fibr

0.1.1

Prior-Fraction Diagnostics for Hierarchical Models

0packages depend

131downloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Aidan D BindoffFirst published 2026-06-291 releasesCRAN page ↗GitHub ↗

Computes the prior fraction, the per-group pooling or shrinkage factor, for hierarchical models, including directly from 'brms' fits. For each group-level coefficient the prior fraction is the share of the posterior precision contributed by the shrinkage prior relative to the likelihood; values near one indicate a coefficient that is prior-dominated (the centring/non-centring funnel regime), values near zero indicate a likelihood-dominated coefficient that is well identified from the data. These quantities are invisible to standard convergence diagnostics such as R-hat and effective sample size, and they indicate where a non-centred reparameterisation is likely to help. A companion advisor reports the same decomposition for changepoint random effects fitted with 'smoothbp'. The underlying geometry (the Fisher-metric connection on the base-fiber split, for which this connection is flat so the obstruction is statistical rather than geometric) is described in Bindoff (2026) doi:10.5281/zenodo.20724550; code reproducing the paper is in the package's source repository.

Install

R (CRAN)pak (dev)Fedora (COPR)openSUSE (OBS)

install.packages("fibr", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("ABindoff/fibr")

Development version from ABindoff/fibr. Installs pak first if it is not already available.

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-fibr

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-fibr

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 59 s · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.70

not tracked

Coverage

100%

Documentation · exports

None

Vignettes

Yes

README

Dependencies · direct

Check history

OK2026-06-30
7 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Downloads

131

CRAN downloads in the past year

Rank #24,265 · ~0/day · ~11/mo

fibr Releases R versions

Daily download trend is not available in this view yet.

13130 days

13190 days

1311 year

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Repository

GitHub ↗ abindoff/fibr

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1.0

Imports (2)

posterior ggplot2

LinkingTo (0)

none

Suggests (4)

brms smoothbp cmdstanr testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 1,010 (84%)Rd 194 (16%)

Code characteristics

Object systems

S36

Cyclomatic complexity: 2.0 median / 19 max
Test cases: 22 / 0.70 per code line
Documented parameters: 100%
System requirements: 3 external

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

13 2 exported

Complexity

4 avg / 19 max

Call network

13 nodes / 3 edges

Test coverage has not been measured for this package yet; nodes fall back to a neutral fill.

Call graph

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Lowest coverage

Per-function coverage is not measured for this package yet.

People & History

People (1)

Maintainer (1)

Aidan D Bindoff

Author, Maintainer

Authors (1)

Aidan D Bindoff

Author, Maintainer

Release timeline

1 release. R releases are shown for context.

0.1.1Latest
2026-06-29 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-06-29
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Additional repositories: stan-dev.r-universe.dev
Minimum R: ≥ 4.1.0
Download size: not tracked yet
Installed size: not tracked yet
With dependencies: not tracked yet