Dear R-helpers, I have an ANCOVA with a significant effect of the factor, which has three levels. I wish to determine which of the levels are different from each other but, because my model was fitted with lm(), I cannot use TukeyHSD.
For some reason, I get different results (no significant effect of the factor) when I fit the model using aov() so, for the moment, I am using lm(). Could anyone point me to a test and associated R function that will work on a fitted lm() or glm()? Many thanks, Mark Na ______________________________________________ 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.
