Struct ReducedRowActivityReport 

pub struct ReducedRowActivityReport {
    pub mu: f64,
    pub row: Vec<usize>,
    pub status: Vec<i8>,
    pub ratio: Vec<f64>,
    pub q_reduced: Vec<f64>,
    pub q_sign: Vec<i8>,
    pub sigma: Vec<f64>,
}

One constraint row’s activity re-measured against the curvature that actually generates its multiplier, rather than against the directional curvature along its own gradient (gh#804).

Parallel arrays, one entry per requested row, in the order they were requested. See reduced_row_activity for what the quantities mean.

Fields

mu: f64

Barrier parameter of the converged iterate, as ActivityReport::mu.

row: Vec<usize>

The user-space constraint index each entry answers about.

status: Vec<i8>

Status from the same rule ActivityReport::row_status uses, applied to Self::ratio.

ratio: Vec<f64>

Σ_j‖∇dⱼ‖² / |q_j^red|. NaN where nothing was classified.

The numerator is the geometric barrier weight, not the raw Σ_j Self::sigma reports — the same pairing ActivityReport::row_ratio uses, so the two ratios are directly comparable and agree on a decoupled row.

q_reduced: Vec<f64>

The reduced curvature q_j^red itself, signed, along the unit normal ∇dⱼ/‖∇dⱼ‖ and in natural (unscaled) units — the same quantity and units ActivityReport::row_q_sign takes the sign of, so it is what |∇dⱼᵀH∇dⱼ|/‖∇dⱼ‖² would have been had the curvature been reduced. NaN for an EQUALITY row and where the back-solve offers no reduced curvature (see reduced_row_activity).

q_sign: Vec<i8>

Sign of Self::q_reduced (−1, 0, +1); the absolute value is what the ratio divides by.

sigma: Vec<f64>

Σ_j, RAW (not the geometric weight the ratio uses) and in natural units, identical to the same row’s entry in ActivityReport::row_sigma.

Trait Implementations

impl Clone for ReducedRowActivityReport

fn clone(&self) -> ReducedRowActivityReport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReducedRowActivityReport

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

Formats the value using the given formatter.