SPIChanges: Improves the Interpretation of the Standardized Precipitation Index Under Changing Climate Conditions

Improves the interpretation of the Standardized Precipitation Index under changing climate conditions. The package uses the nonstationary approach proposed in Blain et al. (2022) <doi:10.1002/joc.7550> to detect trends in rainfall quantities and to quantify the effect of such trends on the probability of a drought event occurring.

Version: 0.2.1
Depends: R (≥ 3.5)
Imports: gamlss, gamlss.dist, lubridate, MuMIn, rlang, spsUtil, stats, brglm2, zoo
Suggests: archive, curl, doParallel, dplyr, foreach, ggplot2, grid, knitr, ncdf4, patchwork, RColorBrewer, rmarkdown, roxyglobals, sf, purrr, testthat (≥ 3.0.0), tidyr
Published: 2025-10-23
DOI: 10.32614/CRAN.package.SPIChanges
Author: Gabriel Constantino Blain ORCID iD [aut, cre], Graciela R. Sobierajski ORCID iD [aut], Leticia L. Martins ORCID iD [aut], Adam H. Sparks ORCID iD [aut]
Maintainer: Gabriel Constantino Blain <gabriel.blain at sp.gov.br>
BugReports: https://github.com/gabrielblain/SPIChanges/issues
License: MIT + file LICENSE
URL: https://github.com/gabrielblain/SPIChanges
NeedsCompilation: no
Language: en-US
Materials: README, NEWS
CRAN checks: SPIChanges results

Documentation:

Reference manual: SPIChanges.html , SPIChanges.pdf
Vignettes: SPIChanges package: Monte Carlo Experiments and Case Studies (source, R code)
SPIChanges (source, R code)

Downloads:

Package source: SPIChanges_0.2.1.tar.gz
Windows binaries: r-devel: SPIChanges_0.2.1.zip, r-release: SPIChanges_0.2.1.zip, r-oldrel: SPIChanges_0.2.1.zip
macOS binaries: r-release (arm64): SPIChanges_0.2.1.tgz, r-oldrel (arm64): SPIChanges_0.2.1.tgz, r-release (x86_64): SPIChanges_0.2.1.tgz, r-oldrel (x86_64): SPIChanges_0.2.1.tgz
Old sources: SPIChanges archive

Linking:

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