Struct SplineBasisFunctions 

pub struct SplineBasisFunctions { /* private fields */ }

Spline Basis Functions Generator

Generate spline basis functions for non-linear feature transformation. Supports B-splines and Natural Cubic Splines for smooth curve fitting and feature engineering applications.

Parameters

• n_splines - Number of spline basis functions to generate
• degree - Degree of the spline (1 for linear, 2 for quadratic, 3 for cubic)
• spline_type - Type of spline (B-spline or Natural Cubic)
• knots - Knot positions (if None, uniformly distributed knots are used)
• extrapolation - How to handle values outside the knot range

Examples

use sklears_feature_extraction::basic_features::{SplineBasisFunctions, SplineType};
use scirs2_core::ndarray::array;

let X = array![[0.0], [0.25], [0.5], [0.75], [1.0]];
let spline = SplineBasisFunctions::new()
    .n_splines(5)
    .degree(3)
    .spline_type(SplineType::BSpline);

let features = spline.transform(&X.view()).expect("valid input produces transform output");

Implementations

impl SplineBasisFunctions

pub fn new() -> Self

Create a new SplineBasisFunctions transformer

pub fn n_splines(self, n_splines: usize) -> Self

Set the number of spline basis functions

pub fn degree(self, degree: usize) -> Self

Set the degree of the splines

pub fn spline_type(self, spline_type: SplineType) -> Self

Set the type of spline

pub fn knots(self, knots: Vec<Float>) -> Self

Set custom knot positions

pub fn extrapolation(self, extrapolation: ExtrapolationMode) -> Self

Set extrapolation mode

pub fn transform(&self, X: &ArrayView2<'_, Float>) -> SklResult<Array2<Float>>

Transform input data using spline basis functions

Trait Implementations

impl Clone for SplineBasisFunctions

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SplineBasisFunctions

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

Formats the value using the given formatter.

impl Default for SplineBasisFunctions

fn default() -> Self

Returns the “default value” for a type.

impl Transform<ArrayBase<ViewRepr<&f64>, Dim<[usize; 2]>>, ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>> for SplineBasisFunctions

fn transform(&self, X: &ArrayView2<'_, Float>) -> SklResult<Array2<Float>>

Transform the input data