Compare spatial subspaces across retained folds

Compare spatial subspaces across retained folds

Usage

component_stability(object)

Arguments

object

A global result retaining at least two fits.

Value

One row per fold pair, with effective ranks, number of common retained features, principal angles in radians (a list column), and overlap = sum(cos(angles)^2) / max(rank1, rank2). The normalization penalizes unequal ranks. Empty subspaces have undefined (NA) overlap.

Details

Comparison uses original feature units on the intersection of columns retained by both folds. It is invariant to orthogonal component rotations. It measures spatial subspaces, not matched components or statistical evidence for a supported rank.