Struct SimpleImputer 

pub struct SimpleImputer { /* private fields */ }

Replace missing values (NaN) with a per-column statistic.

Implementations

impl SimpleImputer

pub fn mean() -> Self

Impute with the column mean of the non-missing values.

pub fn median() -> Self

Impute with the column median of the non-missing values.

pub fn constant(value: f64) -> Self

Impute with a fixed constant.

Trait Implementations

impl Clone for SimpleImputer

fn clone(&self) -> SimpleImputer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SimpleImputer

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

Formats the value using the given formatter.

impl Transformer for SimpleImputer

fn name(&self) -> &'static str

A short, stable name for diagnostics.

fn fit(&mut self, frame: &Frame) -> Result<()>

Learn any parameters needed to transform (means, encodings, …).

fn transform(&self, frame: &Frame) -> Result<Frame>

Map an input frame to an output frame using the fitted parameters.

fn onnx_prefix(&self) -> Option<Prefix>

This transformer as an ONNX graph Prefix, so a pipeline can splice it in front of the estimator on export. Defaults to the affine map from as_affine; non-affine steps that are still ONNX-expressible (e.g. imputers) override this. None means “not ONNX-exportable”.

fn fit_transform(&mut self, frame: &Frame) -> Result<Frame>

Fit then transform in one pass. Override for a cheaper combined path.

fn as_affine(&self) -> Option<(Vec<f64>, Vec<f64>)>

If (once fitted) this transformer is an affine map y = (x - shift) / scale per column, return (shift, scale).

fn set_param(&mut self, name: &str, _value: ParamValue) -> Result<()>

Set a hyperparameter by name. Unknown names are an error.