18. Generalized Additive Models

  1. Michael J. Crawley

Published Online: 6 NOV 2012

DOI: 10.1002/9781118448908.ch18

The R Book, Second Edition

The R Book, Second Edition

How to Cite

Crawley, M. J. (2012) Generalized Additive Models, in The R Book, Second Edition, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781118448908.ch18

Author Information

  1. Imperial College London at Silwood Park, UK

Publication History

  1. Published Online: 6 NOV 2012
  2. Published Print: 7 DEC 2012

ISBN Information

Print ISBN: 9780470973929

Online ISBN: 9781118448908



  • generalized additive models;
  • non-parametric smoothers;
  • non-parametric smoothers, fitting a curve through scatterplot;
  • smooth function and step function comparison, using a tree model;
  • generalized additive models, technical aspects;
  • example with strongly humped data;
  • generalized additive models with binary data;
  • three-dimensional graphic output from gam;
  • formulae involving nested (two-dimensional) terms


This chapter contains sections titled:

  • Non-parametric smoothers

  • Generalized additive models

  • An example with strongly humped data

  • Generalized additive models with binary data

  • Three-dimensional graphic output from gam