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.. _l-cheatsheet-ml: | ||
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Problèmes standard de machine learning | ||
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.. blogpost:: | ||
:title: Session 2 | ||
:keywords: session 2 | ||
:date: 2018-02-08 | ||
:categories: session | ||
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Suite : | ||
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* :ref:`l-regclass` | ||
* formalisation de la :ref:`régression <l-regression-f>`, | ||
de la :ref:`classification <l-classification-f>` | ||
* :ref:`classification multi-classe <l-multiclass>` | ||
* paramètres de régularisation, | ||
`Ridge <http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.Ridge.html>`_, | ||
`Lasso <http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.Lasso.html#sklearn.linear_model.Lasso>`_, | ||
`ElasticNet <http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.ElasticNet.html#sklearn.linear_model.ElasticNet>`_ | ||
* `clustering <http://scikit-learn.org/stable/modules/clustering.html#clustering>`_, | ||
`k-means <http://www.xavierdupre.fr/app/mlstatpy/helpsphinx/c_clus/kmeans.html>`_ | ||
un exemple avec | ||
les `vélos à Chicago <http://www.xavierdupre.fr/app/ensae_projects/helpsphinx/notebooks/city_bike_challenge.html>`_ | ||
et l'utilisation du clustering pour trouver les | ||
`profils de cyclistes à Chicago <http://www.xavierdupre.fr/app/ensae_projects/helpsphinx/notebooks/city_bike_solution_cluster_start.html>`_ | ||
* `ranking <https://github.com/dmlc/xgboost/tree/master/demo/rank>`_ | ||
* recommandations, | ||
`Factorisation de matrices non-négatives <http://scikit-learn.org/stable/modules/generated/sklearn.decomposition.NMF.html>`_, | ||
`Liens entre factorisation de matrices, ACP, k-means <http://www.xavierdupre.fr/app/mlstatpy/helpsphinx/c_ml/missing_values_mf.html>`_ | ||
* :ref:`l-cheatsheet-ml` | ||
* résumé de l'`interface scikit-learn <http://www.xavierdupre.fr/app/ensae_teaching_cs/helpsphinx3/notebooks/02_basic_of_machine_learning_with_scikit-learn.html#a-recap-on-scikit-learn-s-estimator-interface>`_ | ||
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Exercices : | ||
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* Ecrire un programme qui construire deux prédicteurs de la note d'un vin, | ||
un pour les vins blancs, un autre pour les rouges, comparer sa performance | ||
avec le même modèle appris sur l'ensemble de la base | ||
* Pourrait-on envisager l'écriture d'un régresseur un peu plus générique | ||
qui estimerait un modèle sur chacune des modalités prises par une variable de la base. | ||
On pourra s'inspirer de `SkLearnerBase <http://www.xavierdupre.fr/app/ensae_teaching_cs/helpsphinx3/ensae_teaching_cs/ml/sklearn_base_learner.html?highlight=skbaselearner#ensae_teaching_cs.ml.sklearn_base_learner.SkBaseLearner>`_. |
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