Struct optimization::ExactLineSearch

pub struct ExactLineSearch { /* fields omitted */ }

Brute-force line search minimizing the objective function over a set of step width candidates, also known as exact line search.

Methods

impl ExactLineSearch

pub fn new(
    start_step_width: f64,
    stop_step_width: f64,
    increase_factor: f64
) -> ExactLineSearch

Creates a new ExactLineSearch given the start_step_width, the stop_step_width and the increase_factor. The set of evaluated step widths γ is specified as { γ | γ = start_step_width · increase_factorⁱ, i ∈ N, γ <= stop_step_width }, assuming that start_step_width < stop_step_width and increase_factor > 1.

Trait Implementations

impl Clone for ExactLineSearch

fn clone(&self) -> ExactLineSearch

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ExactLineSearch

impl Debug for ExactLineSearch

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

Formats the value using the given formatter.

impl LineSearch for ExactLineSearch

fn search<F>(
    &self,
    function: &F,
    initial_position: &[f64],
    direction: &[f64]
) -> Vec<f64> where
    F: Function1, 

Performs the actual line search given the current position x and a direction to go to. Returns the new position.