Two-parameter Michaelis-Menten function

A two-parameter Michaelis-Menten function where b is fixed at -1, c at 0, and f at 1. Commonly used for enzyme kinetics and weed density studies.

Usage

MM.2(fixed = c(NA, NA), names = c("d", "e"), ...)

Arguments

fixed

numeric vector of length 2, specifying fixed parameters (use NA for non-fixed parameters).

names

character vector of length 2, specifying the names of the parameters (default: d, e).

...

additional arguments to llogistic.

Value

See llogistic.

Details

The two-parameter Michaelis-Menten function is $$f(x) = \frac{d \cdot x}{e + x}$$ which is equivalent to \(d/(1+(e/x))\).

See also

MM.3, AR.2, AR.3

Author

Christian Ritz

Examples

met.mm.m1 <- drm(gain~dose, product, data = methionine, fct = MM.2())
#> Control measurements detected for level: control