stan-dev / stan-dev/posterior

mcse for minimum / maximum

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Dominant language
R
Stars
171
Forks
26
Avg merge
2d 18h
Merged PRs (30d)
3

Description

It could be a useful feature to have an mcse for the minimum & maximum of a posterior distribution. This is not trivial as it requires a definition of what the tail (beyond the extremum) looks like. Maybe @avehtari can add some details as to what would be needed. However, before starting this we should also find good use cases. This issue is a follow-up from the issue on the inconsistent quantile function behaviour.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the existing MCSE and quantile-function behavior in the posterior R package, along with the earlier issue on inconsistent quantile behavior. Before implementation, identify useful cases and agree on how the tail beyond a minimum or maximum should be defined; done requires a settled specification and corresponding implementation and tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
r
Domain
data
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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