Matthew Kay

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This seems related to (or an alternative to?) #44

Unless I'm misunderstanding that is pretty close to what spread_draws / gather_draws are for in tidybayes (amongst other things).

Yeah! Long term I'd like to replace `tidybayes::tidy_draws()` with (or have it be a wrapper around) `posterior::as_draws_df()`. The other functions in tidybayes use `tidy_draws()` internally, so once that change happens...

> One way of differentiating between tidybayes and posterior functions could be whether data or ploting is involved in addition to posterior draws. So whatever only handles draws could (potentially)...

I agree the split between posterior / tidybayes is clear now. Re: the original purpose of this issue (array reshaping utility functions), I wonder if @statscats @lauken13 @jgabry have thoughts...

Thanks for starting this! `get_indices()` is a little generic. Maybe `parse_variable_indices()`? Also, unless I've missed something the `.dimnames` information is not returned anywhere. This is needed inside as_draws_rvars to rename...

> Note that it treats the columns independently in the sense that, despite that the first column is not one-indexed (and therefore doesn't get filled in with the full sequence...

Thanks, I think there's a couple of different issues here. > weight_draws() is not defined for draws_rvars It is, I think you were using it on an `rvar` not a...

I looked into this more for `rvar`s and in principle I think it is possible without *too* much surgery. Since we already have a common function that is used to...