Struct FeatureMap 

pub struct FeatureMap {
    pub feature_dim: usize,
}

Feature map: maps inputs to a (truncated) explicit feature space.

Fields

feature_dim: usize

Dimensionality of the feature space.

Implementations

impl FeatureMap

pub fn new(feature_dim: usize) -> Self

Create a new feature map.

pub fn inner_product(&self, x: &[f64], y: &[f64]) -> f64

Compute the inner product ⟨φ(x), φ(y)⟩ in feature space. For the linear kernel, φ(x) = x, so this is just the dot product.