hamilton | R Documentation |
These are the example dose-response curves given in Hamilton (1977). Note that, as per Hamilton (1978), the confidence intervals given in Hamilton (1977) for these data sets are incorrect.
data(hamilton)
A list containing ten data frames: dr1a, dr1b, dr1c, dr1d, dr1e, dr4a, dr4b, dr4c, dr4d, dr4e,
Hamilton, 1977.
Hamilton, M. A.; Russo, R. C.; Thurston, R. V. Trimmed Spearman-Karber Method for Estimating Median Lethal Concentrations in Toxicity Bioassays. Enviro. Sci. Tech. 1977, 11 (7), 714-719. http://dx.doi.org/10.1021/es60130a004
Ibid, 1978, 12 (4), 417. http://dx.doi.org/10.1021/es60140a017
#Create data set of mean and confidence intervals for comparison to
#the results from the EPA's program
data(hamilton)
p <- 2*pnorm(2)-1
for(input in hamilton){
input$p<-input$r/input$n
res0<-tsk(input,trim=0,conf.level=p)
res5<-tsk(input,trim=0.05,conf.level=p)
res10<-tsk(input,trim=0.1,conf.level=p)
res20<-tsk(input,trim=0.2,conf.level=p)
print(c(res0$LD50,res5$LD50,res10$LD50,res20$LD50))
print(c(res0$conf.int[1],res5$conf.int[1],
res10$conf.int[1],res20$conf.int[1]))
print(c(res0$conf.int[2],res5$conf.int[2],
res10$conf.int[2],res20$conf.int[2]))
print("-")
}
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