drc (version 0.8-2)

g3: The three-parameter Gompertz function

Description

'g3' provides the three-parameter Gompertz function, self starter function and names of the parameters.

Usage

g3(names = c("b", "d", "e"), useDer = FALSE)

Arguments

names

a vector of character strings giving the names of the parameters. The default is reasonable.

useDer

logical. If TRUE derivatives are supplied, otherwise they are not supplied. Not implemented!

Value

• See gompertz.

Details

The three-parameter Gompertz model is given by the expression $$f(x) = 0 + (d-0)\exp(-\exp(b(\log(x)-e))).$$ The function is asymmetric about the inflection point, that is the parameter $\exp(e)$.

See Also

Related functions are g4 and gompertz.

Examples

model1 <- multdrc(FA, fct=g3())
model1

rm(model1)