shrinkage::Penalty

Error

Source: src/penalty.rs

type Error;

Failure returned by penalty evaluation.

validate_input

Source: src/penalty.rs

fn validate_input(
    &self,
    coefficients: &[f64]
) -> Result<(), <Self as Penalty>::Error>

Check parameters and coefficient compatibility independently of scaling.

The default evaluates the penalty and discards its value. Implementations can override this to validate without value arithmetic, allowing a zero Scaled penalty to avoid overflow in a value that is never used.

Errors

Reject invalid coefficients or parameters. The default also propagates errors from value evaluation.

value

Source: src/penalty.rs

fn value(&self, coefficients: &[f64]) -> Result<f64, <Self as Penalty>::Error>

Evaluate the penalty, including its strength.

Errors

Returns an error for invalid coefficients, parameters, or arithmetic.