smallds1 {Opt5PL}

Sensitivity function of D-optimality criterion

Description

This evaluates the sensitivity function of the D-optimality criterion at the given value of x for a specified model.

Usage

smallds1(T, x, inv, order)

Arguments

T

A numeric vector. Model parameter values

x

A numeric. A given dose level

inv

A numeric matrix. Inverse information matrix

order

numeric. The number of model paraemters: 3, 4, 5 for the 3, 4, 5PL models respectively