Struct Log1pShift 

pub struct Log1pShift;

log1p transform with a fitted shift for targets that may contain zero or negative values.

The fitted shift maps the minimum training value to margin, so transform(y) = ln(1 + y + shift). New values must satisfy y + shift >= 0.

Trait Implementations

impl Clone for Log1pShift

fn clone(&self) -> Log1pShift

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Log1pShift

impl Debug for Log1pShift

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

Formats the value using the given formatter.

impl Default for Log1pShift

fn default() -> Log1pShift

Returns the “default value” for a type.

impl Eq for Log1pShift

impl PartialEq for Log1pShift

fn eq(&self, other: &Log1pShift) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Log1pShift

impl TargetTransform for Log1pShift

type State = Log1pShiftState

Состояние transform-а, сохраняемое вместе с обученной моделью.

fn fit(y: &[f64]) -> Result<Self::State, TransformError>

Оценивает состояние transform-а по обучающему target.

fn transform(state: &Self::State, y: f64) -> f64

Преобразует одно значение target.

fn inverse(state: &Self::State, value: f64) -> f64

Возвращает значение на исходную шкалу.

fn transform_slice( state: &Self::State, y: &[f64], ) -> Result<Vec<f64>, TransformError>

Преобразует срез target в новый Vec.

fn transform_into( state: &Self::State, y: &[f64], out: &mut [f64], ) -> Result<(), TransformError>

Преобразует срез target в caller-provided output buffer.

fn fit_transform(y: &[f64]) -> Result<(Self::State, Vec<f64>), TransformError>

Оценивает состояние и преобразует весь target.

fn inverse_slice( state: &Self::State, values: &[f64], ) -> Result<Vec<f64>, TransformError>

Возвращает срез значений на исходную шкалу в новый Vec.

fn inverse_into( state: &Self::State, values: &[f64], out: &mut [f64], ) -> Result<(), TransformError>

Возвращает transform-scale values на исходную шкалу в caller-provided buffer.