Struct DaeIndexInfo 

pub struct DaeIndexInfo {
    pub structural_index: usize,
    pub n_hidden_constraints: usize,
    pub differentiation_schedule: Vec<(usize, usize)>,
    pub assignment: Vec<Option<usize>>,
    pub n_diff: usize,
    pub n_alg: usize,
}

Result of structural DAE index analysis.

Fields

structural_index: usize

Structural (Pantelides) index of the DAE system.

• 0: pure ODE (no algebraic equations)
• 1: index-1 DAE (algebraic constraints directly solvable)
• 2: index-2 DAE (constraints need 1 differentiation)
• 3: index-3 DAE (constraints need 2 differentiations)

n_hidden_constraints: usize

Number of hidden constraints discovered by the algorithm.

differentiation_schedule: Vec<(usize, usize)>

Schedule of differentiations: (equation_index, n_times_to_differentiate).

Each entry says “equation equation_index must be differentiated n_times_to_differentiate times to reduce the index.”

assignment: Vec<Option<usize>>

Assignment from the Pantelides algorithm: equation i is matched to variable assign[i]. Only meaningful after a successful structural analysis.

n_diff: usize

Number of differential variables in the original system.

n_alg: usize

Number of algebraic variables in the original system.

Trait Implementations

impl Clone for DaeIndexInfo

fn clone(&self) -> DaeIndexInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DaeIndexInfo

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

Formats the value using the given formatter.