Struct SISModel 

pub struct SISModel {
    pub adjacency: AdjList,
    pub beta: f64,
    pub gamma: f64,
    pub num_nodes: usize,
    pub max_steps: usize,
}

SIS epidemic model (Susceptible–Infected–Susceptible).

Like SIR except Recovered nodes return to Susceptible rather than gaining immunity. The simulation terminates when no infected nodes remain or after max_steps steps.

Fields

adjacency: AdjList

Adjacency list.

beta: f64

Infection probability per edge per step.

gamma: f64

Recovery probability per step (returns to Susceptible).

num_nodes: usize

Total number of nodes.

max_steps: usize

Maximum simulation steps before forced termination.

Implementations

impl SISModel

pub fn new( adjacency: AdjList, num_nodes: usize, beta: f64, gamma: f64, max_steps: usize, ) -> Result<Self>

Create a new SIS model.

Errors

Returns GraphError::InvalidParameter when beta or gamma ∉ [0, 1].

pub fn from_edges( edges: &[(usize, usize)], num_nodes: usize, beta: f64, gamma: f64, max_steps: usize, ) -> Result<Self>

Build from unweighted edge list.

pub fn simulate(&self, initial_infected: &[usize]) -> Result<SimulationResult>

Run a single SIS simulation from initial infected set.

Trait Implementations

impl Clone for SISModel

fn clone(&self) -> SISModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SISModel

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

Formats the value using the given formatter.