Is save_psis = T when calling loo from cmdstanr?

[jonah]

The default is save_psis = FALSE. I think this

@zcai

should I do this fit$loo(r_eff = T, save_psis = F)

seems like the right option based on what you described you want. It will result in calculating the r_eff values (which is good if you care about PSIS effective sample sizes and MCSE estimates) but it won’t save the psis object and should result in a smaller object compared to setting save_psis = TRUE.