I have no problem setting up my mixed model, or performing anova or lsmeans
on my model’s outputs. However, performing lsd mean separation is giving me
fits.
So I do not have a problem when using two-way anova model. When using the
code:
fit.yield.add <- lm(data = ryzup, Yield ~ Rep + Nitrogen + Treatment)
LSD.test(fit.yield.add, trt = "Nitrogen", alpha = 0.1, console = TRUE)
It works beautifully. However when I run a mixed model:
yield.lmer <- lmer(data = ryzup, Yield ~ Nitrogen + Treatment +
(1|Rep/Nitrogen), REML = FALSE)
LSD.test(yield.lmer, trt = "Nitrogen", alpha = 0.1, console = TRUE)
It gives me fits. It produces errors like:
Error in as.data.frame.default(x[[i]], optional = TRUE) :
cannot coerce class "structure("merModLmerTest", package = "lmerTest")"
to a data.frame
Do you have any suggestions for that?
Thanks
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