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SQIpro
View on CRAN: Click
here
Download and install SQIpro package within the R console
Install from CRAN:
install.packages("SQIpro")
Install from Github:
library("remotes")
install_github("cran/SQIpro") Install by package version:
library("remotes")
install_version("SQIpro", "0.1.0") Attach the package and use:
library("SQIpro")
Maintained by
Sadikul Islam
[Scholar Profile | Author Map]
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2026-04-20
Latest Update: 2026-04-20
Description:
Provides a comprehensive, modular framework for computing the Soil Quality Index (SQI) using six established methods: Linear Scoring (Doran and Parkin, 1994, <doi:10.2136/sssaspecpub35.c1>), Regression-based (Masto et al., 2008, <doi:10.1007/s10661-007-9697-z>), Principal Component Analysis-based (Andrews et al., 2004, <doi:10.2136/sssaj2004.1945>), Fuzzy Logic, Entropy Weighting (Shannon, 1948, <doi:10.1002/j.1538-7305.1948.tb01338.x>), and TOPSIS (Hwang and Yoon, 1981, <doi:10.1007/978-3-642-48318-9>). Implements four variable scoring functions: more-is-better, less-is-better, optimum-value, and trapezoidal, following Karlen and Stott (1994, <doi:10.2136/sssaspecpub35.c4>). Includes automated Minimum Data Set selection via Principal Component Analysis with Variance Inflation Factor filtering (Kaiser, 1960, <doi:10.1177/001316446002000116>), one-way ANOVA with Tukey HSD post-hoc tests, leave-one-out sensitivity analysis, and publication-quality visualization using 'ggplot2'.
How to cite:
Sadikul Islam (2026). SQIpro: Comprehensive Soil Quality Index Computation and Visualization. R package version 0.1.0, https://cran.r-project.org/web/packages/SQIpro. Accessed 12 Sep. 2026.
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