drc (version 4.0-0)

gaussian: Normal and log-normal biphasic dose-response models

Description

Model functions for fitting symmetric or skewed bell-shaped/biphasic dose-response patterns.

Usage

gaussian(fixed = c(NA, NA, NA, NA, NA), names = c("b", "c", "d", "e", "f"), 
    method = c("1", "2", "3", "4"), ssfct = NULL, fctName, fctText, loge = FALSE)
    
    lgaussian(fixed = c(NA, NA, NA, NA, NA), names = c("b", "c", 
    "d", "e", "f"), method = c("1", "2", "3", "4"), ssfct = NULL, 
    fctName, fctText, loge = FALSE)

Value

The value returned is a list containing the nonlinear function, the self starter function and the parameter names.

Arguments

fixed

numeric vector. Specifies which parameters are fixed and at what value they are fixed. NAs for parameter that are not fixed.

names

a vector of character strings giving the names of the parameters (should not contain ":"). The default is reasonable (see under 'Usage'). The order of the parameters is: b, c, d, e, f (see under 'Details').

method

character string indicating the self starter function to use.

ssfct

a self starter function to be used.

fctName

optional character string used internally by convenience functions.

fctText

optional character string used internally by convenience functions.

loge

logical indicating whether or not e or log(e) should be a parameter in the model. By default e is a model parameter.

Author

Christian Ritz

Details

Details yet to be provided.