All Questions
6 questions
7
votes
2
answers
166
views
How can I use a variable as a covariate which exists only for specific range for some clusters/groups?
I want to know how to use Poisson GLMMs when we have unequal samples available for different groups/clusters/participants in data.
Imagine a study where each of the 60 participants are given 1000 ...
0
votes
1
answer
93
views
Could this variable be modeled by a poisson regression?
I have a pc experiment and an ordered response variable with 8 levels (from 0 to 7). I have also a factor (different types of stimuli) to include as a predictor in the model. So in each trial, the ...
3
votes
1
answer
2k
views
Why do I get so different estimations with glm and glmer?
I am using the glmer function (lme4 package) to get estimations in a Poisson regression model (generalized linear model).
I ...
0
votes
1
answer
366
views
Different results from poisson glmer and glmmadmb when using emmeans (lsmeans)
Why would I be getting drastically different results from glmer and glmmadmbM for the same model when using emmeans? The results from summary() are the same.
EMmeans
glmer:
...
5
votes
0
answers
7k
views
How to validate a Poisson GLMM model?
I’m using the glmer function from the lme4 package in R to model species richness adjacent ...
1
vote
1
answer
705
views
Predictions from Poisson GLMM (lme4) lower compared to GLM
I am modelling visitor counts to a sample of sites in a forest in order to predict the number of visitors to the rest of the forest.
My predictor variables are time of day (categorical), day of week (...