update_tuning_mv: this function updates a block Gaussian random walk proposal...

In jtipton25/pgR: Bayesian Polya-Gamma Regression

this function updates a block Gaussian random walk proposal Metropolis-Hastings tuning parameters

Description

this function updates a block Gaussian random walk proposal Metropolis-Hastings tuning parameters

Usage

update_tuning_mv(k, accept, lambda, batch_samples, Sigma_tune, Sigma_tune_chol)

Arguments

k	is a positive integer that is the current MCMC iteration.
accept	is a positive number between 0 and 1 that represents the batch accpetance rate. The target of this adaptive tuning algorithm is an acceptance rate of between 0.44 (a univariate update) and 0.234 (5+ dimensional upate).
lambda	is a positive scalar that scales the covariance matrix Sigma_tune and diminishes towards 0 as k increases.
batch_samples	is a 50 x d dimensional matrix that consists of the 50 batch samples of the d-dimensional parameter being sampled.
Sigma_tune	is a d x d positive definite covariance matrix of the batch samples used to generate the multivariate Gaussian random walk proposal.
Sigma_tune_chol	is the d x d Cholesky decomposition of Sigma_tune.

jtipton25/pgR documentation built on July 8, 2022, 12:44 a.m.