Compute Shared Fraction Per Omics Block — get_shared

Shared fraction is computed by the signal-based definition: 1 - (||R||_F^2 / ||X||_F^2), where R = X - X_pred.

Usage

get_shared_frac(
  dat.list = NULL,
  residual = NULL,
  shared_specific = NULL,
  eps = 1e-12
)

Arguments

dat.list: Optional named list of original omics matrices (X).
residual: Optional named list of residual matrices (R).
shared_specific: Optional output from get_shared_specific_weights(). If provided, residual and (when needed) reconstructed dat.list are extracted from it.
eps: Small positive threshold to avoid division by zero.

Value

A data.frame with one row per omics block: data, frob_shared, frob_specific, specific_ratio, shared_frac, and method. frob_shared is the Frobenius norm of the reconstructed (shared) matrix X_pred = X - R. For backward compatibility, it also includes frob_data, frob_residual, and residual_ratio.