Struct FittedMultiLabelBinarizer 

pub struct FittedMultiLabelBinarizer { /* private fields */ }

A fitted multi-label binarizer holding the discovered class set.

Created by calling Fit::fit on a MultiLabelBinarizer.

Implementations

impl FittedMultiLabelBinarizer

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<Vec<Vec<usize>>, FerroError>

Map a multi-hot indicator matrix back to label sets.

Each column value is thresholded at 0.5: values >= 0.5 are included.

Errors

Returns FerroError::ShapeMismatch if the number of columns does not match the number of classes.

Trait Implementations

impl Clone for FittedMultiLabelBinarizer

fn clone(&self) -> FittedMultiLabelBinarizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FittedMultiLabelBinarizer

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

Formats the value using the given formatter.

impl Transform<Vec<Vec<usize>>> for FittedMultiLabelBinarizer

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

Transform label sets into a multi-hot indicator matrix.

Each row has a 1.0 in every column corresponding to one of its labels and 0.0 elsewhere.

Errors

Returns FerroError::InvalidParameter if any label 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.