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Hands-On Predictive Analytics with Python
book

Hands-On Predictive Analytics with Python

by Alvaro Fuentes
December 2018
Beginner to intermediate content levelBeginner to intermediate
330 pages
8h 32m
English
Packt Publishing
Content preview from Hands-On Predictive Analytics with Python

Random forests

As we discussed when talking about trees, one of their advantages is their simplicity; but that is also the cause of their problems—their performance is often worse than other models, especially if the tree is small, in which case we will have what is known as a weak predictor. By the end of the 1980s, two researchers, Kearns and Valiant (1988, 1989), posted the question "Can a set of weak learners create a single strong learner?" This question gave rise to a lot of research on what is known as Ensemble methods or Ensemble Learning. The core idea of Ensemble Learning is simple—instead of using just one model to make predictions, use many individual models and combine their predictions. This simple idea has been one of the keys ...

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Publisher Resources

ISBN: 9781789138719Supplemental Content