CHAPTER 2

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Spam or Ham?

Automatically Detect spam in Text Using Bayes’ Theorem

If you use email (I suspect you do!), chances are that you see machine learning at work on a daily basis. Your email client probably includes some spam filter mechanism, which automatically identifies blatantly unwanted promotional materials in your incoming messages and discreetly sends them into oblivion in a “spam folder.” It spares you the annoyance of having to delete these messages manually one by one; it will also save you from inadvertently clicking potentially harmful links. This is typical of how machine learning, when well done, can make human life better. ...

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