Struct CpDecomposition 

pub struct CpDecomposition {
    pub weights: Vec<f64>,
    pub factors: Vec<Matrix>,
}

CP (CANDECOMP/PARAFAC) decomposition result.

Represents a tensor as a weighted sum of rank-one tensors: X ≈ Σ_r λ_r · a_r^(1) ◦ a_r^(2) ◦ ... ◦ a_r^(N)

Fields

weights: Vec<f64>

Weights (lambda) for each rank-one component.

factors: Vec<Matrix>

Factor matrices, one per mode. Factor[n] is I_n × R.

Implementations

impl CpDecomposition

pub fn rank(&self) -> usize

Returns the rank of the decomposition.

pub fn reconstruct(&self) -> SolverResult<Tensor>

Reconstructs the full tensor from the CP factors.

pub fn fit_error(&self, original: &Tensor) -> SolverResult<f64>

Computes the relative fit error: ||X - X_hat|| / ||X||.

Trait Implementations

impl Clone for CpDecomposition

fn clone(&self) -> CpDecomposition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CpDecomposition

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

Formats the value using the given formatter.