I have a model which I fitted in Stan and now I am trying to determine how well it fits the data. To do so, I’ve been using the bayesplot package on the Stan objects. Let us define the empirical value found in the data as y and the estimated value with Stan as y_rep. One of the plots provided by th…

It sounds like you might be thinking of the ppc_dens_overlay function (if your outcome is continuous) or the ppc_hist function (if your outcome is counts). These functions take several draws from the posterior (ten by default) and then plot them along with the actual outcome from the data used to fi…

Using average of the posterior draws for posterior predictive checking?

Modeling

scholz November 28, 2022, 8:33pm 2

Maybe I am misreading your post but it sounds like posterior_predict vs posterior_epred (Expected Value of Posterior vs. Posterior of Expected Value with epred - #2 by scholz).

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Using average of the posterior draws for posterior predictive checking?

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