mcmc_rhat: Create Rhat plot
In rpruim/rjpBayes: Utilities for Working with Bayesian Models

mcmc_rhat() is a generic. The default method simply calls bayesplot::mcmc_rhat(). An additional method is provided for brmsfit objects so we can avoid first extracting the R-hat values before creating the plot.

mcmc_rhat(object, ..., size = NULL)

## Default S3 method:
mcmc_rhat(object, ..., size = NULL)

## S3 method for class 'brmsfit'
mcmc_rhat(object, pars = NULL, ..., size = NULL)

`object`	A model fitted with `[brms::brm()`].
`...`	Arguments passed to individual methods.
`pars`	An optional character vector of parameter names. For `nuts_params` these will be NUTS sampler parameter names rather than model parameters. If pars is omitted all parameters are included.