Helper Function for ‘loo’ calculation

Description

This function accepts a log-likelihood matrix produced by ‘id_post_pred’ and extracts the IDs of the MCMC chains. It is necessary to use this function as the second argument to the ‘loo’ function along with an exponentiated log-likelihood matrix. See the package vignette How to Evaluate Models for more details.

Usage

derive_chain(ll_matrix = NULL)

Arguments

ll_matrix

A log-likelihood matrix as produced by the id_post_pred function