Bayesplot, facet labels, labeller, and label_parsed

General
6

I have one more query @jonah (sorry!) - I can’t quite get this working with mcmc_rank_overlay:

library(bayesplot)
library(dplyr)
library(ggplot2)

draws <- example_mcmc_draws()
my_labeller <- as_labeller(
  x = c(
    'alpha' = 'alpha',
    'sigma' = 'epsilon',
    'beta[1]' = 'gamma[0]', # intentional change
    'beta[2]' = 'gamma[2]'
  ), 
  default = label_parsed
)

# works as expected
mcmc_combo(
  x = draws, 
  combo = c("dens", "trace"),
  facet_args = list(
    ncol = 1,
    labeller = my_labeller
  )
)


# does not
mcmc_combo(
  x = draws, 
  combo = c("rank_overlay", "trace"),
  facet_args = list(
    ncol = 1,
    labeller = my_labeller
  )
)

Created on 2020-05-19 by the reprex package (v0.3.0)