An automated approach to Litchfield and Wilcoxon’s evaluation of dose-effect experiments using the R package LW1949

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Authors Jean V. Adams, Karen S. Slaght, Michael A. Boogaard
Journal/Conference Name Environmental toxicology and chemistry
Paper Category
Paper Abstract The authors developed a package, LW1949, for use with the statistical software R to automatically carry out the manual steps of Litchfield and Wilcoxon's method of evaluating dose-effect experiments. The LW1949 package consistently finds the best fitting dose-effect relation by minimizing the chi-squared statistic of the observed and expected number of affected individuals and substantially speeds up the line-fitting process and other calculations that Litchfield and Wilcoxon originally carried out by hand. Environ Toxicol Chem 2016;35:3058-3061. Published 2016 Wiley Periodicals Inc. on behalf of SETAC. This article is a US Government work and, as such, is in the public domain in the United States of America.
Date of publication 2016
Code Programming Language R

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