Please read the first two paragraphs of Details from ?formula
Ok, I just did. So, If I understand this properly, the term Plot*Day would include both the main effects of a and b and their second order interactions. So it could be written Plot + Day + Plot:Day. The term Plot:Day includes only the second order interactions of Plot and Day. So would that make this model redundant: Rs ~ Plot + Day + Plot:Day Since it includes the main effects of Plot and Day twice? Thanks. -- View this message in context: http://r.789695.n4.nabble.com/ANOVA-1-too-few-degrees-of-freedom-tp3493349p3514828.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
