I’m using Arviz to check the LOO and WAIC of two models. However, when I code something like this:
az.compare(dataset_dict = {“hierarchical”: trace_dag, “pooled”: trace_ppc1}, var_name= [‘pred_col’]),
the error message mentioned in the title will appear. How should I deal with it?
Second, as I checked the source code of arviz.loo and arviz.waic, I found that arviz.loo calculates the elpd_loo, but arviz.waic calculates true WAIC, which is elpd_waic minus variance. Am I right?