calculate_d_error {spdesign}

D-error

Description

Computes the D-error of the design, which is equal to the K-root of the determinant of the variance-covariance matrix.

Usage

calculate_d_error(design_vcov)

Arguments

design_vcov

A variance-covariance matrix returned by derive_vcov or returned by an estimation routine. The matrix should be symmetrical and K-by-K

Value

A single number