Initialize and tick through the progress bar

prep_pbar creates and update_pbar steps through the progress bars (if desired) in TS

prep_pbar(control = list(), bar_type = "rho", nr = NULL)

update_pbar(pbar, control = list())

Arguments

control	A `list` of parameters to control the fitting of the Time Series model including the parallel tempering Markov Chain Monte Carlo (ptMCMC) controls. Values not input assume defaults set by `TS_control`. Of use here is `quiet` which is a a `logical` indicator of whether there should be information (i.e. the progress bar) printed during the run or not. Default is `TRUE`.
bar_type	"rho" (for change point locations) or "eta" (for regressors).
nr	`integer` number of unique realizations, needed when `bar_type` = "eta".
pbar	The progress bar object returned from `prep_pbar`.

prep_pbar: the initialized progress bar object.

update_pbar: the ticked-forward pbar.

  pb <- prep_pbar(control = list(nit = 2)); pb
  pb <- update_pbar(pb); pb
  pb <- update_pbar(pb); pb