Struct FittedLabelBinarizer 

pub struct FittedLabelBinarizer { /* private fields */ }

A fitted label binarizer holding the discovered class set.

Created by calling Fit::fit on a LabelBinarizer.

Implementations

impl FittedLabelBinarizer

pub fn classes(&self) -> &[usize]

Return the sorted class labels discovered during fitting.

pub fn n_classes(&self) -> usize

Return the number of unique classes.

pub fn inverse_transform( &self, y: &Array2<f64>, ) -> Result<Array1<usize>, FerroError>

Map a binary indicator matrix back to integer class labels.

For each row the class with the largest value (argmax) is chosen.

Errors

Returns FerroError::ShapeMismatch if the number of columns does not match the expected output width (1 for binary, K for multiclass).

Trait Implementations

impl Clone for FittedLabelBinarizer

fn clone(&self) -> FittedLabelBinarizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FittedLabelBinarizer

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

Formats the value using the given formatter.

impl Transform<ArrayBase<OwnedRepr<usize>, Dim<[usize; 1]>>> for FittedLabelBinarizer

fn transform(&self, y: &Array1<usize>) -> Result<Array2<f64>, FerroError>

Transform labels into a binary indicator matrix.

• For K = 2 classes the output shape is (n, 1).
• For K > 2 classes the output shape is (n, K).

Errors

Returns FerroError::InvalidParameter if any label in y was not seen during fitting.

type Output = ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>

The transformed output type.

type Error = FerroError

The error type returned by transform.