Five-parameter Brain-Cousens hormesis model

BC.5 provides the full five-parameter Brain-Cousens modified log-logistic model for describing hormesis.

Usage

BC.5(fixed = c(NA, NA, NA, NA, NA), names = c("b", "c", "d", "e", "f"), ...)

Arguments

fixed

numeric vector of length 5 specifying fixed parameters (NAs for free parameters).

names

a vector of character strings giving the names of the parameters.

...

additional arguments passed to braincousens.

Value

A list (see braincousens).

See also

braincousens, BC.4

Author

Christian Ritz

Examples

lettuce.bcm1 <- drm(weight ~ conc, data = lettuce, fct = BC.5())
modelFit(lettuce.bcm1)
#> Lack-of-fit test
#> 
#>           ModelDf      RSS Df F value p value
#> ANOVA           7 0.088237                   
#> DRC model       9 0.118842  2  1.2140  0.3527
plot(lettuce.bcm1)