references to the Bunch object Documentation Easy module:utils

#16438 opened Feb 13, 2020 by adrinjalali

2

n_jobs for DBSCAN Documentation Easy Sprint good first issue help wanted module:cluster

#16299 opened Jan 29, 2020 by sp7412

7

formatting of values in plot_confusion_matrix Enhancement good first issue module:model_selection

#16127 opened Jan 14, 2020 by amueller

6

problem in clf.coef_ for MultinomialNB Documentation Easy module:naive_bayes

#15752 opened Dec 1, 2019 by Sandy4321

4

Fix documentation of default values in all classes Sprint good first issue help wanted

#15761 opened Dec 2, 2019 by cgsavard

48

Feature importance for mixed data and/or high cardinality data Documentation Sprint good first issue help wanted

#16023 opened Jan 4, 2020 by hugwi

10

Label docstrings with versionadded / versionchanged Documentation Sprint good first issue help wanted

#15426 opened Nov 1, 2019 by jnothman

35

Add dtype parameter to KBinsDiscretizer Enhancement good first issue

#15409 opened Oct 30, 2019 by rth

7

Add `fetch_openml(..., as_frame='auto')` option Easy help wanted

#14888 opened Sep 5, 2019 by jnothman

10

OrdinalEncoder: Deprecate automatically assuming lexicographic ordering Easy help wanted

#14954 opened Sep 11, 2019 by jnothman

6

Update gridsearch example for multimetric scoring Documentation Easy help wanted

#15047 opened Sep 20, 2019 by amueller

1

Separate Contributing documentation from API how-to Documentation Easy good first issue help wanted

#14582 opened Aug 6, 2019 by jnothman

14

fit_intercept in ridge could be improved Documentation module:linear_model

#16394 opened Feb 5, 2020 by Dpananos

4

Provide an option to consider class prior in ComplementNB Easy good first issue help wanted

#14444 opened Jul 23, 2019 by qinhanmin2014

6

Attach and use sample properties in pipeline with custom transformers Documentation

#16161 opened Jan 20, 2020 by fjp

6

Parameter documentation for linear models Documentation Easy good first issue

#14452 opened Jul 23, 2019 by alexitkes

13

check_estimator is stricter that what is stated in the Estimator API doc API Documentation module:utils

#16241 opened Jan 27, 2020 by ogrisel

5

Comparison of ML Algorithms Documentation

#16157 opened Jan 19, 2020 by Kapilam

11

Missing averaging over rows Documentation module:feature_selection

#16254 opened Jan 28, 2020 by tiborsekera

1

No hyperparameter tuning demonstration for multiple algorithms and datasets Documentation

#16371 opened Feb 3, 2020 by cshih14

1

Rewrite user-guide to clarify feature_importances_ are impurity based Documentation Easy Sprint help wanted

#14528 opened Jul 30, 2019 by amueller

7

`sklearn.utils.multiclass.type_of_target` with sparse csr matrix raises ValueError Bug Easy Regression help wanted

#14860 opened Sep 1, 2019 by leonardbinet

1

Misleading plot example for Isolation Forest method Documentation help wanted module:ensemble

#16113 opened Jan 13, 2020 by pedrormjunior

4

CCA documentation could be improved Documentation module:cross_decomposition

#16177 opened Jan 22, 2020 by mortonjt

In PassiveAggressiveClassifier, inconsistency between the parameter "loss" and the attribute "loss_function_" Bug Documentation module:linear_model

#16270 opened Jan 29, 2020 by judithabk6

1

Feature request: Group aware Time-based cross validation Enhancement Moderate New Feature Sprint good first issue help wanted

#14257 opened Jul 4, 2019 by ogrisel

13

Make attributes private for SGDClassifier and SGDRegressor good first issue help wanted

#14364 opened Jul 14, 2019 by wendyhhu

9

"normalize" parameter in sklearn.linear_model should be "standardize" Documentation module:linear_model

#16445 opened Feb 14, 2020 by PythonRSAS

7

Ensure all attributes are documented Documentation Easy good first issue help wanted

#14312 opened Jul 12, 2019 by amueller

52

Run check_manifest in one of the CI setups Build / CI Easy help wanted

#13916 opened May 21, 2019 by jnothman

6

Add "anti-pattern" examples Documentation Easy help wanted

#14081 opened Jun 13, 2019 by NicolasHug

18

Lack of comparisons between regression forest split criteria Documentation module:ensemble

#16370 opened Feb 3, 2020 by morgsmss7

7

Add callable metric support for KDTree algorithm Documentation Easy

#14131 opened Jun 20, 2019 by KacperKubara

14

Add a non-selectable shell prompt ($) to static shell blocks throughout the sphinx doc Documentation Enhancement

#15308 opened Oct 21, 2019 by ogrisel

2

Bad error messages in ClassifierChain on multioutput multiclass Easy good first issue help wanted

#13339 opened Feb 28, 2019 by amueller

9

Improving API documentation for CalibratedClassifierCV Documentation

#15133 opened Oct 4, 2019 by pspachtholz

2

CountVectorizer token_pattern issue with multi Alternative regex pattern. Bug Easy help wanted

#12971 opened Jan 13, 2019 by AMHZR

15

DOC Contribution workflow for stalled and unclaimed issues / PRs Documentation Easy good first issue help wanted

#13188 opened Feb 19, 2019 by rth

13

Possible error in documentation of ElasticNetCV() Documentation good first issue

#13117 opened Feb 8, 2019 by albertotb

4

Implementing partial_fit for NearestCentroid Easy Enhancement

#12952 opened Jan 10, 2019 by dirkpadfield

21

Better documentation for n_jobs Documentation Moderate help wanted

#14228 opened Jul 1, 2019 by NicolasHug

15

Better error message when passing un-sortable data to the Encoders good first issue help wanted

#12621 opened Nov 20, 2018 by readyready15728

19

Better error message needed when accidentally supplying scalar value to parameter tuning classes Easy help wanted

#12640 opened Nov 21, 2018 by readyready15728

13

GaussianProcessRegressor multi-output underlying mechanics? Documentation help wanted

#13989 opened May 30, 2019 by bread9

var_smoothing parameter of GaussianNB isn't documented nor tested Documentation

#14054 opened Jun 9, 2019 by NicolasHug

OPTICS should support sparse matrices and precomputed distances Easy Enhancement help wanted

#11982 opened Sep 3, 2018 by jnothman

1

AdaBoost feature_importances_ should support base estimators with coef_ Easy Enhancement

#12137 opened Sep 23, 2018 by hermidalc

8

Validate MD5 checksum of downloaded ARFF in fetch_openml Easy Enhancement Sprint

#11816 opened Aug 15, 2018 by jnothman

6

Dataset tests always skipped in CI

#16340 opened Jan 31, 2020 by VarIr

3

tSNE with non-Euclidean metric should be able to square the distances API Easy Enhancement

#12401 opened Oct 17, 2018 by jnothman

6

github action to build the doc on the master branch once per week and open a new github issue whenever any new FeatureWarning / DeprecationWarning is introduced Build / CI New Feature

#16317 opened Jan 30, 2020 by ogrisel

1

Improve check_classification_targets to warn users about large number of classes and avoid redundant computation API Enhancement

#16399 opened Feb 6, 2020 by ogrisel

1

Remove fixes/compat for Python 2 Easy

#11991 opened Sep 3, 2018 by jnothman

8

TODO comment found in Glossary (Documentation) in Data Type section Documentation

#13533 opened Mar 27, 2019 by yc2311

3

Look at lgtm.com alerts for last couple of months Easy good first issue help wanted

#12167 opened Sep 26, 2018 by jnothman

9

LinearDiscriminantAnalysis.predict uses all dimensions, ignoring n_components New Feature

#16433 opened Feb 11, 2020 by fjhheras

7

Error on method_parameters with TSNE from sklearn with mahalanobis metric Easy Enhancement good first issue help wanted

#11793 opened Aug 10, 2018 by arm2arm

10

DOC Equation for Bernoulli Naive Bayes

#15565 opened Nov 7, 2019 by 779817211

Better Documentation for Density Estimation

#15250 opened Oct 14, 2019 by project-delphi

Check that zero sample weight means samples are ignored

#16298 opened Jan 29, 2020 by rth

2

Adding Documentation about creating Virtual Environment for Contribution using Anaconda

#14756 opened Aug 24, 2019 by Pakigya

3

DBSCAN is missing _pairwise property Bug Easy good first issue

#11432 opened Jul 5, 2018 by jnothman

4

column transformer assumes elements of get_feature_names() will be strings. module:feature_extraction

#16093 opened Jan 10, 2020 by mguptawork

2

Deprecate grid_scores_ everywhere, replace by cv_results_ Easy help wanted

#11198 opened Jun 4, 2018 by amueller

13

CCA sets condition in pinv2 to match with scipy < 1.3

#15667 opened Nov 19, 2019 by thomasjpfan

Allow NaNs for the target values in TransformedTargetRegressor Easy good first issue

#11339 opened Jun 21, 2018 by vahidbas

9

Metrics which are degenerate with a single sample should raise an error if passed a single sample Easy

#11435 opened Jul 5, 2018 by jnothman

3

Extracting explained variance in SparsePCA Easy Enhancement Sprint help wanted

#11512 opened Jul 14, 2018 by kimrants

14

Copy button for code block Documentation

#12512 opened Nov 3, 2018 by thoo

8

Fitting default LogisticRegression on large sparse csr np.float32 matrix fails with n_jobs > 1 Bug module:linear_model

#15924 opened Dec 19, 2019 by peay

5

Add strategy="random" to SimpleImputer Easy New Feature

#11209 opened Jun 6, 2018 by ogrisel

11

A common private module for differentiable loss functions used as objective functions in estimators API

#15123 opened Oct 3, 2019 by rth

6

Enforce positive sample_weight Enhancement help wanted

#15531 opened Nov 3, 2019 by rth

9

Document the advantage of our new GBDT

#15392 opened Oct 29, 2019 by qinhanmin2014

7

metrics.confusion_matrix far too slow for Boolean cases Performance

#15388 opened Oct 28, 2019 by GregoryMorse

17

CountVectorizer integration with ColumnTransformer is unintuitive

#15588 opened Nov 10, 2019 by beachkrp

1

META OHE / OrdinalEncoder: NaN support, unfrequent cat. and pd.Categorical

#15796 opened Dec 4, 2019 by rth

1

Changed behavior for Sparse DictVectorizer regarding Explicit Zeros in Scipy 1.3.X

#14718 opened Aug 22, 2019 by desilinguist

4

sklearn.cluster.spectral_clustering fails with `np.matrix` input Easy help wanted

#10993 opened Apr 17, 2018 by Erotemic

10

Consider using extension-helpers package for OpenMP helpers

#15917 opened Dec 18, 2019 by astrofrog

1

permutation_test_score has no user guide Documentation Easy Sprint good first issue help wanted

#10905 opened Apr 2, 2018 by amueller

5

Promote SKLEARN_SEED for consideration in __init__.py itself

#15727 opened Nov 28, 2019 by yarikoptic

1

DOC make plot_lle_digits more consistent

#14226 opened Jul 1, 2019 by glemaitre

2

Add d2_tweedie_score Enhancement

#15244 opened Oct 14, 2019 by rth

1

TruncatedSVD.fit(X).transform(X) is not the same as .fit_transform(X) Bug

#15144 opened Oct 7, 2019 by kiankd

6

Documentation paths are ambiguous on case insensitive file systems Documentation help wanted

#12712 opened Dec 2, 2018 by jnothman

8

sklearn.preprocessing.StandardScaler gets NaN variance when partial_fit with sparse data Bug module:preprocessing

#16448 opened Feb 15, 2020 by yellowshippo

9

Add MSLE(Mean Squared Logarithmic Error) to TreeRegressors New Feature module:tree

#16240 opened Jan 27, 2020 by ysunmi0427

7

TfidfVectorizer ngrams does not work when vocabulary provided Bug module:feature_extraction

#16017 opened Jan 3, 2020 by tgsmith61591

3

Crossvalidation on estimator fails when using option multioutput = 'raw_values' in make_scorer function

#15910 opened Dec 17, 2019 by gstiefel

1

Update nightly-build CI to fetch numpy and scipy wheels from elsewhere Build / CI

#16413 opened Feb 8, 2020 by ogrisel

Update the README file formatting

#15617 opened Nov 13, 2019 by erinkhoo

3

BUG: sklearn/utils/multiclass.type_of_target inconsistent for similar inputs

#14671 opened Aug 16, 2019 by maxwell-aladago

10

W and H switched in NMF docs? Documentation Easy good first issue help wanted

#10944 opened Apr 9, 2018 by amueller

7

Make sure the CI fails on Deprecation and Future warnings Build / CI Moderate help wanted

#15381 opened Oct 28, 2019 by adrinjalali

2

BernoulliNB and MultinomialNB documentation for alpha=0 Documentation Easy good first issue help wanted

#10772 opened Mar 7, 2018 by rmalouf

6

GMM covariance types examples overly complex / confusing Documentation Easy help wanted

#10863 opened Mar 23, 2018 by amueller

7

Failure of doctest for sklearn.cluster._bicluster.SpectralCoclustering on osx.

#15464 opened Nov 2, 2019 by lakrish

5

Add common test for .transform on different sparse formats help wanted

#14176 opened Jun 24, 2019 by rth

Document missing/incorrect for libsvm.predict and libsvm.predict_proba Documentation good first issue

#11097 opened May 15, 2018 by gkevinyen5418

8

Random initialisation of GMM should consider data magnitude Easy Enhancement help wanted

#10850 opened Mar 21, 2018 by jnothman

2

FeatureAgglomeration documentation error

#15259 opened Oct 15, 2019 by JeanBaptisteScellier

API: do we allow a list of generic objects as X? API

#16130 opened Jan 15, 2020 by adrinjalali

8

Precision Recall and F-score: behavior when all negative

#14876 opened Sep 3, 2019 by marctorrellas

20

`inverse_transform` of the OneHotEncoder: specified behaviour is not default Bug help wanted

#14934 opened Sep 9, 2019 by antopolskiy

3

check_estimator assumes too much about 3rd-party estimators Bug module:utils

#16311 opened Jan 30, 2020 by kasparthommen

6

test_ard_accuracy_on_easy_problem fails on CPU with AVX-512

#16097 opened Jan 11, 2020 by tbenst

OneVsRestClassifier's fit method does not accept kwargs Easy Enhancement help wanted

#10882 opened Mar 28, 2018 by klamann

12

CalibratedClassifierCV with mode = 'isotonic' has predict_proba return infinite probabilities Bug Easy Sprint help wanted

#10903 opened Apr 2, 2018 by LotusZephyr

9

Automatically force_all_finite=False in non-initial warm_start runs Easy Enhancement help wanted

#10600 opened Feb 7, 2018 by jnothman

4

Add sample_weight support to StandardScaler (and friends?) Enhancement help wanted

#15601 opened Nov 12, 2019 by amueller

9

Can't install scikit-learn package on Pycharm Mac

#15660 opened Nov 19, 2019 by huangjunru

2

Memory Error : Locally Linear Embedding Bug Easy Moderate help wanted

#10493 opened Jan 17, 2018 by ncherel

10

Make random_state descriptions more informative and refer to Glossary Documentation Moderate Sprint good first issue help wanted

#10548 opened Jan 29, 2018 by jnothman

57

Add MAPE as evaluation metric Easy Enhancement

#10708 opened Feb 26, 2018 by amueller

13

Incorrect error bar predicted by scikit-learn

#14395 opened Jul 17, 2019 by Pengfei0606

4

[Feature Request] Add class_weight parameter for multiclass wrappers

#16050 opened Jan 8, 2020 by johannfaouzi

8

Log likelihood of covariance incorrect? Bug module:covariance

#16300 opened Jan 30, 2020 by ashaffer

7

inf or -inf values in CV ruin the mean and std Bug good first issue help wanted

#10529 opened Jan 24, 2018 by icfly2

15

Implement WalkForward cross-validator for time series data. Needs Decision New Feature

#14376 opened Jul 15, 2019 by saninstein

21

Allow precomputed mask as input for MissingIndicator

#14614 opened Aug 9, 2019 by thomasjpfan

14

Silhouette score is not defined when the estimator return only 1 cluster

#15717 opened Nov 25, 2019 by rafikg

10

Order of features changes k-NN's predictions

#15592 opened Nov 11, 2019 by bmgdc

1

Enable using 2SD scaling in StandardScaler Easy Enhancement help wanted

#10864 opened Mar 23, 2018 by twolodzko

14

Classifiers may not work with arrays defining __array_function__

#14687 opened Aug 19, 2019 by TomAugspurger

16

Notes on warmstarting GridSearchCV and SuccessiveHalving API

#15125 opened Oct 3, 2019 by NicolasHug

6

API for returning datasets as DataFrames Easy Enhancement Sprint good first issue help wanted

#10733 opened Mar 1, 2018 by jnothman

54

FeatureHasher cant return order of found feature_names Easy Enhancement help wanted

#10470 opened Jan 14, 2018 by dreizehnutters

8

Inconsistency between LDA and QDA covariance estimation

#15640 opened Nov 16, 2019 by randolf-scholz

1

test_bayes.py fails Bug

#15186 opened Oct 12, 2019 by corriebar

2

Unexpected behavior of canonical correlation analysis (CCA)

#14169 opened Jun 23, 2019 by Shaul1321

3

Have Travis ensure that what's new is updated Build / CI Easy help wanted

#10451 opened Jan 11, 2018 by jnothman

11

Using ColumnTransformer when not all specified columns present in data

#15781 opened Dec 4, 2019 by larskouwenhoven

8

make_column_selector: support for cardinality selection module:compose

#15873 opened Dec 12, 2019 by mglowacki100

9

enet_path does not pass params to coordinate descent solver Easy help wanted

#10598 opened Feb 7, 2018 by jnothman

20

Remove the use of assert_raises and assert_raises_regex from the tests

#14216 opened Jun 28, 2019 by NicolasHug

27

[ENH] ICA based on AJD (SOBI, AMUSE, NSS) module:decomposition

#16051 opened Jan 8, 2020 by sweichwald

12

Make valid pairwise distance metrics (i.e. _VALID_METRICS variable) public Enhancement

#14229 opened Jul 1, 2019 by gokceneraslan

2

Building scikit-learn with gcc 9.2 in a conda env fails Build / CI

#15129 opened Oct 4, 2019 by rth

DOC: No method signature shown in API doc when method uses a decorator Documentation

#11926 opened Aug 28, 2018 by albertcthomas

6

Review hackery in KBinsDiscretizer

#14874 opened Sep 3, 2019 by amueller

1

Terrible Performance of jaccard_score Performance

#15548 opened Nov 6, 2019 by EletronicElephant

3

Transform target when using SelectFromModel API

#15154 opened Oct 8, 2019 by apptimise

2

plot_gpr_prior_posterior.py unstable Documentation help wanted

#11562 opened Jul 16, 2018 by amueller

2

OneHotEncoder incorrectly performing numerical category checks to string categories

#15616 opened Nov 13, 2019 by nims11

7

validation_curve and learning_curve should support fit_params Easy Enhancement good first issue

#10252 opened Dec 4, 2017 by jnothman

15

Add common test for huge sparse matrix help wanted

#14483 opened Jul 26, 2019 by amueller

11

Please don't configure logging in the top-level __init__.py Bug

#15122 opened Oct 3, 2019 by mdickinson

6

Examples require matplotlib 3.1.x Build / CI

#14925 opened Sep 8, 2019 by GaelVaroquaux

6

License for rendered docs repo

#13171 opened Feb 15, 2019 by justinormont

1

iForest - support for height limit (hlim) evaluation parameter Enhancement

#14977 opened Sep 13, 2019 by petibear

17

Parallel computing with nested cross-validation Documentation Easy good first issue help wanted

#10232 opened Nov 30, 2017 by mattvan83

13

wrong input into entropy function

#14497 opened Jul 28, 2019 by minhsphuc12

10

Gaussian Process kernel WhiteKernel has unhelpful "noise_level" documentation

#13605 opened Apr 10, 2019 by joseortiz3

8

In TfidfVectorizer the tfidf result does not give proper result Question

#15240 opened Oct 14, 2019 by awsmsaurabh

1

plot_precision_recall_curve and plot_roc_curve don't allow picking positive class Enhancement

#15573 opened Nov 8, 2019 by amueller

1

Enable IP Anonymization for the Google Analytics tracker of scikit-learn.org Documentation

#11499 opened Jul 12, 2018 by ogrisel

3

best_centers update problem

#13792 opened May 6, 2019 by hjcen

2

sklearn MDS vs skbio PCoA Enhancement Moderate

#15272 opened Oct 16, 2019 by maxibor

13

Average path length in iForest is inaccurate for small sizes

#15724 opened Nov 27, 2019 by Konrad0

6

Implement SLEP009: keyword-only arguments API

#15005 opened Sep 17, 2019 by jnothman

19

RuntimeError: "Cannot clone object ..." when using clone with an implementation of BaseEstimator that copies objects in get_params method

#15722 opened Nov 27, 2019 by mcarbajo

11

cross_val_score threshold adjustment Question

#15019 opened Sep 19, 2019 by tjdurant

1

Incorrect doc on GaussianProcessRegressor alpha (and example)

#13267 opened Feb 25, 2019 by Jwink3101

[Docs] Improving Cheat Sheet to include external knowledge

#13319 opened Feb 27, 2019 by srkunze

1

partial_dependence.py _grid_from_X ignores percentile specification unexpectedly Easy help wanted

#10372 opened Dec 26, 2017 by sungminkim31

2

feature: verbose flag in cluster.DBscan Question

#14947 opened Sep 10, 2019 by sloev

3

Add absolute error criterion for DecisionTreeClassifier

#15578 opened Nov 9, 2019 by tcerdaITBA

2

Make AIF360 default bias checker and mitigator in scikit-learn

#14181 opened Jun 25, 2019 by animeshsingh

10

Pandas error when using ColumnTransformer

#14690 opened Aug 20, 2019 by truythu169

2

Version 1.0 of scikit-learn

#14386 opened Jul 17, 2019 by MartinThoma

13

Tree: node_value could be float instead of double

#14747 opened Aug 24, 2019 by sdpython

Enable warnings on travis (and make sure they are reasonable) Easy help wanted

#10158 opened Nov 16, 2017 by amueller

26

Deprecate coef_ and intercept_ from OneVsRestClassifier API

#14816 opened Aug 26, 2019 by NicolasHug

3

Add QuantileTransformer to PowerTransformer example Documentation Easy good first issue help wanted

#10257 opened Dec 5, 2017 by amueller

22

Kappa score cannot return 1

#14256 opened Jul 4, 2019 by hayata-yamamoto

3

Fix warnings in examples Sprint

#14117 opened Jun 18, 2019 by adrinjalali

33

Inconsistent documentation in neighbors/classification.py

#12995 opened Jan 16, 2019 by leotrs

4

More details about the Crammer-Singer method for LinearSVM

#13556 opened Apr 2, 2019 by xhlulu

2

OneVsRestClassifier violates predict(X)==argmax(decision_function) Bug

#14124 opened Jun 19, 2019 by azrdev

3

Stale scikit-learn datasets can throw pickling errors Bug

#14328 opened Jul 13, 2019 by deniederhut

10

`test_fastica_simple[0-False]` failed in Linux py35_ubuntu_atlas

#14414 opened Jul 19, 2019 by thomasjpfan

Better selection of the default solver for Ridge based on the shape of data Enhancement Performance

#14269 opened Jul 5, 2019 by ogrisel

1

Cross val predict TypeError when having method = "predict_proba"

#13952 opened May 26, 2019 by emilmirzayev

4

calling ComplementNB.predict_proba with sparse X converts feature_log_prob_ to sparse

#13752 opened Apr 30, 2019 by kyle-pena-nlp

3

Text vectorizers clean-up / TfidfVectorizer deprecation API

#14951 opened Sep 11, 2019 by rth

1

Unclear documentation for Calinski-Harabaz Index

#12756 opened Dec 11, 2018 by iansan5653

5

Outdated instructions in advanced installation instructions for Linux Documentation Easy help wanted

#9881 opened Oct 6, 2017 by lesteve

3

scikit-learn/sklearn/manifold/locally_linear.py could have a parameter for metric type Easy

#9868 opened Oct 3, 2017 by aarondbaron

8

Add common test for constant features help wanted

#14311 opened Jul 12, 2019 by amueller

4

`FactorAnalysis.fit` isn't using EM algorithm?

#14317 opened Jul 13, 2019 by Cartman0

2

.predict_proba() for SVC produces revered results for binary classification Bug help wanted

#13662 opened Apr 17, 2019 by qihongl

17

BaggingClassifier uses Class Label as Index to Array when Voting Bug

#13587 opened Apr 6, 2019 by nicholastoddsmith

3

`pairwise_distances` produces wrong output for asymmetric similarity measures

#13403 opened Mar 6, 2019 by tttthomasssss

10

Change default copy value from True to None Needs Decision

#13986 opened May 29, 2019 by rth

14

Change KMeans n_init default value to 1. Easy

#9729 opened Sep 11, 2017 by amueller

12

Reference relevant tags in error messages raised by estimator checks

#13553 opened Apr 1, 2019 by NicolasHug

3

[AgglomerativeClustering] confusing parameter 'affinity' API

#13945 opened May 25, 2019 by ab-anssi

1

CountVectorizer sets self.vocabulary_ in transform API help wanted

#14559 opened Aug 2, 2019 by amueller

5

OpenML: avoid warning when all versions are inactive help wanted

#14829 opened Aug 28, 2019 by rth

6

Add a test to ensure that estimators do not have invalid estimator tags Enhancement

#14082 opened Jun 13, 2019 by qinhanmin2014

1

SimpleImputer strategy "most_frequent": infinite loop for categorical variables as strings Moderate Performance help wanted

#14270 opened Jul 5, 2019 by damsch

4

SGDClassifier: the validation of the parameters should be delayed until fit()

#13355 opened Mar 1, 2019 by maikia

3

Add non-strict mode to check_estimator Sprint

#13969 opened May 28, 2019 by amueller

10

TREE: public function/method to return a new estimator with a new ccp_alpha API Enhancement Needs Decision

#14038 opened Jun 7, 2019 by adrinjalali

5

Unclear behavior of max_train_size argument in TimeSeriesSplit

#13666 opened Apr 17, 2019 by mitar

2

Agglomeration clustering always returns two different clusters, even if data points are same

#13401 opened Mar 6, 2019 by rabinandan

1

Inverse Transform for Label Encoder with mixed strings and numbers returns only strings Easy help wanted

#9285 opened Jul 5, 2017 by goldsmitha

15

Benchmark NMF and SGDClassifier on MKL vs OpenBlas Easy help wanted

#9429 opened Jul 21, 2017 by amueller

27

Testcase for _pprint() is not present

#13159 opened Feb 13, 2019 by LakshKD

4

OneVsOneClassifier with KNeighborsClassifier different predictions on two-class dataset

#13617 opened Apr 11, 2019 by adiba

4

Stratified GroupKFold

#13621 opened Apr 11, 2019 by aditya1702

27

KBinsDiscretizer: allow nans Easy Enhancement Sprint help wanted

#9341 opened Jul 12, 2017 by jnothman

14

Use a safe and short repr in error messages and warning Easy

#9698 opened Sep 6, 2017 by GaelVaroquaux

13

Use modifiable global random state in tests Needs Decision

#13913 opened May 21, 2019 by rth

8

Transpose the clustering and classification comparisons Documentation Easy help wanted

#9739 opened Sep 12, 2017 by jnothman

19

precision_recall_curve should raise UndefinedMetricWarning when there are no true samples

#13043 opened Jan 24, 2019 by zjpoh

2

check_fit2d_1sample and check_fit2d_1feature expect very specific error message

#12734 opened Dec 7, 2018 by NicolasHug

5

NEP on CPython version dependency

#14449 opened Jul 23, 2019 by amueller

17

IterativeImputer not converging (at all) High Priority Moderate

#14338 opened Jul 13, 2019 by amueller

17

Add instance-level calls to estimator_checks for meta-estimators Easy help wanted

#9443 opened Jul 24, 2017 by amueller

4

pairwise_distances(X) should always have 0 diagonal

#12628 opened Nov 20, 2018 by jnothman

6

TST check_transformers_unfitted not run on some transformers

#12967 opened Jan 12, 2019 by rth

6

TREE: warm_start with ccp_alpha API Needs Decision

#14039 opened Jun 7, 2019 by adrinjalali

GridSearchCV `mean_test_score` results 0 after what appears to be a successful run

#13223 opened Feb 22, 2019 by brechmos-stsci

3

RFC Set print_changed_only=True by default for meta-estimators Needs Decision

#14008 opened Jun 1, 2019 by rth

4

No parallelization of predict_proba method of MultiOutputClassifier

#13407 opened Mar 7, 2019 by georgedouzas

sklearn.multiclass.OneVsRestClassifier documentation Documentation Easy help wanted

#9602 opened Aug 22, 2017 by kbrose

10

ColumnTransformer doesn't accept some valid Pandas column names

#13781 opened May 3, 2019 by gwerbin

4

Chi2 ignoring False / 0 cases in X

#13102 opened Feb 6, 2019 by m-bilgic

1

add lightgbm to the CI Build / CI

#14210 opened Jun 28, 2019 by adrinjalali

4

Documentation for decorated functions has incorrect source code links Bug Documentation

#10542 opened Jan 28, 2018 by vnavkal

2

repr of column transformer unhelpful

#13770 opened May 2, 2019 by amueller

6

API Inconsitency of predict and predict_proba in SVC Bug Needs Decision

#13211 opened Feb 21, 2019 by rth

30

Add class_weight feature to MLPClassifier Easy Sprint help wanted

#9113 opened Jun 12, 2017 by lucasgreene

41

PCA implementation of score_samples calculates the wrong precision matrix when whiten is True

#13898 opened May 17, 2019 by shilinng

2

Inconsistency between predict and predict_proba parameters in Pipeline

#12006 opened Sep 5, 2018 by Noctiphobia

6

Roadmap: pandas SparseDataFrame may be deprecated

#12800 opened Dec 17, 2018 by justmarkham

10

add support for groups in train_test_split Easy Sprint good first issue help wanted

#9193 opened Jun 21, 2017 by dennisobrien

34

Issue a warning when columns that are completely NAN are removed during imputation? Documentation Easy help wanted

#8781 opened Apr 23, 2017 by samuelweisenthal

5

knn predict unreasonably slow b/c of use of scipy.stats.mode Enhancement Performance help wanted

#13783 opened May 3, 2019 by amueller

9

Pandas Interoperability section in User Guide Documentation help wanted

#10453 opened Jan 11, 2018 by jnothman

1

Dask Joblib backend cancels required futures Bug

#12315 opened Oct 6, 2018 by mrocklin

2

pca score/score_samples function throw ValueError when n_samples is less than n_features

#12489 opened Oct 30, 2018 by shilinng

BayesianGaussianMixture: Wrong documentation on mean_precision_prior

#12273 opened Oct 4, 2018 by gmeisl

5

Documentation error in GaussianMixture Documentation help wanted

#10141 opened Nov 14, 2017 by rdturnermtl

9

Online implementation of Non-negative Matrix Factorizarion (NMF)

#13308 opened Feb 27, 2019 by pcerda

7

Need contribute docs on what to consider when building a meta-estimator Documentation Moderate Sprint help wanted

#10315 opened Dec 14, 2017 by jnothman

5

Tests for sample order invariance in estimator_checks Easy help wanted

#8695 opened Apr 3, 2017 by jnothman

8

MultiOutputClassifier doesn't support sparse y Easy help wanted

#8730 opened Apr 12, 2017 by fedorzh

8

Doc consistency

#11450 opened Jul 6, 2018 by NicolasHug

4

Scikit-learn doc could give more hints of it playing well with pandas Documentation

#10165 opened Nov 18, 2017 by chrish42

7

Implement `nbytes` or `__sizeof__` (or equivalent) for estimators Easy Enhancement good first issue help wanted

#8642 opened Mar 24, 2017 by jcrist

21

CalibratedClassifierCV doesn't interact properly with Pipeline estimators Easy Enhancement good first issue help wanted

#8710 opened Apr 6, 2017 by stoddardg

18

RandomizedSearchCV: warnings cannot be suppressed

#12939 opened Jan 8, 2019 by yihengli

8

Incorrect calculations of homogeneity, completeness and v-measure

#13058 opened Jan 28, 2019 by royklip

5

Add example of creating a static transformer for transfer learning using joblib or onnx deserialisation

#13288 opened Feb 26, 2019 by jnothman

6

Cluster evaluation user guide should be split in supervised and unsupervised, possibly with a table summarizing them. Documentation Easy

#8646 opened Mar 25, 2017 by amueller

7

Sklearn.svm.SVC,the "predict" method predict all samples to same one label, which is wrong.

#12408 opened Oct 18, 2018 by yucc2018

7

Public n_features_ attribute in BaseBagging

#12260 opened Oct 3, 2018 by albertcthomas

3

Docstring of Gaussian processes kernel wrong about the calculation of gradient Documentation Easy

#8393 opened Feb 18, 2017 by dalmia

3

Should all test cases set the random_state? Easy

#8194 opened Jan 12, 2017 by erikcs

12

Metric invariance tests for multiclass and multilabel Easy help wanted

#8589 opened Mar 15, 2017 by jnothman

3

New recommended ways to write (in)equality assertions in tests

#13180 opened Feb 17, 2019 by NicolasHug

2

Label Spreading: knn Kernel Variant differs from Reference Paper

#11784 opened Aug 9, 2018 by markusdosch

5

Add a score_samples method to Pipeline and *SearchCV Enhancement

#12542 opened Nov 7, 2018 by Y-oHr-N

4

Tutorial on how to create a new kernel? Documentation help wanted

#9601 opened Aug 22, 2017 by DiegoRomeres

7

VotingClassifier .fit() does not trigger setting .model attribute for KerasClassifier objects

#12129 opened Sep 21, 2018 by LarsDu

9

Feature Request: Optimal Cut-offs for F1 score, accuracy for multi-class

#12425 opened Oct 19, 2018 by soodoku

1

KBinsDiscretizer(strategy='quantile') should subsample the training data when n_samples > 1e5 help wanted

#12492 opened Oct 30, 2018 by ogrisel

4

Document `length_scale_bounds="fixed"` in GP kernels. Documentation Easy good first issue help wanted

#8358 opened Feb 15, 2017 by MechCoder

6

Add paired test for cross-validation Enhancement Moderate Sprint help wanted

#12730 opened Dec 6, 2018 by amueller

16

LDA covariance shrinkage 'auto' bug

#12662 opened Nov 23, 2018 by xiaoxionglin

2

new feature: add LOBPCG as an SVD solver in PCA

#12079 opened Sep 14, 2018 by lobpcg

4

FastICA whitening problem (Bug) Bug help wanted

#13056 opened Jan 28, 2019 by hafezmg48

9

new feature: add LOBPCG solver to Truncated PCA

#12080 opened Sep 14, 2018 by lobpcg

2

Warnings in common tests about set_params

#12652 opened Nov 22, 2018 by amueller

7

add clustering examples from 2017 Streaming Partition MIT/AWS/IEEE Challenge Datasets with Known Truth Partitions

#12235 opened Oct 1, 2018 by lobpcg

1

Add calibration curve to plotting module Easy help wanted

#8425 opened Feb 21, 2017 by amueller

12

doc suggestion for GaussianProcessRegressor -- alpha --

#11770 opened Aug 7, 2018 by ggrrll

Improvements to check_array to handle heterogenous / object data Enhancement help wanted

#12148 opened Sep 24, 2018 by jorisvandenbossche

Add more didactic scaling example?

#12282 opened Oct 4, 2018 by amueller

new feature: add clusterQR method to 'kmeans' and 'discretize' in spectral clustering

#12164 opened Sep 26, 2018 by lobpcg

4

Remove Hardcoded Thresholds in Repr

#11897 opened Aug 23, 2018 by ben-ix

5

test_logistic::test_dtype_match failure on 32 bit Windows Blocker Bug help wanted

#11908 opened Aug 24, 2018 by rth

6

Is there a way in this package to implement semi supervised regression?

#12752 opened Dec 11, 2018 by yuanqingye

3

Fix / simplify margin plotting in SVM examples Documentation Easy

#8501 opened Mar 3, 2017 by amueller

9

Ensure ColumnTransformer also works with empty slices as column selector

#12162 opened Sep 25, 2018 by jorisvandenbossche

1

fetch_openml: Return a numeric target for multilabel problems Enhancement Moderate help wanted

#11820 opened Aug 15, 2018 by jnothman

2

Non-standard density estimation scores Documentation Easy help wanted

#8327 opened Feb 9, 2017 by rfeinman

4

Plea to not use datasets with duplicate samples in SVC tests

#12738 opened Dec 7, 2018 by oleksandr-pavlyk

6

Segfault when passing Criterion object to Forest ensembles with n_jobs>1

#12623 opened Nov 20, 2018 by wyegelwel

13

Adding a robots.txt to the website Documentation

#8958 opened May 30, 2017 by GaelVaroquaux

3

Allow alpha in GaussianProcessRegressor at fit time? Easy

#7821 opened Nov 3, 2016 by MechCoder

2

Avoid np.asarray call in check_array for duck-typed arrays

#11447 opened Jul 5, 2018 by mrocklin

17

Handle missing values in OneHotEncoder Moderate help wanted

#11996 opened Sep 4, 2018 by jnothman

11

Obscure remark about removing pos_label from weighted f1 score

#11148 opened May 26, 2018 by amueller

7