calculate_d_error: 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