stan-dev / stan-dev/rstan

make output of optimizing() consistent without output of stan()

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enhancement
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R
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Description

David Chudzicki suggested this enhancement in mail to stan-users of Feb 3, which I excerpt here:

Calling the extract method on a stanfit object (returned by sampling or stan) puts the parameters in a very convenient form for working with. Is there a nice way to get the parameters resulting from optimizing in a similarly convenient form?

Naively, it seems to me like maybe it would make sense for the return value of optimizing to share a class with the return value of sampling. We do some of the same things with both types of fits, and I'd like the way I handle them to be similar. Maybe optimizing should give you a stanfit object with 1 chain and 1 iteration? Or maybe they're different subclasses of the same parent class?

Right now the return is a simple list rather than an object like the stanfit object.

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Research direction

Start by comparing the simple list returned by optimizing with the stanfit object returned by sampling or stan, including how the extract method is used. Define what a consistent return representation should provide, then verify that optimizing results support the same convenient parameter workflow.

Written by the indexing model from the issue text.

Assessment

Tech stack
r
Domain
api
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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