I am feeling my way in the use of GLM's and have come across a warning whilst
manually simplifying a model with interaction terms, removing terms one at a
time from the maximum model (R1.9.0).
model-glm(midpnts~(AET+tempave+tempvar+MDE+sqrtarea)^2+Lat,family=poisson,weights=weightS)
I've been told that you may be able to help.
I have a complex linear model with multiple two-way interaction terms. Is
there a way to view the interaction terms in a 3d plot equivalent to the S
functions:
plan-interp(x,y,z)
image(plan)
where x and y are my explanatory variables and z my
