Struct ProjectionSubproblem 

pub struct ProjectionSubproblem {
    pub lb: Array1<f32>,
    pub ub: Array1<f32>,
}

Projection sub-problem: project onto the box [lb, ub]

The augmented problem is:

  minimise  ‖x − v‖²  s.t.  lb ≤ x ≤ ub,  where v = z − u

which has the closed-form solution x̂ = clip(z − u, lb, ub).

Fields

lb: Array1<f32>

Per-element lower bounds

ub: Array1<f32>

Per-element upper bounds

Implementations

impl ProjectionSubproblem

pub fn new(lb: Array1<f32>, ub: Array1<f32>) -> Self

Create a box-projection sub-problem

Trait Implementations

impl AdmmSubproblem for ProjectionSubproblem

fn solve( &self, z: &Array1<f32>, u: &Array1<f32>, _rho: f32, ) -> Result<Array1<f32>, AdmmError>

Solve the local proximal sub-problem and return the updated xᵢ.

fn objective(&self, _x: &Array1<f32>) -> f32

Evaluate the local objective fᵢ(x)

fn dim(&self) -> usize

Dimension of the local variable xᵢ (must equal the global dimension)

impl Clone for ProjectionSubproblem

fn clone(&self) -> ProjectionSubproblem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionSubproblem

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

Formats the value using the given formatter.