smallds1 function

Sensitivity function of D-optimality criterion

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

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