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Hands-On Ensemble Learning with R

You're reading from   Hands-On Ensemble Learning with R A beginner's guide to combining the power of machine learning algorithms using ensemble techniques

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Product type Paperback
Published in Jul 2018
Publisher Packt
ISBN-13 9781788624145
Length 376 pages
Edition 1st Edition
Languages
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Author (1):
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Prabhanjan Narayanachar Tattar Prabhanjan Narayanachar Tattar
Author Profile Icon Prabhanjan Narayanachar Tattar
Prabhanjan Narayanachar Tattar
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Table of Contents (15) Chapters Close

Preface 1. Introduction to Ensemble Techniques FREE CHAPTER 2. Bootstrapping 3. Bagging 4. Random Forests 5. The Bare Bones Boosting Algorithms 6. Boosting Refinements 7. The General Ensemble Technique 8. Ensemble Diagnostics 9. Ensembling Regression Models 10. Ensembling Survival Models 11. Ensembling Time Series Models 12. What's Next?
A. Bibliography Index

The xgboost package

The xgboost R package is an optimized, distributed implementation of the gradient boosting method. This is an engineering optimization that is known to be efficient, flexible, and portable—see https://github.com/dmlc/xgboost for more details and regular updates. This provides parallel tree boosting, and therefore has been found to be immensely useful in the data science community. This is especially the case given that a great fraction of the competition winners at www.kaggle.org use the xgboost technique. A partial list of Kaggle winners is available at https://github.com/dmlc/xgboost/tree/master/demo#machine-learning-challenge-winning-solutions.

The main advantages of the extreme gradient boosting implementation are shown in the following:

  • Parallel computing: This package is enabled with parallel processing using OpenMP, which then uses all the cores of the computing machine
  • Regularization: This helps in circumventing the problem of overfitting by incorporating...
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