Struct SparseDelta 

pub struct SparseDelta {
    pub indices: Vec<usize>,
    pub values: Vec<Precision>,
}

A sparse update to a right-hand side vector. indices[i] names the row whose value in b changed by values[i] (additive — pass the delta, not the new absolute value).

Indices need not be sorted or unique; duplicates are summed.

Fields

indices: Vec<usize>

Row indices into the RHS vector.

values: Vec<Precision>

The additive change at each index. Must be the same length as indices.

Implementations

impl SparseDelta

pub fn new(indices: Vec<usize>, values: Vec<Precision>) -> Result<Self>

Construct a sparse delta. Validates that the two vectors have the same length; returns Err(InvalidInput) otherwise.

pub fn empty() -> Self

Construct an empty delta. Useful as the identity element of apply_delta_to.

pub fn nnz(&self) -> usize

Number of non-zero changes.

pub fn is_empty(&self) -> bool

True if the delta has no changes.

pub fn apply_to(&self, b: &mut [Precision]) -> Result<()>

Apply this delta to a dense b vector in-place.

pub fn as_pairs(&self) -> Vec<(usize, Precision)>

Convert to the &[(usize, Precision)] shape expected by SolverAlgorithm::update_rhs.

Trait Implementations

impl Clone for SparseDelta

fn clone(&self) -> SparseDelta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SparseDelta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SparseDelta

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SparseDelta

fn eq(&self, other: &SparseDelta) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for SparseDelta

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SparseDelta