era

0.5.0

Year-Based Time Scales

0packages depend

8.4Kdownloads / year

98.2%test coverage

13/13checks pass

Overview

About

Maintained by Joe RoeFirst published 2021-01-294 releasesCRAN page ↗GitHub ↗

Provides a consistent representation of year-based time scales as a numeric vector with an associated 'era'. There are built-in era definitions for many year numbering systems used in contemporary and historic calendars (e.g. Common Era, Islamic 'Hijri' years); year-based time scales used in archaeology, astronomy, geology, and other palaeosciences (e.g. Before Present, SI-prefixed 'annus'); and support for arbitrary user-defined eras. Years can converted from any one era to another using a generalised transformation function. Methods are also provided for robust casting and coercion between years and other numeric types, type-stable arithmetic with years, and pretty-printing in tables.

Install

R (CRAN)pak (dev)Ubuntu (r2u)openSUSE (OBS)

install.packages("era", 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("joeroe/era")

Development version from joeroe/era. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-era

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# 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-era

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

Health

CRAN checks

13OK

Slowest check: 1.6 min · r-oldrel-windows-x86_64

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

Documentation signals are not tracked yet for this package.

Downloads

8.4K

CRAN downloads in the past year

Rank #4,774 · ~23/day · ~702/mo

era Releases R versions

Daily download trend is not available in this view yet.

45130 days

1.9K90 days

8.4K1 year

Compare downloads with other packages →

Also on95 r2u25 autocran49 c2d4u

Repository

GitHub ↗ joeroe/era

15Stars

0Forks

12Open issues

0Open PRs

6Releases

176Commits

2Contributors

rr-packagearchaeologygeologypaleontologypaleoclimatevctrs

176 commits · Last activity 2026-07-23

Repository practices

Upstream repositoryBeta

8 development-tooling and community-health practices detected across 7 families in the upstream repository

Checks run against github.com/joeroe/era on 2026-07-19.

Continuous integration (1)

GitHub Actions

Reproducibility and dev environment (1)

data-raw/

CRAN release process (2)

cran-comments.mdrevdep/

Docs source (1)

README.Rmd

Show all practices

Research and citation (1)

CITATION.cff

Lint, format, editor (1)

RStudio project

Coverage (1)

Codecov

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

13 external dependencies (excludes base and recommended)

Depends (1)

R >= 2.10

Imports (4)

vctrsmethodsrlang pillar

LinkingTo (0)

none

Suggests (10)

tibble testthat covr knitr rmarkdown dplyr spelling purrr tidyr lubridate

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (1)

Maintainer (1)

Joe Roe

Author, Maintainer

Authors (1)

Joe Roe

Author, Maintainer

Package Timeline

4 releases. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.5.0Latest
2024-11-20 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.4.1
2022-11-17 · diff ↗
unarchivedReturned to CRAN
2022-11-17
archivedRemoved from CRAN
2022-11-16
issues were not corrected in time
R
R 4.2.0 released · 2022-04-22
0.4.0
2022-03-09 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.3.1
2021-01-29
R
R 4.0.0 released · 2020-04-24

Package metadata

First published: 2021-01-29
Total releases: 4 / 5 yrs
License: MIT + file LICENSE OSI
Download size: 49 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Paleontology Time Series Analysis

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