Improves the Interpretation of the Standardized Precipitation Index Under Changing Climate Conditions R package SPIChanges version 0.2.1 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. Software 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 Gabriel Constantino Blain <gabriel.blain@sp.gov.br> Comprehensive R Archive Network (CRAN) Gabriel Constantino Blain [aut, cre] (ORCID: <https://orcid.org/0000-0001-8832-7734>), Graciela R. Sobierajski [aut] (ORCID: <https://orcid.org/0000-0002-7211-9268>), Leticia L. Martins [aut] (ORCID: <https://orcid.org/0000-0002-0299-3005>), Adam H. Sparks [aut] (ORCID: <https://orcid.org/0000-0002-0061-8359>) MIT + file LICENSE (https://CRAN.R-project.org/package=SPIChanges/LICENSE) 2025-10-23 application/tgz https://CRAN.R-project.org/package=SPIChanges doi:10.32614/CRAN.package.SPIChanges en-US