Hello everyone I am currently trying to conduct analysis of my graduate thesis
data using a mixed effects model and I have reached an impass. When I try to
conduct a multiple comparison, I get an error (See below): > fm3<-
lme(abovegroundbiomass.m.2~medium*amelioration*fertilizer*treatment,
random=~1|block/medium/amelioration/fertilizer) > tukeytest<-glht(fm3,
linfct=mcp(treatment="Tukey"))
Error in contrMat(table(mf[[nm]]), type = types[pm]) :
less than two groups
I wonder if anyone could help me interpret this error. Many thanks. Allan Carson
[[alternative HTML version deleted]]
______________________________________________
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.
