Exploration and Graphics for RivEr Trends Confidence Intervals R package EGRETci version 2.0.5 CRAN Task View: Hydrology (https://CRAN.R-project.org/view=Hydrology) Collection of functions to evaluate uncertainty of results from water quality analysis using the Weighted Regressions on Time Discharge and Season (WRTDS) method. This package is an add-on to the EGRET package that performs the WRTDS analysis. The WRTDS modeling method was initially introduced and discussed in Hirsch et al. (2010) <doi:10.1111/j.1752-1688.2010.00482.x>, and expanded in Hirsch and De Cicco (2015) <doi:10.3133/tm4A10>. The paper describing the uncertainty and confidence interval calculations is Hirsch et al. (2015) <doi:10.1016/j.envsoft.2015.07.017>. Software Depends: R (>= 3.5.0) Imports: EGRET(>= 3.0.5), binom, stats, graphics, utils, foreach Suggests: knitr, testthat, doParallel, iterators, rmarkdown, pkgdown, covr Laura DeCicco <ldecicco@usgs.gov> Comprehensive R Archive Network (CRAN) Laura DeCicco [aut, cre] (ORCID: <https://orcid.org/0000-0002-3915-9487>), Robert Hirsch [aut] (ORCID: <https://orcid.org/0000-0002-4534-075X>), Stacey Archfield [ctb] (ORCID: <https://orcid.org/0000-0002-9011-3871>), Jennifer Murphy [ctb] (ORCID: <https://orcid.org/0000-0002-0881-0919>) CC0 2025-04-17 application/tgz https://CRAN.R-project.org/package=EGRETci doi:10.32614/CRAN.package.EGRETci