Convert double Richards parameters to natural scale

This numeric reporting helper returns the transformed parameter values and Maunder's alpha1, beta1, alpha2, and beta2. Under the 50%-point parameterization, alpha2 can be non-positive when the shape parameters differ.

Usage

double_richards_natural(len, par)

Arguments

len

Numeric vector of length-bin midpoints.

par

Numeric vector of length 6 containing selectivity parameters.

Value

Named numeric vector of natural-scale parameters.