Inverse of the loglogistic4 Model

Solves for x (requires x > 0): $$x = \frac{c}{\left(\frac{d - y}{y - a}\right)^{1/b}}$$

Usage

inv_loglogistic4(y, a, b, c, d)

inv_loglogistic4_fixed(y, fixed_a, b, c, d)

Arguments

y

Numeric vector. Observed response.

a, b, c, d

Numeric scalars. Model parameters.

fixed_a

Numeric scalar. Externally fixed lower asymptote.

Value

Numeric vector of x values.

See also

Other inverse-functions: inv_gompertz4(), inv_logistic4(), inv_logistic5(), inv_loglogistic5()