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Machine Learning in Action
book

Machine Learning in Action

by Peter Harrington
April 2012
Intermediate to advanced content levelIntermediate to advanced
384 pages
11h 19m
English
Manning Publications
Content preview from Machine Learning in Action

Part 3. Unsupervised learning

This third part of Machine Learning in Action deals with unsupervised learning. This is a break from what was covered in the first two sections. In unsupervised learning we don’t have a target variable as we did in classification and regression. Instead of telling the machine “Predict Y for our data X,” we’re asking “What can you tell me about X?” Things we ask the machine to tell us about X may be “What are the six best groups we can make out of X?” or “What three features occur together most frequently in X?”

We start our study of unsupervised learning by discussing clustering (grouping similar items together) and the k-means clustering algorithm in chapter 10. Next, we look into association analysis or shopping ...

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