Rescinded. Problem solved. I discovered that TukeyHSD doesn't like numeric factors; changing the "level" to a factor solved my problem.
SR Steven H. Ranney steven.ran...@montana.edu ______________________________________________ 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.
