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You're reading from Statistics for Machine Learning

Product typeBook

Published inJul 2017

Reading LevelIntermediate

PublisherPackt

ISBN-139781788295758

Edition1st Edition

Languages

Python

Concepts

Statistics

Author (1)

Pratap Dangeti

AdaBoost classifier

Boosting is another state-of-the art model that is being used by many data scientists to win so many competitions. In this section, we will be covering the AdaBoost algorithm, followed by gradient boost and extreme gradient boost (XGBoost). Boosting is a general approach that can be applied to many statistical models. However, in this book, we will be discussing the application of boosting in the context of decision trees. In bagging, we have taken multiple samples from the training data and then combined the results of individual trees to create a single predictive model; this method runs in parallel, as each bootstrap sample does not depend on others. Boosting works in a sequential manner and does not involve bootstrap sampling; instead, each tree is fitted on a modified version of an original dataset and finally added up to create a strong classifier:

The preceding figure is the sample methodology on how AdaBoost works. We will cover step-by-step procedures in detail...

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Statistics for Machine Learning

Published in: Jul 2017Publisher: PacktISBN-13: 9781788295758

Author (1)

Pratap Dangeti

Pratap Dangeti develops machine learning and deep learning solutions for structured, image, and text data at TCS, analytics and insights, innovation lab in Bangalore. He has acquired a lot of experience in both analytics and data science. He received his master's degree from IIT Bombay in its industrial engineering and operations research program. He is an artificial intelligence enthusiast. When not working, he likes to read about next-gen technologies and innovative methodologies.
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AdaBoost classifier

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