Compress the posterior of an sccomp fit

Source: R/compress_posterior.R

Convenience wrapper around compress_posterior() for sccomp fits. sccomp stores the underlying cmdstanr fit in attr(x, "fit") rather than x$fit.

compress_sccomp(
  sccomp_obj,
  method = c("mclust", "mvdens_gmm", "mvdens_kde"),
  variables = NULL,
  n_components = 3L,
  model_name = NULL,
  verbose = FALSE,
  remove_csvs = FALSE,
  ...
)

Arguments

sccomp_obj

An sccomp fit object (with attr(x, "fit") a CmdStanMCMC).

method

One of 'mclust', 'mvdens_gmm', 'mvdens_kde'. See compression_methods().

variables

Optional character vector of parameter names to keep. If NULL (default) all columns are used.

n_components

Integer number of mixture components (used by "mclust" and "mvdens_gmm"). Default 3.

model_name

mclust covariance structure (e.g. "VVV", "EEE", or a vector of allowed model names). Ignored by other methods. When NULL (default) poco auto-selects a sensible set: the spherical and diagonal models c("EII", "VII", "EEI", "EVI", "VEI", "VVI") are used when nrow(draws) <= ncol(draws) so covariances remain identifiable, otherwise mclust's full default set is used and BIC picks the best.

verbose

Logical; print backend progress. Default FALSE.

remove_csvs

Logical; if TRUE, delete the cmdstan CSV files after compression. Default FALSE.

...

Additional arguments forwarded to the backend (e.g. mclust::Mclust()).

Value

A list with compressed and structure (the sccomp object with attr(x, "fit") cleared). Use reconstruct_sccomp() to rebuild.