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Hello all, I have been using gstat to krige temperature data with elevation as external drift. feb01.meantemp.krig<-krige(MEANTEMP~elevation, locations= feb01.meantemp, newdata=elevation, model=feb01.meantemp.r) I keep encountering the warning message: Error: cannot allocate...
Hello all, I am using AIC to select the best model from a model set. I am confused about what models to include when there are cross-level interactions. Here is the model: model <- glmer(Y ~ V1 * V2 + (V1|SITE...
Hello all, I am trying to select between two models that differ in their random effects. Running a likelihood test gives me a different result than using information criteria. My models: model.1 <- glmer(Y ~ V1 + V2 + V1:V2 + (V2...
Thank you very much for your informative response. I guess I'm confused about how to interpret overdispersion. Using the Zuur et al. Owls data that you also present in your worked example, I ran the following models, keeping the...
Ah, yes, I forgot one key piece of information. The treatments were added sequentially in time at the site. In Site #1, treatment A was applied, measurements taken, then treatment B was applied, etc. A proper control period (4 days...
Hello, I am at my wit's end with regards to specifying my model, perhaps because I am confused about nested vs. crossed grouping factors. My dataset has 16 sites and within each site I applied 3 treatments (A, B...
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