Struct FunctionTransformer 

pub struct FunctionTransformer<F, G, State = Untrained>
where
    F: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync,
    G: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync,
{ /* private fields */ }

FunctionTransformer applies arbitrary functions to transform data

This transformer is useful for stateless transformations such as taking the log, square root, or any other function. Unlike most other transformers, FunctionTransformer does not require fitting.

Implementations

impl<F, G> FunctionTransformer<F, G, Untrained>

where F: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync, G: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync,

pub fn new(func: F) -> Self

Create a new FunctionTransformer with the given function

pub fn inverse_func(self, inverse_func: G) -> Self

Set the inverse function

pub fn check_inverse(self, check_inverse: bool) -> Self

Set whether to check inverse

pub fn validate(self, validate: bool) -> Self

Set whether to validate input

impl<F, G> FunctionTransformer<F, G, Trained>

where F: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync, G: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync,

pub fn n_features_in(&self) -> usize

Get the number of input features

pub fn inverse_transform(&self, x: &Array2<Float>) -> Result<Array2<Float>>

Apply the inverse transformation

Trait Implementations

impl<F, G> Fit<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>, ()> for FunctionTransformer<F, G, Untrained>

where F: Fn(&Array2<Float>) -> Result<Array2<Float>> + Clone + Send + Sync, G: Fn(&Array2<Float>) -> Result<Array2<Float>> + Clone + Send + Sync,

type Fitted = FunctionTransformer<F, G, Trained>

The fitted model type

fn fit(self, x: &Array2<Float>, _y: &()) -> Result<Self::Fitted>

Fit the model to the provided data with validation

fn fit_with_validation( self, x: &X, y: &Y, _x_val: Option<&X>, _y_val: Option<&Y>, ) -> Result<(Self::Fitted, FitMetrics), SklearsError>

where Self: Sized,

Fit with custom validation and early stopping

impl<F, G> Transform<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>> for FunctionTransformer<F, G, Trained>

where F: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync, G: Fn(&Array2<Float>) -> Result<Array2<Float>> + Send + Sync,

fn transform(&self, x: &Array2<Float>) -> Result<Array2<Float>>

Transform the input data