Lesson 20 of 20 · about 22 min
Boss level: a Naive Bayes spam filter
Put the whole course to work. You'll build the same kind of spam filter that rescued email inboxes in the early 2000s, from nothing but counting words and Bayes' rule. Train it on example messages, fix the two problems that break the simple version (zero counts and vanishing numbers), and measure how accurate it is on mail it has never seen.
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In this lesson you'll learn:
- Naive Bayes classifier
- Laplace smoothing and log probabilities
Free to try in F07 Probability & Statistics:
The first 3 lessons of every course are free, no account needed.