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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 gamma, log-logistic, log-normal and log-normal log-normal mixture. Multiple distributions can be averaged using Akaike Information Criteria. Confidence intervals on hazard concentrations and proportions are produced by bootstrapping.

Versions across snapshots

VersionRepositoryFileSize
2.6.0 rolling source/ R- ssdtools_2.6.0.tar.gz 1.8 MiB
2.6.0 rolling linux/jammy R-4.5 ssdtools_2.6.0.tar.gz 1.8 MiB
2.6.0 latest source/ R- ssdtools_2.6.0.tar.gz 1.8 MiB
2.6.0 latest linux/jammy R-4.5 ssdtools_2.6.0.tar.gz 1.8 MiB
2.6.0 2026-04-23 source/ R- ssdtools_2.6.0.tar.gz 1.8 MiB
2.6.0 2026-04-09 windows/windows R-4.5 ssdtools_2.6.0.zip 2.4 MiB
2.3.0 2025-04-20 source/ R- ssdtools_2.3.0.tar.gz 1.5 MiB

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