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SplineInterpolation

oxiphysics_core::numerical_methods_ext

Struct SplineInterpolation 

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pub struct SplineInterpolation {
    pub xs: Vec<f64>,
    pub ys: Vec<f64>,
    pub m: Vec<f64>,
    pub kind: SplineKind,
}
Expand description

Natural cubic spline interpolation.

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§xs: Vec<f64>

Breakpoints (sorted ascending).

§ys: Vec<f64>

Values at breakpoints.

§m: Vec<f64>

Second derivatives at breakpoints (from tridiagonal solve).

§kind: SplineKind

Spline boundary condition type.

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impl SplineInterpolation

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pub fn fit(xs: &[f64], ys: &[f64], kind: SplineKind) -> Self

Fit cubic spline to data (xs, ys) with given boundary condition.

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

Evaluate spline at x.

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

Evaluate spline using proper cubic formula.

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