View source: R/rstan_generics.R

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.

1 | ```
derive_chain(ll_matrix = NULL)
``` |

`ll_matrix` |
A log-likelihood matrix as produced by the |

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