Struct PCA

pub struct PCA { /* private fields */ }

Principal Component Analysis (PCA) dimensionality reduction

PCA finds the directions of maximum variance in the data and projects the data onto a lower dimensional space.

Implementations

impl PCA

pub fn new(n_components: usize, center: bool, scale: bool) -> Self

Creates a new PCA instance

Arguments

• n_components - Number of components to keep
• center - Whether to center the data before computing the SVD
• scale - Whether to scale the data before computing the SVD

Returns

• A new PCA instance

pub fn fit<S>(&mut self, x: &ArrayBase<S, Ix2>) -> Result<()>

where S: Data, S::Elem: Float + NumCast,

Fits the PCA model to the input data

Arguments

• x - The input data, shape (n_samples, n_features)

Returns

• Result<()> - Ok if successful, Err otherwise

pub fn transform<S>(&self, x: &ArrayBase<S, Ix2>) -> Result<Array2<f64>>

where S: Data, S::Elem: Float + NumCast,

Transforms the input data using the fitted PCA model

Arguments

• x - The input data, shape (n_samples, n_features)

Returns

• Result<Array2<f64>> - The transformed data, shape (n_samples, n_components)

pub fn fit_transform<S>(&mut self, x: &ArrayBase<S, Ix2>) -> Result<Array2<f64>>

where S: Data, S::Elem: Float + NumCast,

Fits the PCA model to the input data and transforms it

Arguments

• x - The input data, shape (n_samples, n_features)

Returns

• Result<Array2<f64>> - The transformed data, shape (n_samples, n_components)

pub fn components(&self) -> Option<&Array2<f64>>

Returns the principal components

Returns

• Option<&Array2<f64>> - The principal components, shape (n_components, n_features)

pub fn explained_variance_ratio(&self) -> Option<&Array1<f64>>

Returns the explained variance ratio

Returns

• Option<&Array1<f64>> - The explained variance ratio

Trait Implementations

impl Clone for PCA

fn clone(&self) -> PCA

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PCA

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

Formats the value using the given formatter.