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Julia for Data Science

You're reading from   Julia for Data Science high-performance computing simplified

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Product type Paperback
Published in Sep 2016
Publisher Packt
ISBN-13 9781785289699
Length 346 pages
Edition 1st Edition
Languages
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Author (1):
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Anshul Joshi Anshul Joshi
Author Profile Icon Anshul Joshi
Anshul Joshi
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Table of Contents (12) Chapters Close

Preface 1. The Groundwork – Julia's Environment 2. Data Munging FREE CHAPTER 3. Data Exploration 4. Deep Dive into Inferential Statistics 5. Making Sense of Data Using Visualization 6. Supervised Machine Learning 7. Unsupervised Machine Learning 8. Creating Ensemble Models 9. Time Series 10. Collaborative Filtering and Recommendation System 11. Introduction to Deep Learning

Supervised learning using Naïve Bayes


Naïve Bayes is one of most famous machine learning algorithms to date. It is widely used in text classification techniques.

Naïve Bayes methods come under the set of supervised learning algorithms. It is a probabilistic classifier and is based on Bayes' theorem. It takes the "naïve" assumption that every pair of features is independent of one another.

And in spite of these assumptions, Naïve Bayes classifiers work really well. Their most famous use case is spam filtering. The effectiveness of this algorithm is justified by the requirement of quite a small amount of training data for estimating the required parameters.

These classifiers and learners are quite fast when compared to other methods.

In this given formula:

  • A and B are events.

  • P(A) and P(B) are probabilities of A and B.

  • These are prior probabilities and are independent of each other.

  • P(A | B) is the probability of A with the condition that B is true. It is the posterior probability of class (A...

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