Calculate and Compare Multiple Definitions of Coefficient of Determination R package kvr2 version 0.2.0 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. Software Imports: insight, ggplot2, grid, stats, tidyr Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Mao Kobayashi <kobamao.jp@gmail.com> Comprehensive R Archive Network (CRAN) Mao Kobayashi [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=kvr2/LICENSE) 2026-03-10 application/tgz https://CRAN.R-project.org/package=kvr2 doi:10.32614/CRAN.package.kvr2