odeSIR: Ordinary differential equation function for multi-group...

In multigroup.vaccine: Analyze Outbreak Models of Multi-Group Populations with Vaccination

Ordinary differential equation function for multi-group susceptible-infectious-removed (SIR) model used as "func" argument passed to the ode() function from deSolve package

Description

Ordinary differential equation function for multi-group susceptible-infectious-removed (SIR) model used as "func" argument passed to the ode() function from deSolve package

Usage

odeSIR(time, state, par)

Arguments

time	vector of times at which the function will be evaluated
state	vector of number of individuals in each group at each state: S states followed by I states followed by R states
par	vector of parameter values: group-to-group transmission rate matrix elements (row-wise) followed by recovery rate

Value

a list of three vectors of derivatives dS, dI, and dR for each group, evaluated at the given state values

Examples

# Intended only for use as the func argument to the ode() function from the deSolve package:
y0 <- c(S1 = 79999, S2 = 20000, I1 = 1, I2 = 0, R1 = 0, R2 = 0)
parms <- c(beta11 = 1.6e-6, beta21 = 1.5e-6, beta12 = 1.4e-6, beta22 = 8.7e-6, recoveryrate = 1/7)
times <- seq(0, 350, len = 10)
deSolve::ode(y0, times, odeSIR, parms)

multigroup.vaccine documentation built on Sept. 19, 2026, 1:06 a.m.