Defficiency: D Efficiency

In arappold/docopulae: Optimal Designs for Copula Models

Description

Defficiency computes the D-, D_s or D_A-efficiency measure for a design with respect to a reference design.

Usage

Defficiency(des, ref, mod, A = NULL, parNames = NULL)

Arguments

des	a design.
ref	a design, the reference.
mod	a model.
A	for D-efficiency: NULL D_s-efficiency: a vector of names or indices, the subset of parameters of interest. D_A-efficiency: either directly: a matrix without row names. indirectly: a matrix with row names corresponding to the parameters.
parNames	a vector of names or indices, the subset of parameters to use. Defaults to the parameters for which the Fisher information is available.

Details

Indices supplied to argument A correspond to the subset of parameters defined by argument parNames.

D efficiency is defined as

( det(M(ξ, θ)) / det(M(ξ*, θ)) )**(1/n)

and D_A efficiency as

( det(t(A) %*% solve(M(ξ*, θ)) %*% A) / det(t(A) %*% solve(M(ξ, θ)) %*% A) )**(1/s)

Value

Defficiency returns a single numeric.

See Also

design, param, wDefficiency

Examples

## see examples for param

arappold/docopulae documentation built on May 10, 2019, 12:47 p.m.