O'Reilly logo

Mahout in Action by Ellen Friedman, Ted Dunning, Robin Anil, Sean Owen

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 15. Evaluating and tuning a classifier

This chapter covers

  • Basic considerations in evaluating classifiers
  • Using the Mahout evaluation API
  • Measuring the performance of an SGD classifier
  • Common classifier problems and how to diagnose them
  • Approaches for tuning a classifier

Because evaluation is so important, it’s built into Mahout at a fundamental level. This chapter deals mainly with stage 2 of the classification process, the evaluation and fine-tuning of a classifier to prepare for deployment and to maintain performance in production. We discuss how classifiers are evaluated at a high level and the details of using the Mahout API for evaluation, and we look at an example of how to use the Mahout API. We also present several examples ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required