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paul-buerkner / brms

brms R package for Bayesian generalized multivariate non-linear multilevel models using Stan
https://paul-buerkner.github.io/brms/
GNU General Public License v2.0
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Changed default parameterization for shifted lognormal family? #1305

Closed nahorp closed 2 years ago

nahorp commented 2 years ago

Hello,

I fitted 2 models, 1-2 years apart, using the shifted_lognormal() family argument (with default links). The earlier one is as below,

Screen Shot 2022-02-28 at 9 14 13 am

This is congruent with the ?brmsfamily help documentation (as below),

Screen Shot 2022-02-28 at 9 25 36 am

However, the newer one shows identity link functions (vs. log previously) for sigma and ndt parameters. Am I missing something?

Screen Shot 2022-02-28 at 9 14 26 am

Thank you for reading :)

paul-buerkner commented 2 years ago

No, this is just a change in how the summary output displays the links. The links of non-mu parameters only apply if those parameters are predicted (via a separate formula), which is now reflected in the summary output.