November 2019
Intermediate to advanced
320 pages
13h 35m
French
Content preview from Machine Learning avec Scikit-Learn
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7.2 Bagging et pasting
185
© Dunod – Toute reproduction non autorisée est un délit.
Autrement dit, le bagging et le pasting permettent tous deux de prélever plusieurs
fois des observations d’entraînement et de les utiliser avec plusieurs prédicteurs, mais
seul le bagging permet de réutiliser plusieurs fois des observations d’entraînement
pour le même prédicteur. Le processus d’échantillonnage et d’entraînement est repré-
senté sur la gure 7.4.
Figure 7.4 – Le bagging et le pasting impliquent l’entraînement de plusieurs prédicteurs
sur différents échantillons aléatoires du jeu d’entraînement
Une fois que tous les prédicteurs ont été entraînés, l’ensemble ...
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