12. Analysis of Covariance

  1. Michael J. Crawley

Published Online: 6 NOV 2012

DOI: 10.1002/9781118448908.ch12

The R Book, Second Edition

The R Book, Second Edition

How to Cite

Crawley, M. J. (2012) Analysis of Covariance, in The R Book, Second Edition, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781118448908.ch12

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

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Keywords:

  • analysis of covariance;
  • ANCOVA, elements from regression/analysis of variance;
  • analysis of covariance in R;
  • output from analysis of covariance and hand calculation;
  • ANOVA table for the full model;
  • criterion used, AIC, a ‘penalized log-likelihood’;
  • ANCOVA and experimental design;
  • ANCOVA with two factors and one continuous covariate;
  • ANCOVA models, contrasts and parameters;
  • order matters in summary.aov

Summary

This chapter contains sections titled:

  • Analysis of covariance in R

  • ANCOVA and experimental design

  • ANCOVA with two factors and one continuous covariate

  • Contrasts and the parameters of ANCOVA models

  • Order matters in summary.aov