Struct BoostFosrResult 

#[non_exhaustive]
pub struct BoostFosrResult {
    pub intercept: Vec<f64>,
    pub beta: FdMatrix,
    pub fitted: FdMatrix,
    pub residuals: FdMatrix,
    pub r_squared_t: Vec<f64>,
    pub r_squared: f64,
    pub mstop: usize,
    pub nu: f64,
    pub selected_learners: Vec<usize>,
    pub gcv_path: Vec<f64>,
}

Result of component-wise boosted function-on-scalar regression (REG-06-01).

Follows the FosrResult field convention; adds the boosting path diagnostics (selected_learners, gcv_path, mstop, nu).

Divergence from FDboost: fixed mstop / fixed nu; no CV-based early stopping. GCV path is tracked for post-hoc diagnostics only (see gcv_path).

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) (pointwise mean of Y, length m_t).

beta: FdMatrix

Accumulated coefficient functions β_j(t) per predictor (p × m_t).

Row j holds the total contribution of base-learner j across all iterations where it was selected, scaled by ν.

fitted: FdMatrix

Fitted functional values F̂(xᵢ, t) = Σ contributions (n × m_t).

residuals: FdMatrix

Residual curves Y − F̂ (n × m_t).

r_squared_t: Vec<f64>

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

r_squared: f64

Integrated R² (scalar summary).

mstop: usize

Number of boosting iterations used.

nu: f64

Learning rate ν used.

selected_learners: Vec<usize>

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

gcv_path: Vec<f64>

‖residual‖_F² recorded after each iteration (length mstop).

Should be non-increasing for L2 loss (use for path diagnostics / GCV).

Trait Implementations

impl Clone for BoostFosrResult

fn clone(&self) -> BoostFosrResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BoostFosrResult

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

Formats the value using the given formatter.

impl PartialEq for BoostFosrResult

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BoostFosrResult