gaussian function

Normal and log-normal biphasic dose-response models

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

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)

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.

Details

Details yet to be provided.

Returns

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

Author(s)

Christian Ritz

Note

The functions are for use with the function drm.