Struct InnerSphere 

pub struct InnerSphere {
    pub projection: InnerProjection,
    pub inner_positions: Vec<SphericalPoint>,
    pub member_indices: Vec<usize>,
    pub explained_variance_ratio: f64,
    pub global_subset_evr: f64,
    pub evr_improvement: f64,
}

A category-specific inner sphere with its own optimized projection.

Only created for categories that meet all of:

1. At least MIN_INNER_SPHERE_SIZE members
2. Inner EVR improves over global subset EVR by ≥ MIN_EVR_IMPROVEMENT

The inner sphere gives higher-resolution angular discrimination within the category than the global outer projection can provide.

Fields

projection: InnerProjection

The category-specific projection (linear PCA or kernel PCA).

inner_positions: Vec<SphericalPoint>

Positions of member items in the inner sphere’s coordinate system. inner_positions[i] corresponds to member_indices[i].

member_indices: Vec<usize>

Global item indices of the members (same order as inner_positions).

explained_variance_ratio: f64

Explained variance ratio of the inner projection.

global_subset_evr: f64

Mean certainty of these items under the global (outer) projection. Baseline for measuring improvement.

evr_improvement: f64

explained_variance_ratio - global_subset_evr.

Trait Implementations

impl Clone for InnerSphere

fn clone(&self) -> InnerSphere

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InnerSphere

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.