iNEXT.4steps: Four-Step Biodiversity Analysis Based on 'iNEXT'

Expands 'iNEXT' to include the estimation of sample completeness and evenness. The package provides simple functions to perform the following four-step biodiversity analysis: STEP 1: Assessment of sample completeness profiles. STEP 2a: Analysis of size-based rarefaction and extrapolation sampling curves to determine whether the asymptotic diversity can be accurately estimated. STEP 2b: Comparison of the observed and the estimated asymptotic diversity profiles. STEP 3: Analysis of non-asymptotic coverage-based rarefaction and extrapolation sampling curves. STEP 4: Assessment of evenness profiles. The analyses in STEPs 2a, 2b and STEP 3 are mainly based on the previous 'iNEXT' package. Refer to the 'iNEXT' package for details. This package is mainly focusing on the computation for STEPs 1 and 4. See Chao et al. (2020) <doi:10.1111/1440-1703.12102> for statistical background.

Version: 1.0.1
Depends: R (≥ 4.0)
Imports: ggplot2, reshape2, dplyr, stats, ggpubr, purrr, iNEXT.3D
Suggests: testthat, knitr, rmarkdown
Published: 2024-06-18
DOI: 10.32614/CRAN.package.iNEXT.4steps
Author: Anne Chao [aut, cre], KaiHsiang Hu [ctb]
Maintainer: Anne Chao <chao at>
License: GPL (≥ 3)
NeedsCompilation: no
Citation: iNEXT.4steps citation info
Materials: NEWS
CRAN checks: iNEXT.4steps results


Reference manual: iNEXT.4steps.pdf
Vignettes: A Quick Introduction to iNEXT.4steps via Examples


Package source: iNEXT.4steps_1.0.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): iNEXT.4steps_1.0.1.tgz, r-oldrel (arm64): iNEXT.4steps_1.0.1.tgz, r-release (x86_64): iNEXT.4steps_1.0.1.tgz, r-oldrel (x86_64): iNEXT.4steps_1.0.1.tgz
Old sources: iNEXT.4steps archive


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