Struct SIRModel 

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

SIR epidemic model (Susceptible–Infected–Recovered).

At each discrete time step:

1. Every Infected node infects each Susceptible neighbour with probability beta.
2. Every Infected node transitions to Recovered with probability gamma.

Fields

adjacency: AdjList

Adjacency list (undirected: each edge stored in both directions).

beta: f64

Infection probability per edge per step.

gamma: f64

Recovery probability per step.

num_nodes: usize

Total number of nodes.

Implementations

impl SIRModel

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

Create a new SIR 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, ) -> Result<Self>

Build from (source, target) edge list (unweighted).

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

Run a single SIR simulation from initial infected set.

Trait Implementations

impl Clone for SIRModel

fn clone(&self) -> SIRModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SIRModel

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

Formats the value using the given formatter.