Transcription of CHAPTER 2 Estimating Probabilities
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CHAPTER 2 Estimating Probabilities
CHAPTER 2 Estimating ProbabilitiesMachine LearningCopyrightc 2017. Tom M. Mitchell. All rights reserved.*DRAFT OF January 26, 2018**PLEASE DO NOT DISTRIBUTE WITHOUT AUTHOR SPERMISSION*This is a rough draft CHAPTER intended for inclusion in the upcoming secondedition of the textbookMachine Learning, Mitchell, McGraw are welcome to use this for educational purposes, but do not duplicateor repost it on the internet. For online copies of this and other materialsrelated to this book, visit the web site send suggestions for improvements, or suggested exercises, machine learning methods depend on probabilistic approaches. Thereason is simple: when we are interested in learning some target functionf:X Y, we can more generally learn the probabilistic functionP(Y|X).
scribes joint probability distributions over many variables, and shows how they can be used to calculate a target P(YjX). It also considers the problem of learning, or estimating, probability distributions from training data, pre-senting the two most common approaches: maximum likelihood estimation and maximum a posteriori estimation.
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