Function functional_pdp 

pub fn functional_pdp(
    fit: &FregreLmResult,
    data: &FdMatrix,
    _scalar_covariates: Option<&FdMatrix>,
    component: usize,
    n_grid: usize,
) -> Option<FunctionalPdpResult>

Functional PDP/ICE for a linear functional regression model.

Varies the FPC score for component across a grid while keeping other scores fixed, producing ICE curves and their average (PDP).

For a linear model, ICE curves are parallel lines (same slope, different intercepts).

Arguments

• fit – A fitted FregreLmResult
• data – Original functional predictor matrix (n x m)
• scalar_covariates – Optional scalar covariates (n x p)
• component – Which FPC component to vary (0-indexed, must be < fit.ncomp)
• n_grid – Number of grid points (must be >= 2)