DD_weight {Opt5PL}

One iteration to run Newton Raphson to get Ds-optimal weights

Description

This is a sub-part of running Newton Raphon method to search Ds-optimal weights for the given design points. This is function probvides the obtained Ds-optimal weights after one iteration of Newton Raphson method.

Usage

DD_weight(W, T, X, d, I4, I5, order)

Arguments

W

A numeric vector. The first K-1 weights for a given design

T

A numeric vector. Model parameter values

X

A numeric vector. K dose levels for a given design

d

Numeric. Step adjustment

I4

A numeric matrix. Information matrix for the 4PL model

I5

A numeric matrix. Information matrix for the 5PL model

order

Numeric. The number of model paraemters