calculate_efficiency {spdesign}

Calculate efficiency

Description

The function is called inside evaluate_design_candidate

Usage

calculate_efficiency(
  prior_values,
  design_env,
  model,
  dudx,
  return_all = FALSE,
  significance = 1.96
)

Arguments

prior_values

a list or vector of assumed priors

design_env

A design environment in which to evaluate the the function to derive the variance-covariance matrix.

model

A character string indicating the model to optimize the design for. Currently the only model programmed is the 'mnl' model and this is also set as the default.

dudx

A character string giving the name of the prior in the denominator. Must be specified when optimizing for 'c-error'

return_all

If 'TRUE' return a K or K-1 vector with parameter specific error measures. Default is 'FALSE'.

significance

A t-value corresponding to the desired level of significance. The default is significance at the 5 t-value of 1.96.

Value

A list with a named vector of efficiency criteria and the variance-covariance matrix