ancova-class: Class "ancova" Analysis of Covariance

ancova-classR Documentation

Class "ancova" Analysis of Covariance


Analysis of Covariance. The class is an extension of "aov" and "lm". It is identical to the "aov" for a single factor and a single covariate plus an attribute which contains a "trellis" object. Four different models are included in the class. See ancova for the examples.

Objects from the Class

A virtual Class: No objects may be created from it.


Class "aov", directly. Class "lm", by class "aov", distance 2. Class "mlm", by class "aov", distance 2, with explicit test and coerce. Class "oldClass", by class "aov", distance 3. Class "oldClass", by class "aov", distance 4, with explicit test and coerce.


No methods defined with class "ancova" in the signature. S3-type methods are "anova.ancova", "coef.ancova", "coefficients.ancova", "model.frame.ancova", "plot.ancova", "predict.ancova", "print.ancova", "summary.ancova". "plot.ancova(x)" plots a standard lm plot of x. "print.ancova(x)" prints the anova(x) and the trellis attribute. The remaining methods use NextMethod.


Richard M. Heiberger <>


Heiberger, Richard M. and Holland, Burt (2015). Statistical Analysis and Data Display: An Intermediate Course with Examples in R. Second Edition. Springer-Verlag, New York.

See Also


HH documentation built on Aug. 9, 2022, 5:08 p.m.

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