| derive_vcov {spdesign} | R Documentation |
Derive the variance covariance matrix of the design
Description
The function is a wrapper around derive_vcov_mnl and
derive_vcov_rpl and calculates the variance-covariance matrix
of the specified model and design given the priors.
Usage
derive_vcov(design_env, model)
Arguments
design_env |
An environment containing all the elements necessary to derive the variance-covariance matrix |
model |
A string indicating the model for which you wish to derive the variance covariance matrix. Can be either "mnl" or "rpl" |
Value
The variance covariance matrix. If the Fisher information matrix is singular, then return NULL
[Package spdesign version 0.0.3 Index]