Enum BSplineKnotSpec 

pub enum BSplineKnotSpec {
    Generate {
        data_range: (f64, f64),
        num_internal_knots: usize,
    },
    PeriodicUniform {
        data_range: (f64, f64),
        num_basis: usize,
    },
    Automatic {
        num_internal_knots: Option<usize>,
        placement: BSplineKnotPlacement,
    },
    Provided(Array1<f64>),
    NaturalCubicRegression {
        knots: Array1<f64>,
    },
}

Which knot strategy to use for 1D B-spline bases.

Variants

Generate

Fields

data_range: (f64, f64)

num_internal_knots: usize

PeriodicUniform

Uniform cyclic B-spline basis on [data_range.0, data_range.1).

The first and last endpoints are identified, so evaluating at x and x + m * period gives identical rows. num_basis is the number of periodic control sites around the loop and must be at least degree + 1 for an unaliased local support stencil.

Fields

data_range: (f64, f64)

num_basis: usize

Automatic

Fields

num_internal_knots: Option<usize>

placement: BSplineKnotPlacement

Provided(Array1<f64>)

NaturalCubicRegression

Natural cubic regression spline (bs="cr"/"cs") knot set (#1074).

Unlike the open-spline variants above, these knots are the k Lancaster–Salkauskas knots x*_1 < … < x*_k that directly index the basis values β_i = f(x*_i) — the basis dimension equals knots.len() (not knots.len() - degree - 1). The 1-D builder routes this variant to the cubic-regression builder; the cr identity therefore round-trips through freeze/reload by virtue of the variant itself (no separate metadata marker is required), and tensor margins inherit cr by carrying this knotspec into build_bspline_basis_1d.

Fields

knots: Array1<f64>

Trait Implementations

impl Clone for BSplineKnotSpec

fn clone(&self) -> BSplineKnotSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BSplineKnotSpec

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BSplineKnotSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for BSplineKnotSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.