codingMatrices (version 0.3.2)
Alternative Factor Coding Matrices for Linear Model Formulae
Description
A collection of coding functions as alternatives to the standard
functions in the stats package, which have names starting with 'contr.'. Their
main advantage is that they provide a consistent method for defining marginal
effects in factorial models. In a simple one-way ANOVA model the
intercept term is always the simple average of the class means.