I have 3 blocks with 5 treatments within each block. We gathered
information from response variables at 5 different times on the same units -
so I have a longitudinal study.
If I call:
B: blocks - a,b,c (factor)
T: treatments - A,B,C,D,E (factor)
t: time - 15, 30, 45, 60, 75 days (continuous)
How do I write the model and how do I determine the degrees of freedom?
I am thinking of these two options:
lmer(y~t*T+(t|B)+(1|B) or
lmer(y~t*T+(t|B))
but I am not sure if either of those is correct to take into accout the random nature of the
blocks where the treatements are included.
I would really appreciate if someone could give me an insight on this.
Thanks,
Ricardo
_________________________________________________________________
¿Tienes poco tiempo? Accede a Hotmail mucho más rápido. Ver más
[[alternative HTML version deleted]]