Struct BoostFofrResult 

#[non_exhaustive]
pub struct BoostFofrResult {
    pub intercept: Vec<f64>,
    pub fitted: FdMatrix,
    pub residuals: FdMatrix,
    pub r_squared_t: Vec<f64>,
    pub r_squared: f64,
    pub fpca_x: Vec<FpcaResult>,
    pub score_coefs: Vec<FdMatrix>,
    pub beta_surfaces: Vec<FdMatrix>,
    pub selected_learners: Vec<usize>,
    pub gcv_path: Vec<f64>,
    pub mstop: usize,
    pub nu: f64,
}

Result of component-wise boosted function-on-function regression (REG-06-02).

Functional predictors are compressed via FPCA score projection; the boosting core operates on the resulting scalar design matrices (bfpc variant).

Divergence from FDboost: uses FPC score compression (fdata_to_pc_1d) rather than FDboost’s bsignal B-spline joint expansion. Simpler and dependency-free.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

intercept: Vec<f64>

Intercept function F₀(t) = Ȳ(t) (length m_y).

fitted: FdMatrix

Fitted response curves (n × m_y).

residuals: FdMatrix

Residual curves (n × m_y).

r_squared_t: Vec<f64>

Pointwise R²(t) at each response grid point (length m_y).

r_squared: f64

Overall R².

fpca_x: Vec<FpcaResult>

FPCA result for each functional predictor (one per predictor).

score_coefs: Vec<FdMatrix>

Accumulated FPC-space score coefficients per predictor (Vec[j] is K_j × m_y).

beta_surfaces: Vec<FdMatrix>

Reconstructed coefficient surfaces β_j(s,t) per predictor (Vec[j] is m_x × m_y).

selected_learners: Vec<usize>

Index j* of the base-learner selected at each boosting iteration (length mstop).

gcv_path: Vec<f64>

‖residual‖_F² per boosting iteration (length mstop).

mstop: usize

Number of boosting iterations used.

nu: f64

Learning rate ν used.

Trait Implementations

impl Clone for BoostFofrResult

fn clone(&self) -> BoostFofrResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BoostFofrResult

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

Formats the value using the given formatter.

impl PartialEq for BoostFofrResult

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BoostFofrResult