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Machine Learning with scikit-learn Quick Start Guide

You're reading from   Machine Learning with scikit-learn Quick Start Guide Classification, regression, and clustering techniques in Python

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789343700
Length 172 pages
Edition 1st Edition
Languages
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Author (1):
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Kevin Jolly Kevin Jolly
Author Profile Icon Kevin Jolly
Kevin Jolly
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Table of Contents (10) Chapters Close

Preface 1. Introducing Machine Learning with scikit-learn FREE CHAPTER 2. Predicting Categories with K-Nearest Neighbors 3. Predicting Categories with Logistic Regression 4. Predicting Categories with Naive Bayes and SVMs 5. Predicting Numeric Outcomes with Linear Regression 6. Classification and Regression with Trees 7. Clustering Data with Unsupervised Machine Learning 8. Performance Evaluation Methods 9. Other Books You May Enjoy

Support vector machines

In this section, you will learn about support vector machines (SVMs), or, to be more specific, linear support vector machines. In order to understand support vector machines, you will need to know what support vectors are. They are illustrated for you in the following diagram:

The concept of support vectors

In the preceding diagram, the following applies:

  • The linear support vector machine is a form of linear classifier. A linear decision tree boundary is constructed, and the observations on one side of the boundary (the circles) belong to one class, while the observations on the other side of the boundary (the squares) belong to another class.
  • The support vectors are the observations that have a triangle on them.
  • These are the observations that are either very close to the linear decision boundary or have been incorrectly classified.
  • We can define...
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