Extract draws object for the posterior package from a stanreg object?

Interfaces rstanarm
1

I’d like to extract a draws object from a stanreg object created with Rstanarm for use with the posterior package’s functions. But I don’t know how to do this, read the posterior functions reference but still have no clue. Using as_draws(stanreg_object) throws an error: Error: All variables in all chains must have the same length. Which seems strange to me, as all chains are of the same length…

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The support for this will eventually be added to rstanarm (which has had unbelievable bad luck for long time to get new version to cran). Meanwhile you can use

as_draws(sanreg_object$stanfit)
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