I have a binary outcome observed longitudinally. I specified a logistic model with a random intercept using Stan and got point and interval estimates of my odds ratios of interest.
When I originally ran the sampling, I didn’t write a generated quantities block. But now I want to go back and do some posterior predictive checks. I could write a generated quantities block using the existing *_rng functions, but I don’t want to re-do the sampling as it takes a while.
Is there any way I can write an additional Stan file with a generated quantities block and then feed it the posterior samples I already have so it won’t need to re-do the sampling?
Or am I stuck and need to redo the sampling?