iNEXT

3.0.2

Interpolation and Extrapolation for Species Diversity

7packages depend

70.4Kdownloads / year

39.3%test coverage

13/13checks pass

Overview

About

Maintained by Anne ChaoFirst published 2015-06-3013 releasesCRAN page ↗GitHub ↗

Provides simple functions to compute and plot two types (sample-size- and coverage-based) rarefaction and extrapolation curves for species diversity (Hill numbers) based on individual-based abundance data or sampling-unit- based incidence data; see Chao and others (2014, Ecological Monographs) for pertinent theory and methodologies, and Hsieh, Ma and Chao (2016, Methods in Ecology and Evolution) for an introduction of the R package.

Install

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

install.packages("iNEXT", 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("AnneChao/iNEXT")

Development version from AnneChao/iNEXT. 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-inext

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

# 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-iNEXT

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-iNEXT

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

Health

CRAN checks

13OK

Slowest check: 7.2 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.02

39.3%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-04-22
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 100%
References docs: 41%

Downloads

70.4K

CRAN downloads in the past year

Rank #1,757 · ~193/day · ~5.9K/mo

Releases R versions

Daily download trend is not available in this view yet.

4.4K30 days

14.5K90 days

70.4K1 year

Compare downloads with other packages →

Also on889 r2u36 autocran3.6K conda_forge

Repository

GitHub ↗ annechao/inext

9Stars

2Forks

1Open issues

0Open PRs

0Releases

266Commits

7Contributors

266 commits · Last activity 2025-07-31 · +12.5% stars, 30d

Stars over time

2025-05-20 · 72026-07-24 · 9

Repository practices

Upstream repositoryBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/annechao/inext on 2026-07-26.

Continuous integration (1)

Travis CI

Docs source (1)

README.Rmd

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

Dependencies

Declared dependencies

9 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.4

Imports (5)

statsgraphicsggplot2 reshape2 Rcpp

LinkingTo (1)

Rcpp

Suggests (5)

testthat knitr rmarkdown gridExtra ggthemes

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

7direct

0indirect

divvy BeeBDC MiscMetabar camtrapR ct plotthis spacc

Code & Tests

Datasets

People & History

People (3)

Maintainer (1)

Anne Chao

Author, Maintainer

Authors (3)

Anne Chao

Author, Maintainer

T. C. Hsieh

Author

K. H. Ma

Author

Listed in earlier versions (2)

Hsieh

no longer listed · 3.0.2

Package Timeline

13 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
3.0.2Latest
2025-07-30 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
3.0.1
2024-03-24 · diff ↗
R
R 4.3.0 released · 2023-04-21
3.0.0
2022-08-29 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
2.0.20
2020-01-28 · diff ↗
unarchivedReturned to CRAN
2020-01-28
archivedRemoved from CRAN
2020-01-11
check problems were not corrected in time
R
R 3.6.0 released · 2019-04-26
2.0.19
2019-01-24 · diff ↗
2.0.18
2018-12-15 · diff ↗

Show 12 earlier events

2.0.17
2018-09-19 · diff ↗
2.0.15
2018-07-09 · diff ↗
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
2.0.12
2016-11-12 · diff ↗
2.0.9
2016-05-09 · diff ↗
R
R 3.3.0 released · 2016-05-03
2.0.8
2016-04-07 · diff ↗
archivedRemoved from CRAN
2016-03-11
check problems were not corrected despite reminders
2.0.5
2015-09-18 · diff ↗
2.0.3
2015-06-30
R
R 3.2.0 released · 2015-04-16

Package metadata

First published: 2015-06-30
Total releases: 13 / 11 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 3.4
Bundled data: 7.3 KB / 4 files
Download size: 2.4 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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