ssdtools: Species Sensitivity Distributions

Species sensitivity distributions are cumulative probability distributions which are fitted to toxicity concentrations for different species as described by Posthuma et al.(2001) <isbn:9781566705783>. The ssdtools package uses Maximum Likelihood to fit distributions such as the log-normal, gamma, log-logistic, log-Gumbel, Gompertz and Weibull. The user can provide custom distributions. Multiple distributions can be averaged using Information Criteria. Confidence intervals on hazard concentrations and proportions are produced by parametric bootstrapping.

Version: 0.3.7
Depends: R (≥ 4.1)
Imports: chk, fitdistrplus, abind, actuar, ggplot2, graphics, grid, lifecycle, tibble, utils, scales, stats, VGAM, Rcpp
LinkingTo: Rcpp
Suggests: covr, knitr, rmarkdown, testthat, readr, rlang, purrr, tidyr, dplyr, R.rsp,, reshape2
Published: 2021-10-27
Author: Joe Thorley ORCID iD [aut, cre, ctr], Carl Schwarz [aut, ctr], Angeline Tillmanns [ctb], Ali Azizishirazi [ctb], Rebecca Fisher [ctb], David Fox [ctb], Kathleen McTavish [ctb], Heather Thompson [ctb], Andy Teucher [ctb], Emilie Doussantousse [ctb], Stephanie Hazlitt [ctb], Nadine Hussein [ctb], Nan-Hung Hsieh [ctb], Sergio Ibarra Espinosa [ctb], Province of British Columbia [cph]
Maintainer: Joe Thorley <joe at>
License: Apache License (== 2.0) | file LICENSE
NeedsCompilation: yes
Language: en-US
Citation: ssdtools citation info
Materials: README NEWS
CRAN checks: ssdtools results


Reference manual: ssdtools.pdf
Vignettes: Selecting Distributions
Embellishing Plots with an Exposure Distribution
Frequently Asked Questions
Small sample bias in estimates - reference
Get Started with ssdtools
Small sample bias in estimates


Package source: ssdtools_0.3.7.tar.gz
Windows binaries: r-devel:, r-devel-UCRT:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): ssdtools_0.3.7.tgz, r-release (x86_64): ssdtools_0.3.7.tgz, r-oldrel: ssdtools_0.3.4.tgz
Old sources: ssdtools archive

Reverse dependencies:

Reverse imports: GenHMM1d


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