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Fast ICA via Rust from processed data

fast_ica_rust_helper.Rd

This functions is a wrapper over the Rust implementation of fastICA expected already the pre-processed matrix and the pre-whitening matrix. It has the same two options c("logcosh", "exp") to run ICA in parallel modus. You can control the parameters of ICA via ica_params.

Usage

fast_ica_rust_helper(
  X,
  K,
  n_icas,
  ica_fun = c("logcosh", "exp"),
  seed = NULL,
  ica_params = params_ica_general()
)

Arguments

X

Numeric matrix. Processed data. Output of rs_prepare_whitening().

K

The K matrix. Pre-whitening matrix. Output of rs_prepare_whitening().

n_icas

Integer. Number of independent components to recover.

ica_fun

String, element of c("logcosh", "exp").

seed

Integer. Seed to ensure reproducible results.

ica_params

List. The ICA parameters, see params_ica_general() wrapper function. This function generates a list containing:

  • maxit - Integer. Maximum number of iterations for ICA.

  • alpha - Float. The alpha parameter for the logcosh version of ICA. Should be between 1 to 2.

  • max_tol - Maximum tolerance of the algorithm.

  • verbose - Controls verbosity of the function.

Value

A list containing:

  • w The mixing matrix w.

  • A ICA results matrix A.

  • S ICA results matrix S.

  • converged Boolean indicating if algorithm converged.