kvr2: Calculate and Compare Multiple Definitions of Coefficient of Determination

Calculate nine types of coefficients of determination (R-squared) based on the classification by Kvalseth (1985) <doi:10.1080/00031305.1985.10479448>. This package is designed for educational purposes to demonstrate how R-squared values can fluctuate depending on the choice of formula, particularly in power regression models or linear models without an intercept. By providing a comprehensive list of definitions, it helps users understand the mathematical sensitivity of goodness-of-fit indices.

Version:	0.1.0
Imports:	stats
Suggests:	knitr, rmarkdown, testthat (≥ 3.0.0)
Published:	2026-02-12
DOI:	10.32614/CRAN.package.kvr2 (may not be active yet)
Author:	Mao Kobayashi [aut, cre]
Maintainer:	Mao Kobayashi <kobamao.jp at gmail.com>
BugReports:	https://github.com/indenkun/kvr2/issues
License:	MIT + file LICENSE
URL:	https://github.com/indenkun/kvr2, https://indenkun.github.io/kvr2/
NeedsCompilation:	no
Materials:	README, NEWS
CRAN checks:	kvr2 results

Documentation:

Reference manual:	kvr2.html , kvr2.pdf
Vignettes:	The Pitfalls of R-squared: Understanding Mathematical Sensitivity (source, R code)

Downloads:

Package source:	kvr2_0.1.0.tar.gz
Windows binaries:	r-devel: not available, r-release: kvr2_0.1.0.zip, r-oldrel: kvr2_0.1.0.zip
macOS binaries:	r-release (arm64): kvr2_0.1.0.tgz, r-oldrel (arm64): kvr2_0.1.0.tgz, r-release (x86_64): kvr2_0.1.0.tgz, r-oldrel (x86_64): kvr2_0.1.0.tgz

Linking:

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