Everything both npe() and nle() do before touching a density estimator

Get the simulations (running the simulator or taking pre-computed ones), coerce them to matrices, drop non-finite draws, and learn the two standardizers. Shared so the two entry points cannot drift apart – they differ only in which side of (theta, x) the estimator treats as its target.

Usage

prepare_simulations(
  prior,
  simulator,
  n_simulations,
  sim_args,
  theta,
  x,
  standardize,
  seed,
  verbose
)

Value

A list with the cleaned theta/x, their standardized versions, the two nsbi_standardizers, the column names, and n_dropped.