Trait Transformer 

pub trait Transformer {
    // Required methods
    fn fit(&mut self, x: &Matrix<f32>) -> Result<()>;
    fn transform(&self, x: &Matrix<f32>) -> Result<Matrix<f32>>;

    // Provided method
    fn fit_transform(&mut self, x: &Matrix<f32>) -> Result<Matrix<f32>> { ... }
}

Trait for data transformers (scalers, encoders, etc.).

This trait defines the interface for preprocessing transformers. Implementations include scalers, encoders, and feature transformers.

Future Usage

let mut scaler = StandardScaler::new();
let x_scaled = scaler.fit_transform(&x)?;
let x_test_scaled = scaler.transform(&x_test)?;

Required Methods

fn fit(&mut self, x: &Matrix<f32>) -> Result<()>

Fits the transformer to data.

Errors

Returns an error if fitting fails.

fn transform(&self, x: &Matrix<f32>) -> Result<Matrix<f32>>

Transforms data using fitted parameters.

Errors

Returns an error if transformer is not fitted.

Provided Methods

fn fit_transform(&mut self, x: &Matrix<f32>) -> Result<Matrix<f32>>

Fits and transforms in one step.

Errors

Returns an error if fitting fails.

Implementors

impl Transformer for MinMaxScaler

impl Transformer for PCA

impl Transformer for StandardScaler

impl Transformer for TSNE