halfnorm.start.limits: halfnorm.start.limits - Start and limit values for halfnorm...

In tmcd82070/Rdistance: Density and Abundance from Distance-Sampling Surveys

halfnorm.start.limits - Start and limit values for halfnorm distance function

Description

Compute starting values and limits for the half normal distance function.

Usage

halfnorm.start.limits(ml)

Arguments

ml

Either a Rdistance 'model frame' or an Rdistance 'fitted object'. Both are of class "dfunc". Rdistance 'model frames' are lists containing components necessary to estimate a distance function, but no estimates. Rdistance 'model frames' are typically produced by calls to parseModel. Rdistance 'fitted objects' are typically produced by calls to dfuncEstim. 'Fitted objects' are 'model frames' with additional components such as the parameters estimates, log likelihood value, convergence information, and the variance- covariance matrix of the parameters.

Value

A list containing the following components

start	Vector of starting values for parameters of the likelihood and expansion terms.
lowlimit	Vector of lower limits for the likelihood parameters and expansion terms.
uplimit	Vector of upper limits for the likelihood parameters and expansion terms.
names	Vector of names for the likelihood parameters and expansion terms.

The length of each vector in the return is: (Num expansions) + 1 + 1*(like %in% c("hazrate")) + (Num Covars).

tmcd82070/Rdistance documentation built on April 13, 2025, 1:38 p.m.