[R] Interpretation of high order interaction terms.

[bluesky315 at gmail.com]

I have difficulties in interpreting high order interaction terms in
high-way ANOVA.

According to Introductory Statistics with R by Peter Dalgaard (Section 12.5),

"The exact definition of the interaction terms and the interpretation of their
associated regression coefficients can be elusive. Some peculiar things
happen if an interaction term is present but one or more of the main
effects are missing. The full details are probably best revealed through
experimentation."


However, I do want to understand the full details. I have checked a
few books, but I haven't found a book that describes high order
interactions in a satisfactory way. Besides learning interactions
through experimentation, could somebody let me know if there are any
detailed documentation on interactions?