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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

Chapter 12. What's Next?

Throughout this book, we have learned about ensemble learning and explored its applications in many scenarios. In the introductory chapter, we looked at different examples, datasets, and models, and found that there is no single model or technique that performs better than the others. This means that our guard should always be up when dealing with this matter, and hence the analyst has to proceed with extreme caution. The approach of selecting the best model from among the various models means that we reject all of the models whose performance is slightly less than that of the others, and hence a lot of resources are wasted in pursuit of the best model.

In Chapter 7, The General Ensemble Technique, we saw that if we have multiple classifiers with each classifier being better than a random guess, majority voting of the classifiers gives improved performance. We also saw that with a fairly good number of classifiers, the overall accuracy of the majority...

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