Four parameter log-logistic (with explicit inflection point)

To be used by FourPLfit.

Usage

FourPLL1(x, a, bta, c, y0)

FourPLL1_fixa(x, a = 100, bta, c, y0)

FourPLL1_fixy0(x, a, bta, c)

FourPLL1_fixa_fixy0(x, a = 100, bta, c)

FourPLL1_deriv(x, y0, a, b, c)

Arguments

x

The explanatory/independent variable value.

a

Parameter \(a\).

bta

Parameter \(\beta\) where \(b = e^{\beta}\).

c

Parameter \(c\).

y0

Parameter \(y_{0}\).

b

Parameter \(b\).

Value

The calculated response/dependent value value.