choiceDes (version 0.9-1)

dcm.design.effcy: INTERNAL: Calculate design efficiencies

Description

Internal function to calculate mathematical efficiencies of designs.

Usage

dcm.design.effcy(des)

Arguments

des

An effects-coded design to be evaluated.

Value

D

Overall D-efficiency: det(M)^(-1/k), where det(M) is the determinant of the dispersion matrix X'X, and k is the number of parameters.

V

Variance-covariance matrix derived from M.

s

Parameter standard deviations: sqrt(diag(V)).

Details

This function calculates overall D-efficiency, the variance-covariance matrix, and standard deviations for each parameter from an effects coded design.

Called internally by dcm.design and dcm.design.cand.

See Also

dcm.design, dcm.design.cand

Examples

# NOT RUN {
des <- dcm.design(c(3,3,4,3), 10, 8, 3)$effects$design
eff <- dcm.design.effcy(des)
# }