Please also provide the following information in addition to your question:
- Operating System: Windows
- brms Version: 2.9.0
I am trying to plot the interactions of a model with the following structure.
mod1 = brms::brm(Y ~ A*B+ C*B+ D + E+ F+ (1 |G) + (1|H), control = list(adapt_delta = 0.99, max_treedepth = 10), iter = 10000, cores = 4, data = dat6, family="categorical")
the expression marginal_effects(mod1, categorical = T) gives me the following warning.
Warning message: Interactions cannot be plotted directly if 'categorical' is TRUE. Please use argument 'conditions' instead.
I am not sure how to set the conditions, but looking at examples in the help page I tried:
conditions <- data.frame(A = c(-1, 0, 1)) marginal_effects(mod1, effects = "A:B", conditions = conditions)
but I get the error
Error: Please set 'categorical' to TRUE.
Does anybody have an example to plot interactions in categorical models?
Thanks for any suggestion.