Hi, can anyone tell me how to nest two fixed factors using glmer in lme4? I have a split-plot design with two fixed factors - A (whole plot factor) and B (subplot factor), both with two levels. I want to do GLMM as I also want to include different plots as a random factor. But I am interested on the effect of A a B and their interaction on the response variable. I tried this:glmer(response~A*B+(A/B)+(1|C),data=Exp2,family=poisson but it gives the same output as if I removed (A/B) all together or used (A:B) instead thus the output is the same as: glmer(response~A*B+(1|C),data=Exp2,family=poisson anyone can help with how I define this nesting, so that data are analysed correctly given my split-plot design? thanks, Martina
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