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A Python implementation of Naive Bayes from scratch.
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Latest commit fed89e9 Mar 27, 2018

Naive Bayes from Scratch in Python

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A custom implementation of a Naive Bayes Classifier written from scratch in Python 3.

Bayes Theorem

From Wikipedia:

In machine learning, naive Bayes classifiers are a family of simple probabilistic classifiers based on applying Bayes' theorem with strong (naive) independence assumptions between the features.


Loan Defaulters

Home Owner Marital Status Annual Income Defaulted Borrower
Yes Single $125,000 No
No Married $100,000 No
No Single $70,000 No
Yes Married $120,000 No
No Divorced $95,000 Yes
No Married $60,000 No
Yes Divorced $220,000 No
No Single $85,000 Yes
No Married $75,000 No
No Single $90,000 Yes

Source: Introduction to Data Mining (1st Edition) by Pang-Ning Tan

Figure 5.9, Page 230

How to Run

Please run with Python 3 or greater.

python main

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