Struct CubicSpline 

pub struct CubicSpline { /* private fields */ }

A cubic spline through (xs, ys) knots.

Implementations

impl CubicSpline

pub fn new( xs: &[f64], ys: &[f64], bc: BoundaryCondition, ) -> Result<Self, RustyQLibError>

Build a spline through the knots (xs strictly increasing, at least two points; Not-a-Knot needs at least four and falls back to Natural below that).

pub fn eval(&self, x: f64) -> f64

Spline value at x (linear extrapolation beyond the knots).

pub fn derivative(&self, x: f64) -> f64

First derivative at x (constant beyond the knots).

pub fn second_derivative(&self, x: f64) -> f64

Second derivative at x (zero beyond the knots).

Trait Implementations

impl Clone for CubicSpline

fn clone(&self) -> CubicSpline

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CubicSpline

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

Formats the value using the given formatter.