VFP (version 1.0)

t.coef: Transformation of Coefficients.

Description

This function performs transformation from the original parameterization into the 'VFP'-package internal re-parameterized form.

Usage

# S3 method for coef
t(coeffs0, K = NULL, Maxi = NULL, model = NULL,
  signJ = NULL, eps = sqrt(.Machine$double.eps), ...)

Arguments

coeffs0

(numeric) vector of function coefficients to be transformed into the re-parameterized form

K

(numeric) constant value 'K'

Maxi

(numeric) max. value

model

(integer) specifying which model shall be back-transformed

signJ

(integer) either 1 or -1

eps

(numeric) constant used instead of zero in case of log-transformation

...

additional parameters

Value

(numeric) vector of coefficients in re-parameterized form

Details

In the 'VFP' package models are re-parameterized to have better control over the constrained solution-space, i.e. only models may be fitted generating non-negative fitted values. This function is intended to be for internal use only.