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era  

Year-Based Time Scales
View on CRAN: Click here


Download and install era package within the R console
Install from CRAN:
install.packages("era")

Install from Github:
library("remotes")
install_github("cran/era")

Install by package version:
library("remotes")
install_version("era", "0.5.0")



Attach the package and use:
library("era")
Maintained by
Joe Roe
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2021-01-29
Latest Update: 2024-11-20
Description:
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.
How to cite:
Joe Roe (2021). era: Year-Based Time Scales. R package version 0.5.0, https://cran.r-project.org/web/packages/era. Accessed 13 Aug. 2026.
Previous versions and publish date:
(2026-07-30 18:50), 0.3.1 (2021-01-29 10:00), 0.4.0 (2022-03-09 16:30), 0.4.1 (2022-11-17 14:10), 0.5.0 (2024-11-20 13:40)
Other packages that cited era R package
View era citation profile
Other R packages that era depends, imports, suggests or enhances
Complete documentation for era
Functions, R codes and Examples using the era R package
Some associated functions: era-rlang . era-vctrs . era . era_parameters . era_year . era_year_parameters . eras . is_era . is_era_year . is_yr . this_year . yr . yr_era . yr_transform . 
Some associated R codes: era-package.R . s3-era.R . s3-era_year.R . s3-yr.R . transform.R . utils-date.R .  Full era package functions and examples
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