Struct ScaledBasis 

pub struct ScaledBasis<const N: usize, B> {
    pub inner: B,
    pub scales: Vec<f64>,
    pub center: [f64; N],
}

Wrapper for any basis that applies coordinate-wise scaling before evaluation.

$V(x) \approx \sum w_i \phi_i(S x)$ where $S$ is a diagonal scaling matrix. Used to map problem domains (e.g. $[0, 100]$) to basis domains (e.g. $[-2, 2]$).

Fields

inner: B

scales: Vec<f64>

center: [f64; N]

Implementations

impl<const N: usize, B> ScaledBasis<N, B>

pub fn new(inner: B, scales: Vec<f64>) -> Self

pub fn with_center(self, center: [f64; N]) -> Self

Trait Implementations

impl<const N: usize, B: Basis<N>> Basis<N> for ScaledBasis<N, B>

fn num_features(&self) -> usize

Returns the number of basis functions (K).

fn evaluate(&self, state: &[f64; N], buffer: &mut [f64])

Evaluates all basis functions at state and writes them into buffer. buffer must have length at least num_features().

fn evaluate_buffers(&self, state: &[f64; N], buffer: &mut Vec<f64>)

Evaluates all basis functions and appends them to the provided vector. This avoids zero-initialization overhead.

fn eval_dot(&self, state: &[f64; N], weights: &[f64]) -> f64

Returns the dot product $w \cdot \Phi(x)$ without allocating the full feature vector. Default implementation allocates, overrides can be optimization.

impl<const N: usize, B: Clone> Clone for ScaledBasis<N, B>

fn clone(&self) -> ScaledBasis<N, B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const N: usize, B: Debug> Debug for ScaledBasis<N, B>

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

Formats the value using the given formatter.