Salmonella Reverse Mutagenicity Assay
Data on Ames Salmonella reverse mutagenicity assay.
data("salmonellaTA98")This data frame contains the following columns:
Dose levels of quinoline.
Numbers of revertant colonies of TA98 Salmonella observed on each of three replicate plates tested at each of six dose levels of quinoline diameter.
This data set is taken from package dispmod provided by Luca Scrucca.
Margolin, B.J., Kaplan, N. and Zeiger, E. Statistical analysis of the Ames Salmonella/microsome test, Proc. Natl. Acad. Sci. USA, 76, 3779–3783, 1981.
Breslow, N.E. Extra-Poisson variation in log-linear models, Applied Statistics, 33, 38–44, 1984.
Wang, P., Puterman, M.L., Cockburn, I.M., and Le, N.D. Mixed Poisson regression models with covariate dependent rates, Biometrics, 52, 381–400, 1996.
data("salmonellaTA98", package = "flexmix")
salmonMix <- initFlexmix(y ~ 1,
data = salmonellaTA98,
model = FLXMRglmfix(family = "poisson",
fixed = ~ x + log(x + 10)),
k = 2, nrep = 5)
salmonMix.pr <- predict(salmonMix, newdata = salmonellaTA98)
plot(y ~ x, data = salmonellaTA98,
pch = as.character(clusters(salmonMix)),
ylim = range(c(salmonellaTA98$y, unlist(salmonMix.pr))))
for (i in 1:2) lines(salmonellaTA98$x, salmonMix.pr[[i]], lty = i)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.