform, and so forth Open

version 1.0

JuliaAI/MLJBase.jl#285 · 1 comment · 1 assignee · Opened May 3, 2020
Handling of missings Open

design discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#97 · 3 comments · Opened Nov 12, 2019
List of metrics in R and elsewhere, and which ones are implemented in MLJ Open

measures

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#95 · 11 comments · Opened Nov 12, 2019
multiclass auc Open

low priority measures

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaAI/MLJBase.jl#84 · Opened Nov 6, 2019

JuliaAI/MLJBase.jl

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