lazymatrix::ColumnNormalization

LazyMatrix for Rust · 0.9.0

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pub struct ColumnNormalization

A column normalization specification: an independent Centering and Scaling choice.

Use Self::standardize, Self::min_max, or Self::robust for common recipes, or Self::new for a custom combination. The default performs no centering or scaling.

Non-translation-invariant scales are computed from centered columns (see ColumnStats::col_l1_centered, ColumnStats::col_l2_centered, and ColumnStats::col_maxabs_centered.

Fields

center

pub center: Centering

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scale

pub scale: Scaling

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Inherent implementation

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impl ColumnNormalization

min_max

pub const fn min_max() -> Self

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Subtract each column's minimum and divide by its range.

Finite, nonconstant columns span [0, 1] on the fitting data. Fitting replaces exact zero ranges with one, so constant columns become zero. Reusing the fitted parameters does not clip new observations to [0, 1].

new

pub const fn new(center: Centering, scale: Scaling) -> Self

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Build a specification from its two axes.

robust

pub fn robust() -> Self

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Subtract each column's median and divide by its interquartile range.

The range uses the 25th and 75th percentiles with linear interpolation at (nrows - 1) * q. It has no standard-normal calibration and does not target unit variance. Fitting replaces exact zero ranges with one. Use Self::new with Scaling::QuantileRange for custom bounds.

standardize

pub const fn standardize() -> Self

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Subtract each column's mean and divide by its population standard deviation.

The variance uses nrows as its divisor. Fitting with crate::LazyMatrix::new replaces exact zero standard deviations with one, so constant columns become zero. For sample standard deviations, use ColumnNormalization::new(Centering::Mean, Scaling::Sd { df: 1 }).

Implementation of Clone

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impl Clone for ColumnNormalization

clone

fn clone(&self) -> Self

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Implementation of Copy

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impl Copy for ColumnNormalization

Implementation of Debug

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impl Debug for ColumnNormalization

fmt

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

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Implementation of Default

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impl Default for ColumnNormalization

default

fn default() -> Self

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Implementation of Eq

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impl Eq for ColumnNormalization

Implementation of PartialEq

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impl PartialEq for ColumnNormalization

eq

fn eq(&self, other: &Self) -> bool

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Implementation of StructuralPartialEq

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impl StructuralPartialEq for ColumnNormalization

Implementation of Freeze

impl Freeze for ColumnNormalization

Implementation of RefUnwindSafe

impl RefUnwindSafe for ColumnNormalization

Implementation of Send

impl Send for ColumnNormalization

Implementation of Sync

impl Sync for ColumnNormalization

Implementation of Unpin

impl Unpin for ColumnNormalization

Implementation of UnsafeUnpin

impl UnsafeUnpin for ColumnNormalization

Implementation of UnwindSafe

impl UnwindSafe for ColumnNormalization

Implementation of Any

impl<T> Any for T where T: 'static + ?Sized

Implementation of Boilerplate

impl<T> Boilerplate for T where T: Copy + Send + Sync + Debug + PartialEq + 'static

Implementation of Borrow

impl<T> Borrow<T> for T where T: ?Sized

Implementation of BorrowMut

impl<T> BorrowMut<T> for T where T: ?Sized

Implementation of ByRef

impl<T> ByRef<T> for T

Implementation of CastableFrom

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT where ST: ?Sized, DT: ?Sized

Implementation of CastableFrom

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT where ST: ?Sized, DT: ?Sized

Implementation of CloneToUninit

impl<T> CloneToUninit for T where T: Clone

Implementation of Equivalent

impl<Q, K> Equivalent<K> for Q where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized

Implementation of Equivalent

impl<Q, K> Equivalent<K> for Q where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized

Implementation of From

impl<T> From<T> for T

Implementation of Imply

impl<T, U> Imply<T> for U where T: ?Sized, U: ?Sized

Implementation of Into

impl<T, U> Into<U> for T where U: From<T>

Implementation of IntoEither

impl<T> IntoEither for T

Implementation of Pointable

impl<T> Pointable for T

Implementation of Read

impl<T> Read<Exclusive, BecauseExclusive> for T where T: ?Sized

Implementation of Same

impl<T> Same for T

Implementation of Scalar

impl<T> Scalar for T where T: 'static + Clone + PartialEq + Debug

Implementation of SupersetOf

impl<SS, SP> SupersetOf<SS> for SP where SS: SubsetOf<SP>

Implementation of ToOwned

impl<T> ToOwned for T where T: Clone

Implementation of TryFrom

impl<T, U> TryFrom<U> for T where U: Into<T>

Implementation of TryInto

impl<T, U> TryInto<U> for T where U: TryFrom<T>