Struct ScatterSpec 

pub struct ScatterSpec {
    pub rows: usize,
    pub cols: usize,
    pub sub: Symbol,
    pub sigma: Symbol,
    pub operands: Vec<(Symbol, Axis)>,
    pub term: ZipTerm,
}

A recognized scatter-matrix accumulation S = Σ_{r<R} d_r d_rᵀ (C × C, row-major, from zero): each row’s vector d_r[c] = term computed into a scratch array by an elementwise loop over the row, then added to S as a rank-1 update of itself — the covariance step of Gaussian discriminant analysis.

Fields

rows: usize

cols: usize

sub: Symbol

The scratch row and the accumulated matrix.

sigma: Symbol

operands: Vec<(Symbol, Axis)>

The arrays the row term reads, in reading order, each with its axis; ZipTerm::Read(k) is operands[k] at that axis.

term: ZipTerm

The row term, a select’s common operand hoisted out of its arms (hoist_common_operand).

Trait Implementations

impl Clone for ScatterSpec

fn clone(&self) -> ScatterSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScatterSpec

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

Formats the value using the given formatter.

impl PartialEq for ScatterSpec

fn eq(&self, other: &ScatterSpec) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ScatterSpec

impl StructuralPartialEq for ScatterSpec