Struct argmin::solver::conjugategradient::beta::PolakRibierePlus

pub struct PolakRibierePlus {}

Polak and Ribiere Plus (PR+) method

Formula: max(0, <\nabla f_{k+1}, (\nabla f_{k+1} - \nabla f_k)> / ||\nabla f_k||^2)

Implementations

impl PolakRibierePlus

pub fn new() -> Self

Construct a new instance of PolakRibierePlus.

Example

let beta_method = PolakRibierePlus::new();

Trait Implementations

impl Clone for PolakRibierePlus

fn clone(&self) -> PolakRibierePlus

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PolakRibierePlus

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

Formats the value using the given formatter.

impl Default for PolakRibierePlus

fn default() -> PolakRibierePlus

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PolakRibierePlus

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<G, P, F> NLCGBetaUpdate<G, P, F> for PolakRibierePlus

where G: ArgminDot<G, F> + ArgminSub<G, G> + ArgminL2Norm<F>, F: ArgminFloat,

fn update(&self, dfk: &G, dfk1: &G, _pk: &P) -> F

Update beta using the Polak-Ribiere+ (PR+) method.

Formula: max(0, <\nabla f_{k+1}, (\nabla f_{k+1} - \nabla f_k)> / ||\nabla f_k||^2)

Example

let beta_method = PolakRibierePlus::new();
let beta = beta_method.update(&dfk, &dfk1, &());

impl Serialize for PolakRibierePlus

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for PolakRibierePlus