November 2019
Intermediate to advanced
320 pages
13h 35m
French
Content preview from Machine Learning avec Scikit-Learn
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190
Chapitre 7. Apprentissage d’ensemble et forêts aléatoires
RandomForestClassifier. De même, la classe ExtraTreesRegressor a
la même API que la classe RandomForestRegressor.
Il est difficile de savoir à l’avance comment un RandomForestClassifier
va se comporter par rapport à un ExtraTreesClassifier. En général,
le seul moyen de le savoir consiste à les essayer tous les deux et à les com-
parer par validation croisée (à régler les hyperparamètres en effectuant une
recherche par quadrillage).
7.4.2 Importance des variables
Une autre grande qualité des forêts aléatoires est qu’elles permettent de mesurer faci-
lement l’importance relative des variables. ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.